diff --git a/Projects/App/Project.swift b/Projects/App/Project.swift
index 3ec2bb8a..c58e3a91 100644
--- a/Projects/App/Project.swift
+++ b/Projects/App/Project.swift
@@ -25,8 +25,6 @@ let project = Project(
                 .project(target: "Presentation", path: "../Presentation"),
                 .project(target: "Domain", path: "../Domain"),
                 .project(target: "DataSource", path: "../DataSource"),
-                .project(target: "NetworkService", path: "../NetworkService"),
-                .project(target: "Persistence", path: "../Persistence"),
                 .project(target: "Shared", path: "../Shared")
             ]
         )
diff --git a/Projects/App/Sources/DependencyInjection.swift b/Projects/App/Sources/DependencyInjection.swift
index ad2b5a19..f1770f5a 100644
--- a/Projects/App/Sources/DependencyInjection.swift
+++ b/Projects/App/Sources/DependencyInjection.swift
@@ -8,16 +8,12 @@
 import DataSource
 import Domain
 import Foundation
-import NetworkService
-import Persistence
 import Presentation
 import Shared
 
 extension DIContainer {
     func dependencyInjection() {
-        let networkAssembler = NetworkDependencyAssembler()
-        let persistenceAssembler = PersistenceDependencyAssembler()
-        let dataSourceAssembler = DataSourceDependencyAssembler(preAssemblers: [networkAssembler, persistenceAssembler])
+        let dataSourceAssembler = DataSourceDependencyAssembler()
         let domainAssembler = DomainDependencyAssembler(preAssembler: dataSourceAssembler)
         let presentationAssembler = PresentationDependencyAssembler(preAssembler: domainAssembler)
         presentationAssembler.assemble()
diff --git a/Projects/App/Sources/SceneDelegate.swift b/Projects/App/Sources/SceneDelegate.swift
index 1d163d49..947a6019 100644
--- a/Projects/App/Sources/SceneDelegate.swift
+++ b/Projects/App/Sources/SceneDelegate.swift
@@ -5,6 +5,7 @@
 //  Created by 최정인 on 6/15/25.
 //
 
+import Domain
 import KakaoSDKAuth
 import Presentation
 import Shared
@@ -19,13 +20,23 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
         DIContainer.shared.dependencyInjection()
 
-        let introView = IntroView()
-        let navigationController = UINavigationController(rootViewController: introView)
+        guard let userDataRepository = DIContainer.shared.resolve(type: UserDataRepositoryProtocol.self)
+        else { fatalError("userDataRepository 의존성이 등록되지 않았습니다.") }
 
-        window.rootViewController = navigationController
+        window.rootViewController = SplashView()
         window.makeKeyAndVisible()
-
         self.window = window
+
+        Task { @MainActor in
+            let isLogined = await userDataRepository.reissueToken()
+            if isLogined {
+                window.rootViewController = TabBarView()
+            } else {
+                let introView = IntroView()
+                let navigationController = UINavigationController(rootViewController: introView)
+                window.rootViewController = navigationController
+            }
+        }
     }
 
     func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
diff --git a/Projects/DataSource/Sources/Common/DataSourceDependencyAssembler.swift b/Projects/DataSource/Sources/Common/DataSourceDependencyAssembler.swift
index 95d2c27f..fcfb725a 100644
--- a/Projects/DataSource/Sources/Common/DataSourceDependencyAssembler.swift
+++ b/Projects/DataSource/Sources/Common/DataSourceDependencyAssembler.swift
@@ -5,41 +5,24 @@
 //  Created by 최정인 on 6/26/25.
 //
 
-import Foundation
 import Domain
+import Foundation
 import Shared
 
 public struct DataSourceDependencyAssembler: DependencyAssemblerProtocol {
-    private let preAssemblers: [DependencyAssemblerProtocol]
-
-    public init(preAssemblers: [DependencyAssemblerProtocol]) {
-        self.preAssemblers = preAssemblers
-    }
+    public init() { }
 
     public func assemble() {
-        preAssemblers.forEach { assembler in
-            assembler.assemble()
-        }
-        
-        guard
-            let networkService = DIContainer.shared.resolve(type: NetworkServiceProtocol.self),
-            let keychainStorage = DIContainer.shared.resolve(type: KeychainStorageProtocol.self),
-            let userDefaultsStorage = DIContainer.shared.resolve(type: UserDefaultsStorageProtocol.self)
-        else { fatalError("networkService, keychainStorage, userDefaultsStorage 의존성이 등록되지 않았습니다.") }
-
         DIContainer.shared.register(type: AuthRepositoryProtocol.self) { _ in
-            return AuthRepository(
-                networkService: networkService,
-                keychainStorage: keychainStorage,
-                userDefaultsStorage: userDefaultsStorage)
+            return AuthRepository()
         }
 
         DIContainer.shared.register(type: OnboardingRepositoryProtocol.self) { _ in
-            return OnboardingRepository(networkService: networkService, keychainStorage: keychainStorage)
+            return OnboardingRepository()
         }
 
         DIContainer.shared.register(type: UserDataRepositoryProtocol.self) { _ in
-            return UserDataRepository(keychainStorage: keychainStorage, userDefaultsStorage: userDefaultsStorage)
+            return UserDataRepository()
         }
     }
 }
diff --git a/Projects/DataSource/Sources/Common/Enum/Endpoint.swift b/Projects/DataSource/Sources/Common/Enum/Endpoint.swift
index 361e8ddb..cd47d6b5 100644
--- a/Projects/DataSource/Sources/Common/Enum/Endpoint.swift
+++ b/Projects/DataSource/Sources/Common/Enum/Endpoint.swift
@@ -12,4 +12,5 @@ public protocol Endpoint {
     var headers: [String: String] { get }
     var queryParameters: [String: String] { get }
     var bodyParameters: [String: Any] { get }
+    var isAuthorized: Bool { get }
 }
diff --git a/Projects/DataSource/Sources/Common/Enum/UserDefaultsKey.swift b/Projects/DataSource/Sources/Common/Enum/UserDefaultsKey.swift
index 4028411f..8e0eb971 100644
--- a/Projects/DataSource/Sources/Common/Enum/UserDefaultsKey.swift
+++ b/Projects/DataSource/Sources/Common/Enum/UserDefaultsKey.swift
@@ -7,4 +7,6 @@
 
 enum UserDefaultsKey: String {
     case nickname
+    case socialLoginType
+    case profileImageUrl
 }
diff --git a/Projects/DataSource/Sources/Common/Error/AuthError.swift b/Projects/DataSource/Sources/Common/Error/AuthError.swift
index babca118..39a1fbd3 100644
--- a/Projects/DataSource/Sources/Common/Error/AuthError.swift
+++ b/Projects/DataSource/Sources/Common/Error/AuthError.swift
@@ -7,6 +7,7 @@
 
 enum AuthError: Error, CustomStringConvertible {
     case kakaoTokenFetchFailed
+    case kakaoUserInformationFetchFailed
     case tokenSaveFailed
     case tokenLoadFailed
     case tokenRemoveFailed
@@ -20,6 +21,8 @@ enum AuthError: Error, CustomStringConvertible {
         switch self {
         case .kakaoTokenFetchFailed:
             return "카카오 토큰을 가져오는데 실패했습니다."
+        case .kakaoUserInformationFetchFailed:
+            return "카카오 유저 정보를 가져오는데 실패했습니다."
         case .tokenSaveFailed:
             return "토큰 저장에 실패했습니다."
         case .tokenLoadFailed:
diff --git a/Projects/DataSource/Sources/Common/Error/TokenError.swift b/Projects/DataSource/Sources/Common/Error/TokenError.swift
new file mode 100644
index 00000000..38cc3920
--- /dev/null
+++ b/Projects/DataSource/Sources/Common/Error/TokenError.swift
@@ -0,0 +1,23 @@
+//
+//  TokenError.swift
+//  DataSource
+//
+//  Created by 최정인 on 7/26/25.
+//
+
+enum TokenError: Error, CustomStringConvertible {
+    case tokenSaveFailed
+    case tokenLoadFailed
+    case tokenRemoveFailed
+
+    public var description: String {
+        switch self {
+        case .tokenSaveFailed:
+            return "토큰 저장에 실패했습니다."
+        case .tokenLoadFailed:
+            return "토큰 불러오기에 실패했습니다."
+        case .tokenRemoveFailed:
+            return "토큰 삭제에 실패했습니다."
+        }
+    }
+}
diff --git a/Projects/DataSource/Sources/Common/Error/UserError.swift b/Projects/DataSource/Sources/Common/Error/UserError.swift
index c8c1e26d..964ca8c3 100644
--- a/Projects/DataSource/Sources/Common/Error/UserError.swift
+++ b/Projects/DataSource/Sources/Common/Error/UserError.swift
@@ -6,17 +6,37 @@
 //
 
 enum UserError: Error, CustomStringConvertible {
-    case accessTokenLoadFailed
+    case nicknameSaveFailed
     case nicknameLoadFailed
+    case nicknameRemoveFailed
+    case socialLoginTypeSaveFailed
+    case socialLoginTypeLoadFailed
+    case socialLoginTypeRemoveFailed
+    case profileImageUrlSaveFailed
+    case profileImageUrlLoadFailed
+    case profileImageUrlRemoveFailed
     case unknown(error: Error)
 
-
     var description: String {
         switch self {
-        case .accessTokenLoadFailed:
-            return "토큰 불러오기에 실패했습니다."
+        case .nicknameSaveFailed:
+            return "닉네임 저장 실패했습니다."
         case .nicknameLoadFailed:
             return "닉네임 불러오기에 실패했습니다."
+        case .nicknameRemoveFailed:
+            return "닉네임 삭제 실패했습니다."
+        case .socialLoginTypeSaveFailed:
+            return "소셜 로그인 타입 저장 실패했습니다."
+        case .socialLoginTypeLoadFailed:
+            return "소셜 로그인 타입 불러오기에 실패했습니다."
+        case .socialLoginTypeRemoveFailed:
+            return "소셜 로그인 타입 삭제 실패했습니다."
+        case .profileImageUrlSaveFailed:
+            return "유저 프로필 저장 실패했습니다."
+        case .profileImageUrlLoadFailed:
+            return "유저 프로필 불러오기에 실패했습니다."
+        case .profileImageUrlRemoveFailed:
+            return "유저 프로필 삭제 실패했습니다."
         case .unknown(let error):
             return "알 수 없는 에러가 발생했습니다. \(error.localizedDescription)"
         }
diff --git a/Projects/DataSource/Sources/Common/TokenManager.swift b/Projects/DataSource/Sources/Common/TokenManager.swift
new file mode 100644
index 00000000..a8bc836c
--- /dev/null
+++ b/Projects/DataSource/Sources/Common/TokenManager.swift
@@ -0,0 +1,31 @@
+//
+//  TokenManager.swift
+//  DataSource
+//
+//  Created by 최정인 on 7/26/25.
+//
+
+final class TokenManager {
+    static let shared = TokenManager()
+    private let keychainStorage = KeychainStorage.shared
+
+    private init() { }
+
+    func loadToken(tokenType: TokenType) throws -> String {
+        guard let token: String = keychainStorage.load(forKey: tokenType.rawValue)
+        else { throw TokenError.tokenLoadFailed }
+        return token
+    }
+
+    func saveToken(token: String, tokenType: TokenType) throws {
+        guard keychainStorage.save(token, forKey: tokenType.rawValue)
+        else { throw TokenError.tokenSaveFailed }
+    }
+
+    func removeToken() throws {
+        guard
+            keychainStorage.remove(forKey: TokenType.accessToken.rawValue),
+            keychainStorage.remove(forKey: TokenType.refreshToken.rawValue)
+        else { throw TokenError.tokenRemoveFailed }
+    }
+}
diff --git a/Projects/DataSource/Sources/DTO/TokenResponseDTO.swift b/Projects/DataSource/Sources/DTO/TokenResponseDTO.swift
new file mode 100644
index 00000000..df994f51
--- /dev/null
+++ b/Projects/DataSource/Sources/DTO/TokenResponseDTO.swift
@@ -0,0 +1,11 @@
+//
+//  TokenResponseDTO.swift
+//  DataSource
+//
+//  Created by 최정인 on 7/26/25.
+//
+
+struct TokenResponseDTO: Decodable {
+    let accessToken: String
+    let refreshToken: String
+}
diff --git a/Projects/DataSource/Sources/Endpoint/AuthEndpoint.swift b/Projects/DataSource/Sources/Endpoint/AuthEndpoint.swift
index 0f7a1b61..b22943f2 100644
--- a/Projects/DataSource/Sources/Endpoint/AuthEndpoint.swift
+++ b/Projects/DataSource/Sources/Endpoint/AuthEndpoint.swift
@@ -10,17 +10,17 @@ import Domain
 
 enum AuthEndpoint {
     case login(socialLoginType: SocialLoginType, nickname: String?, token: String)
-    case logout(accessToken: String)
-    case withdraw(accessToken: String)
+    case logout
+    case withdraw
     case reissue(refreshToken: String)
-    case agreements(accessToken: String, agreements: [TermsType: Bool])
+    case agreements(agreements: [TermsType: Bool])
 }
 
 extension AuthEndpoint: Endpoint {
     var baseURL: String {
         return AppProperties.baseURL + "/api/v1/auth"
     }
-    
+
     var path: String {
         switch self {
         case .login: baseURL + "/login"
@@ -30,11 +30,11 @@ extension AuthEndpoint: Endpoint {
         case .agreements: baseURL + "/agreements"
         }
     }
-    
+
     var method: HTTPMethod {
         return .post
     }
-    
+
     var headers: [String : String] {
         var headers: [String: String] = [
             "Content-Type": "application/json",
@@ -44,23 +44,19 @@ extension AuthEndpoint: Endpoint {
         switch self {
         case .login(_, _, let token):
             headers["SocialAccessToken"] = token
-        case .logout(let accessToken):
-            headers["Authorization"] = "Bearer \(accessToken)"
-        case .withdraw(let accessToken):
-            headers["Authorization"] = "Bearer \(accessToken)"
         case .reissue(let refreshToken):
             headers["Refresh-Token"] = refreshToken
-        case .agreements(let accessToken, _):
-            headers["Authorization"] = "Bearer \(accessToken)"
+        default:
+            break
         }
 
         return headers
     }
-    
+
     var queryParameters: [String : String] {
         return [:]
     }
-    
+
     var bodyParameters: [String : Any] {
         switch self {
         case .login(let socialLoginType, let nickname, _):
@@ -69,7 +65,7 @@ extension AuthEndpoint: Endpoint {
                 parameters["nickname"] = nickname
             }
             return parameters
-        case .agreements(_, let agreements):
+        case .agreements(let agreements):
             var parameters: [String: Any] = [:]
             for agreement in agreements {
                 parameters[agreement.key.termKey] = agreement.value
@@ -79,6 +75,13 @@ extension AuthEndpoint: Endpoint {
             return [:]
         }
     }
+
+    var isAuthorized: Bool {
+        switch self {
+        case .login, .reissue: false
+        case .logout, .withdraw, .agreements: true
+        }
+    }
 }
 
 extension TermsType {
diff --git a/Projects/DataSource/Sources/Endpoint/OnboardingEndpoint.swift b/Projects/DataSource/Sources/Endpoint/OnboardingEndpoint.swift
index e0be0991..554704da 100644
--- a/Projects/DataSource/Sources/Endpoint/OnboardingEndpoint.swift
+++ b/Projects/DataSource/Sources/Endpoint/OnboardingEndpoint.swift
@@ -8,8 +8,8 @@
 import Foundation
 
 enum OnboardingEndpoint {
-    case registerOnboarding(accessToken: String, choices: [String: String])
-    case registerRecommendedRoutine(accessToken: String, selectedRoutines: [Int])
+    case registerOnboarding(choices: [String: String])
+    case registerRecommendedRoutine(selectedRoutines: [Int])
 }
 
 extension OnboardingEndpoint: Endpoint {
@@ -29,18 +29,10 @@ extension OnboardingEndpoint: Endpoint {
     }
     
     var headers: [String : String] {
-        var headers: [String: String] = [
+        let headers: [String: String] = [
             "Content-Type": "application/json",
             "accept": "*/*"
         ]
-
-        switch self {
-        case .registerOnboarding(let accessToken, _):
-            headers["Authorization"] = "Bearer \(accessToken)"
-        case .registerRecommendedRoutine(let accessToken, _):
-            headers["Authorization"] = "Bearer \(accessToken)"
-        }
-
         return headers
     }
     
@@ -50,10 +42,14 @@ extension OnboardingEndpoint: Endpoint {
     
     var bodyParameters: [String : Any] {
         switch self {
-        case .registerOnboarding(_, let choices):
+        case .registerOnboarding(let choices):
             return choices
-        case .registerRecommendedRoutine(_, let selectedRoutines):
+        case .registerRecommendedRoutine(let selectedRoutines):
             return ["recommendedRoutineIds": selectedRoutines]
         }
     }
+
+    var isAuthorized: Bool {
+        return true
+    }
 }
diff --git a/Projects/NetworkService/Sources/BaseResponse.swift b/Projects/DataSource/Sources/NetworkService/BaseResponse.swift
similarity index 100%
rename from Projects/NetworkService/Sources/BaseResponse.swift
rename to Projects/DataSource/Sources/NetworkService/BaseResponse.swift
diff --git a/Projects/NetworkService/Sources/Extension/Endpoint+.swift b/Projects/DataSource/Sources/NetworkService/Extension/Endpoint+.swift
similarity index 96%
rename from Projects/NetworkService/Sources/Extension/Endpoint+.swift
rename to Projects/DataSource/Sources/NetworkService/Extension/Endpoint+.swift
index 4058a47d..83ab723f 100644
--- a/Projects/NetworkService/Sources/Extension/Endpoint+.swift
+++ b/Projects/DataSource/Sources/NetworkService/Extension/Endpoint+.swift
@@ -5,7 +5,6 @@
 //  Created by 최정인 on 6/21/25.
 //
 
-import DataSource
 import Foundation
 
 extension Endpoint {
diff --git a/Projects/NetworkService/Sources/Extension/URLRequest+.swift b/Projects/DataSource/Sources/NetworkService/Extension/URLRequest+.swift
similarity index 100%
rename from Projects/NetworkService/Sources/Extension/URLRequest+.swift
rename to Projects/DataSource/Sources/NetworkService/Extension/URLRequest+.swift
diff --git a/Projects/NetworkService/Sources/NetworkError.swift b/Projects/DataSource/Sources/NetworkService/NetworkError.swift
similarity index 86%
rename from Projects/NetworkService/Sources/NetworkError.swift
rename to Projects/DataSource/Sources/NetworkService/NetworkError.swift
index 0a9f02ea..73b823ef 100644
--- a/Projects/NetworkService/Sources/NetworkError.swift
+++ b/Projects/DataSource/Sources/NetworkService/NetworkError.swift
@@ -5,14 +5,14 @@
 //  Created by 최정인 on 6/23/25.
 //
 
-public enum NetworkError: Error, CustomStringConvertible {
+enum NetworkError: Error, CustomStringConvertible {
     case invalidURL
     case invalidResponse
     case invalidStatusCode(statusCode: Int)
     case emptyData
     case decodingError
 
-    public var description: String {
+    var description: String {
         switch self {
         case .invalidURL:
             return "invalidURL"
diff --git a/Projects/NetworkService/Sources/NetworkService.swift b/Projects/DataSource/Sources/NetworkService/NetworkService.swift
similarity index 66%
rename from Projects/NetworkService/Sources/NetworkService.swift
rename to Projects/DataSource/Sources/NetworkService/NetworkService.swift
index 24f84568..55d846c5 100644
--- a/Projects/NetworkService/Sources/NetworkService.swift
+++ b/Projects/DataSource/Sources/NetworkService/NetworkService.swift
@@ -5,21 +5,22 @@
 //  Created by 최정인 on 6/19/25.
 //
 
-import DataSource
 import Foundation
 import Shared
 
-public final class NetworkService: NetworkServiceProtocol {
-    private let networkProvider: NetworkProviderProtocol
+final class NetworkService {
+    static let shared = NetworkService()
     private let decoder = JSONDecoder()
 
-    public init(networkProvider: NetworkProviderProtocol = URLSession.shared) {
-        self.networkProvider = networkProvider
-    }
+    private init() { }
 
-    public func request<T: Decodable>(endpoint: Endpoint, type: T.Type) async throws -> T? {
-        let request = try endpoint.makeURLRequest()
-        let (data, response) = try await networkProvider.data(for: request)
+    func request<T: Decodable>(endpoint: Endpoint, type: T.Type) async throws -> T? {
+        var request = try endpoint.makeURLRequest()
+        if endpoint.isAuthorized {
+            let accessToken = try TokenManager.shared.loadToken(tokenType: .accessToken)
+            request.headers["Authorization"] = "Bearer \(accessToken)"
+        }
+        let (data, response) = try await URLSession.shared.data(for: request)
 
         guard let httpResponse = response as? HTTPURLResponse
         else { throw NetworkError.invalidResponse }
diff --git a/Projects/Persistence/Sources/Keychain/KeychainStorage.swift b/Projects/DataSource/Sources/Persistence/KeychainStorage.swift
similarity index 71%
rename from Projects/Persistence/Sources/Keychain/KeychainStorage.swift
rename to Projects/DataSource/Sources/Persistence/KeychainStorage.swift
index 5e96be38..18c27ada 100644
--- a/Projects/Persistence/Sources/Keychain/KeychainStorage.swift
+++ b/Projects/DataSource/Sources/Persistence/KeychainStorage.swift
@@ -1,23 +1,19 @@
 //
 //  KeychainStorage.swift
-//  Persistence
+//  DataSource
 //
-//  Created by 반성준 on 6/21/25.
+//  Created by 최정인 on 7/26/25.
 //
 
-import DataSource
 import Foundation
 
-public final class KeychainStorage: KeychainStorageProtocol {
-    private let service: String
-    private let accessGroup: String?
+final class KeychainStorage {
+    static let shared = KeychainStorage()
+    private let service: String = Bundle.main.bundleIdentifier ?? "DefaultService"
 
-    public init(service: String? = nil, accessGroup: String? = nil) {
-        self.service = service ?? Bundle.main.bundleIdentifier ?? "DefaultService"
-        self.accessGroup = accessGroup
-    }
+    private init() { }
 
-    public func save(_ value: String, forKey key: String) -> Bool {
+    func save(_ value: String, forKey key: String) -> Bool {
         guard let data = value.data(using: .utf8) else {
             return false
         }
@@ -41,7 +37,7 @@ public final class KeychainStorage: KeychainStorageProtocol {
         return status == errSecSuccess
     }
 
-    public func load(forKey key: String) -> String? {
+    func load(forKey key: String) -> String? {
         var query = baseQuery(for: key)
         query[kSecReturnData as String] = kCFBooleanTrue
         query[kSecMatchLimit as String] = kSecMatchLimitOne
@@ -57,7 +53,7 @@ public final class KeychainStorage: KeychainStorageProtocol {
         return nil
     }
 
-    public func remove(forKey key: String) -> Bool {
+    func remove(forKey key: String) -> Bool {
         let query = baseQuery(for: key)
         let status = SecItemDelete(query as CFDictionary)
 
@@ -70,11 +66,6 @@ public final class KeychainStorage: KeychainStorageProtocol {
             kSecAttrService as String: service,
             kSecAttrAccount as String: key
         ]
-
-        if let accessGroup = accessGroup {
-            query[kSecAttrAccessGroup as String] = accessGroup
-        }
-
         return query
     }
 }
diff --git a/Projects/DataSource/Sources/Persistence/UserDefaultsStorage.swift b/Projects/DataSource/Sources/Persistence/UserDefaultsStorage.swift
new file mode 100644
index 00000000..4a71f985
--- /dev/null
+++ b/Projects/DataSource/Sources/Persistence/UserDefaultsStorage.swift
@@ -0,0 +1,29 @@
+//
+//  UserDefaultsStorage.swift
+//  DataSource
+//
+//  Created by 최정인 on 7/26/25.
+//
+
+import Foundation
+
+final class UserDefaultsStorage {
+    static let shared = UserDefaultsStorage()
+    private let userDefaults: UserDefaults = .standard
+
+    private init() { }
+
+    func save(_ value: Any?, forKey key: String) -> Bool {
+        userDefaults.set(value, forKey: key)
+        return userDefaults.object(forKey: key) != nil
+    }
+
+    func load<T>(forKey key: String) -> T? {
+        userDefaults.object(forKey: key) as? T
+    }
+
+    func remove(forKey key: String) -> Bool {
+        userDefaults.removeObject(forKey: key)
+        return userDefaults.object(forKey: key) == nil
+    }
+}
diff --git a/Projects/DataSource/Sources/Protocol/KeychainStorageProtocol.swift b/Projects/DataSource/Sources/Protocol/KeychainStorageProtocol.swift
deleted file mode 100644
index d95bf271..00000000
--- a/Projects/DataSource/Sources/Protocol/KeychainStorageProtocol.swift
+++ /dev/null
@@ -1,14 +0,0 @@
-//
-//  KeychainStorageProtocol.swift
-//  DataSource
-//
-//  Created by 반성준 on 6/21/25.
-//
-
-import Foundation
-
-public protocol KeychainStorageProtocol {
-    func save(_ value: String, forKey key: String) -> Bool
-    func load(forKey key: String) -> String?
-    func remove(forKey key: String) -> Bool
-}
diff --git a/Projects/DataSource/Sources/Protocol/NetworkServiceProtocol.swift b/Projects/DataSource/Sources/Protocol/NetworkServiceProtocol.swift
deleted file mode 100644
index b4f07c58..00000000
--- a/Projects/DataSource/Sources/Protocol/NetworkServiceProtocol.swift
+++ /dev/null
@@ -1,19 +0,0 @@
-//
-//  NetworkServiceProtocol.swift
-//  DataSource
-//
-//  Created by 최정인 on 6/20/25.
-//
-
-import Foundation
-
-public protocol NetworkServiceProtocol {
-    /// Endpoint로 비동기 네트워크 요청을 수행하고, 응답 데이터를 디코딩하여 반환합니다.
-    /// 네트워크 오류 또는 디코딩 오류가 발생한 경우, NetworkError를 throw 합니다.
-    ///
-    /// - Parameters:
-    ///   - endpoint: 요청을 보낼 API Endpoint 정보
-    ///   - type: 디코딩할 Response DTO 타입
-    /// - Returns: 응답 데이터를 디코딩한 객체
-    func request<T: Decodable>(endpoint: Endpoint, type: T.Type) async throws -> T?
-}
diff --git a/Projects/DataSource/Sources/Protocol/UserDefaultsStorageProtocol.swift b/Projects/DataSource/Sources/Protocol/UserDefaultsStorageProtocol.swift
deleted file mode 100644
index c7c26cd5..00000000
--- a/Projects/DataSource/Sources/Protocol/UserDefaultsStorageProtocol.swift
+++ /dev/null
@@ -1,14 +0,0 @@
-//
-//  UserDefaultsStorageProtocol.swift
-//  DataSource
-//
-//  Created by 반성준 on 6/25/25.
-//
-
-import Foundation
-
-public protocol UserDefaultsStorageProtocol {
-    func save(_ value: Any?, forKey key: String) -> Bool
-    func load<T>(forKey key: String) -> T?
-    func remove(forKey key: String) -> Bool
-}
diff --git a/Projects/DataSource/Sources/Repository/AuthRepository.swift b/Projects/DataSource/Sources/Repository/AuthRepository.swift
index ea88542c..e55a64e3 100644
--- a/Projects/DataSource/Sources/Repository/AuthRepository.swift
+++ b/Projects/DataSource/Sources/Repository/AuthRepository.swift
@@ -12,29 +12,26 @@ import KakaoSDKUser
 import KakaoSDKAuth
 
 final class AuthRepository: AuthRepositoryProtocol {
-    private let networkService: NetworkServiceProtocol
-    private let keychainStorage: KeychainStorageProtocol
-    private let userDefaultsStorage: UserDefaultsStorageProtocol
-
-    init(
-        networkService: NetworkServiceProtocol,
-        keychainStorage: KeychainStorageProtocol,
-        userDefaultsStorage: UserDefaultsStorageProtocol
-    ) {
-        self.networkService = networkService
-        self.keychainStorage = keychainStorage
-        self.userDefaultsStorage = userDefaultsStorage
-    }
+    private let networkService = NetworkService.shared
+    private let tokenManager = TokenManager.shared
+    private let userDefaultsStorage = UserDefaultsStorage.shared
 
+    // 카카오 로그인을 진행합니다.
     func kakaoLogin() async throws -> UserEntity {
         let accessToken = try await fetchKakaoToken()
+        let (nickname, profileImageUrl) = try await fetchKakaoUserInfo()
         let user = try await requestServerLogin(
             socialType: .kakao,
             nickname: nil,
             token: accessToken)
+
+        try saveNickname(nickname: nickname)
+        try saveSocialLoginType(socialLoginType: .kakao)
+        try saveUserProfileImageUrl(profileImageUrl: profileImageUrl)
         return user
     }
 
+    // 애플 로그인을 진행합니다.
     func appleLogin(nickname: String?, authToken: String) async throws -> UserEntity {
         var savedNickname: String = ""
         if let nickname {
@@ -47,48 +44,33 @@ final class AuthRepository: AuthRepositoryProtocol {
             socialType: .apple,
             nickname: savedNickname,
             token: authToken)
+
+        try saveSocialLoginType(socialLoginType: .apple)
         return user
     }
 
+    // 이용 약관 동의를 진행합니다.
     func submitAgreement(agreements: [TermsType : Bool]) async throws {
-        let accessToken = try loadToken(tokenType: .accessToken)
-        let endpoint = AuthEndpoint.agreements(accessToken: accessToken, agreements: agreements)
+        let endpoint = AuthEndpoint.agreements(agreements: agreements)
         _ = try await networkService.request(endpoint: endpoint, type: EmptyResponseDTO.self)
     }
 
+    // 로그아웃을 진행합니다.
     func logout() async throws {
-        let accessToken = try loadToken(tokenType: .accessToken)
-        let endpoint = AuthEndpoint.logout(accessToken: accessToken)
+        let endpoint = AuthEndpoint.logout
         _ = try await networkService.request(endpoint: endpoint, type: String.self)
-        try removeToken()
+        try tokenManager.removeToken()
     }
 
+    // 탈퇴하기를 진행합니다.
     func withdraw() async throws {
-        let accessToken = try loadToken(tokenType: .accessToken)
-        let endpoint = AuthEndpoint.withdraw(accessToken: accessToken)
+        let endpoint = AuthEndpoint.withdraw
         _ = try await networkService.request(endpoint: endpoint, type: String.self)
-        try removeToken()
-        try removeNickname()
-    }
-
-    func reissueToken() async throws {
-        let refreshToken = try loadToken(tokenType: .refreshToken)
-        let endpoint = AuthEndpoint.reissue(refreshToken: refreshToken)
-
-        guard let userResponse = try await networkService.request(endpoint: endpoint, type: LoginResponseDTO.self)
-        else { return }
-        let userEntity = userResponse.toUserEntity()
-
-        guard
-            saveToken(tokenType: .accessToken, token: userEntity.accessToken),
-            saveToken(tokenType: .refreshToken, token: userEntity.refreshToken)
-        else { throw AuthError.tokenSaveFailed }
-
-        BitnagilLogger.log(logType: .debug, message: "User Logined: \(userEntity.userState)")
-        BitnagilLogger.log(logType: .debug, message: "AccessToken Saved: \(userEntity.accessToken)")
-        BitnagilLogger.log(logType: .debug, message: "RefreshToken Saved: \(userEntity.refreshToken)")
+        try tokenManager.removeToken()
+        try removeUserInfo()
     }
 
+    // 카카오 SDK를 통해 카카오 authToken을 받아옵니다.
     private func fetchKakaoToken() async throws -> String {
         try await withCheckedThrowingContinuation { continuation in
             let resultHandler: (OAuthToken?, Error?) -> Void = { oauthToken, error in
@@ -111,6 +93,26 @@ final class AuthRepository: AuthRepositoryProtocol {
         }
     }
 
+    // 카카오 SDK를 통해 유저의 정보(카카오 닉네임, 프로필 이미지)를 받아옵니다.
+    private func fetchKakaoUserInfo() async throws -> (nickname: String, profileImageUrl: URL) {
+        try await withCheckedThrowingContinuation { continuation in
+            let resultHandler: (User?, Error?) -> Void = { user, error in
+                if let error {
+                    continuation.resume(throwing: AuthError.unknown(error))
+                } else if
+                    let nickname = user?.kakaoAccount?.profile?.nickname,
+                    let profileImageUrl = user?.kakaoAccount?.profile?.profileImageUrl {
+                    continuation.resume(returning: (nickname, profileImageUrl))
+                } else {
+                    continuation.resume(throwing: AuthError.kakaoUserInformationFetchFailed)
+                }
+            }
+
+            UserApi.shared.me(completion: resultHandler)
+        }
+    }
+
+    // 서버 로그인을 진행합니다.
     private func requestServerLogin(
         socialType: SocialLoginType,
         nickname: String?,
@@ -125,10 +127,8 @@ final class AuthRepository: AuthRepositoryProtocol {
         else { throw AuthError.invalidUserData }
 
         let userEntity = userResponse.toUserEntity()
-        guard
-            saveToken(tokenType: .accessToken, token: userEntity.accessToken),
-            saveToken(tokenType: .refreshToken, token: userEntity.refreshToken)
-        else { throw AuthError.tokenSaveFailed }
+        try tokenManager.saveToken(token: userEntity.accessToken, tokenType: .accessToken)
+        try tokenManager.saveToken(token: userEntity.refreshToken, tokenType: .refreshToken)
 
         BitnagilLogger.log(logType: .debug, message: "User Logined: \(userEntity.userState)")
         BitnagilLogger.log(logType: .debug, message: "AccessToken Saved: \(userEntity.accessToken)")
@@ -137,41 +137,48 @@ final class AuthRepository: AuthRepositoryProtocol {
         return userEntity
     }
 
-    private func saveToken(tokenType: TokenType, token: String) -> Bool {
-        return keychainStorage.save(token, forKey: tokenType.rawValue)
-    }
-
-    private func loadToken(tokenType: TokenType) throws -> String {
-        guard let token = keychainStorage.load(forKey: tokenType.rawValue) else {
-            throw AuthError.tokenLoadFailed
-        }
-        return token
-    }
-
-    private func removeToken() throws {
-        guard
-            keychainStorage.remove(forKey: TokenType.accessToken.rawValue),
-            keychainStorage.remove(forKey: TokenType.refreshToken.rawValue)
-        else { throw AuthError.tokenRemoveFailed }
-    }
-
+    // UserDefaults에 닉네임을 저장합니다.
     private func saveNickname(nickname: String) throws {
         guard userDefaultsStorage.save(nickname, forKey: UserDefaultsKey.nickname.rawValue) else {
-            throw AuthError.nicknameSaveFailed
+            throw UserError.nicknameSaveFailed
         }
     }
 
+    // UserDefaults에 저장된 닉네임을 불러옵니다.
     private func loadNickname() throws -> String {
         let nickname: String? = userDefaultsStorage.load(forKey: UserDefaultsKey.nickname.rawValue)
         guard let nickname else {
-            throw AuthError.nicknameLoadFailed
+            throw UserError.nicknameLoadFailed
         }
         return nickname
     }
 
-    private func removeNickname() throws {
+    // UserDefaults에 소셜 로그인 타입을 저장합니다.
+    private func saveSocialLoginType(socialLoginType: SocialLoginType) throws {
+        guard userDefaultsStorage.save(socialLoginType.rawValue, forKey: UserDefaultsKey.socialLoginType.rawValue) else {
+            throw UserError.socialLoginTypeSaveFailed
+        }
+    }
+
+    // UserDefaults에 프로필 이미지를 저장합니다.
+    private func saveUserProfileImageUrl(profileImageUrl: URL) throws {
+        guard userDefaultsStorage.save(profileImageUrl.absoluteString, forKey: UserDefaultsKey.profileImageUrl.rawValue) else {
+            throw UserError.profileImageUrlSaveFailed
+        }
+    }
+
+    // UserDefaults에 저장된 유저 정보(닉네임, 소셜 로그인 타입, 프로필 이미지)를 삭제합니다.
+    private func removeUserInfo() throws {
         guard userDefaultsStorage.remove(forKey: UserDefaultsKey.nickname.rawValue) else {
-            throw AuthError.nicknameRemoveFailed
+            throw UserError.nicknameRemoveFailed
+        }
+
+        guard userDefaultsStorage.remove(forKey: UserDefaultsKey.socialLoginType.rawValue) else {
+            throw UserError.socialLoginTypeRemoveFailed
+        }
+
+        guard userDefaultsStorage.remove(forKey: UserDefaultsKey.profileImageUrl.rawValue) else {
+            throw UserError.profileImageUrlRemoveFailed
         }
     }
 }
diff --git a/Projects/DataSource/Sources/Repository/OnboardingRepository.swift b/Projects/DataSource/Sources/Repository/OnboardingRepository.swift
index 1f1ebe03..b53a9c98 100644
--- a/Projects/DataSource/Sources/Repository/OnboardingRepository.swift
+++ b/Projects/DataSource/Sources/Repository/OnboardingRepository.swift
@@ -8,18 +8,10 @@
 import Domain
 
 final class OnboardingRepository: OnboardingRepositoryProtocol {
-    private let networkService: NetworkServiceProtocol
-    private let keychainStorage: KeychainStorageProtocol
-
-    init(networkService: NetworkServiceProtocol, keychainStorage: KeychainStorageProtocol) {
-        self.networkService = networkService
-        self.keychainStorage = keychainStorage
-    }
+    private let networkService = NetworkService.shared
 
     func registerOnboarding(onboardingChoices: [String : String]) async throws -> [RecommendedRoutineEntity] {
-        let accessToken = try loadToken(tokenType: .accessToken)
-        let endpoint = OnboardingEndpoint.registerOnboarding(accessToken: accessToken, choices: onboardingChoices)
-
+        let endpoint = OnboardingEndpoint.registerOnboarding(choices: onboardingChoices)
         guard let response = try await networkService.request(endpoint: endpoint, type: RecommendedRoutineListResponseDTO.self)
         else { return [] }
 
@@ -28,15 +20,7 @@ final class OnboardingRepository: OnboardingRepositoryProtocol {
     }
 
     func registerRecommendedRoutines(selectedRoutines: [Int]) async throws {
-        let accessToken = try loadToken(tokenType: .accessToken)
-        let endpoint = OnboardingEndpoint.registerRecommendedRoutine(accessToken: accessToken, selectedRoutines: selectedRoutines)
+        let endpoint = OnboardingEndpoint.registerRecommendedRoutine(selectedRoutines: selectedRoutines)
         _ = try await networkService.request(endpoint: endpoint, type: EmptyResponseDTO.self)
     }
-
-    private func loadToken(tokenType: TokenType) throws -> String {
-        guard let token = keychainStorage.load(forKey: tokenType.rawValue) else {
-            throw AuthError.tokenLoadFailed
-        }
-        return token
-    }
 }
diff --git a/Projects/DataSource/Sources/Repository/UserDataRepository.swift b/Projects/DataSource/Sources/Repository/UserDataRepository.swift
index 1eb3d511..7d037b78 100644
--- a/Projects/DataSource/Sources/Repository/UserDataRepository.swift
+++ b/Projects/DataSource/Sources/Repository/UserDataRepository.swift
@@ -7,31 +7,41 @@
 
 import Domain
 import Foundation
+import Shared
 
 final class UserDataRepository: UserDataRepositoryProtocol {
-    private let keychainStorage: KeychainStorageProtocol
-    private let userDefaultsStorage: UserDefaultsStorageProtocol
+    private let networkService = NetworkService.shared
+    private let userDefaultsStorage = UserDefaultsStorage.shared
+    private let tokenManager = TokenManager.shared
 
-    init(keychainStorage: KeychainStorageProtocol, userDefaultsStorage: UserDefaultsStorageProtocol) {
-        self.keychainStorage = keychainStorage
-        self.userDefaultsStorage = userDefaultsStorage
-    }
-
-    // TODO: - accessToken fetch 로직 상의 후 결정
-    func loadAccessToken() throws -> String {
-        guard let token = keychainStorage.load(forKey: TokenType.accessToken.rawValue) else {
-            throw UserError.accessTokenLoadFailed
-        }
-
-        return token
-    }
-    
     func loadNickname() throws -> String {
+        // TODO: 서버에서 닉넴 보내준대요
         guard let nickname: String = userDefaultsStorage.load(forKey: UserDefaultsKey.nickname.rawValue) else {
             throw UserError.nicknameLoadFailed
         }
 
         return nickname
     }
+
+    func reissueToken() async -> Bool {
+        do {
+            let refreshToken = try tokenManager.loadToken(tokenType: .refreshToken)
+            let endpoint = AuthEndpoint.reissue(refreshToken: refreshToken)
+
+            guard let tokenResponse = try await networkService.request(endpoint: endpoint, type: TokenResponseDTO.self)
+            else { return false }
+
+            try tokenManager.saveToken(token: tokenResponse.accessToken, tokenType: .accessToken)
+            try tokenManager.saveToken(token: tokenResponse.refreshToken, tokenType: .refreshToken)
+
+            BitnagilLogger.log(logType: .debug, message: "AccessToken Saved: \(tokenResponse.accessToken)")
+            BitnagilLogger.log(logType: .debug, message: "RefreshToken Saved: \(tokenResponse.refreshToken)")
+
+            return true
+        } catch {
+            BitnagilLogger.log(logType: .error, message: "\(error.localizedDescription)")
+            return false
+        }
+    }
 }
 
diff --git a/Projects/Domain/Sources/Entity/Enum/OnboardingChoiceType.swift b/Projects/Domain/Sources/Entity/Enum/OnboardingChoiceType.swift
index ca6f3185..1774043b 100644
--- a/Projects/Domain/Sources/Entity/Enum/OnboardingChoiceType.swift
+++ b/Projects/Domain/Sources/Entity/Enum/OnboardingChoiceType.swift
@@ -50,23 +50,23 @@ public enum OnboardingChoiceType: CaseIterable {
 
     var value: String {
         switch self {
-        case .morningTime: "MORNING"
-        case .eveningTime: "EVENING"
-        case .allTime: "NOTHING"
+        case .morningTime: "08:00:00"
+        case .eveningTime: "20:00:00"
+        case .allTime: "00:00:00"
 
-        case .never: "ZERO_PER_WEEK"
-        case .rarely: "ONE_TO_TWO_PER_WEEK"
-        case .sometimes: "THREE_TO_FOUR_PER_WEEK"
-        case .often: "MORE_THAN_FIVE_PER_WEEK"
+        case .never: "NEVER"
+        case .rarely: "SHORT"
+        case .sometimes: "SOMETIMES"
+        case .often: "OFTEN"
 
         case .stability: "STABILITY"
         case .connection: "CONNECTEDNESS"
         case .growth: "GROWTH"
         case .vitality: "VITALITY"
 
-        case .once: "ONE_TO_TWO_PER_WEEK"
-        case .twoToThree: "THREE_TO_FOUR_PER_WEEK"
-        case .fourOrMore: "MORE_THAN_FIVE_PER_WEEK"
+        case .once: "ONE_PER_WEEK"
+        case .twoToThree: "TWO_TO_THREE_PER_WEEK"
+        case .fourOrMore: "MORE_THAN_FOUR_PER_WEEK"
         case .notSure: "UNKNOWN"
         }
     }
diff --git a/Projects/Domain/Sources/Protocol/Repository/AuthRepositoryProtocol.swift b/Projects/Domain/Sources/Protocol/Repository/AuthRepositoryProtocol.swift
index f0eaba41..212044b2 100644
--- a/Projects/Domain/Sources/Protocol/Repository/AuthRepositoryProtocol.swift
+++ b/Projects/Domain/Sources/Protocol/Repository/AuthRepositoryProtocol.swift
@@ -25,7 +25,4 @@ public protocol AuthRepositoryProtocol {
 
     /// 계정 탈퇴를 진행합니다.
     func withdraw() async throws
-
-    /// 토큰 재발급을 진행합니다.
-    func reissueToken() async throws
 }
diff --git a/Projects/Domain/Sources/Protocol/Repository/UserDataRepositoryProtocol.swift b/Projects/Domain/Sources/Protocol/Repository/UserDataRepositoryProtocol.swift
index 99f37db7..90229f6c 100644
--- a/Projects/Domain/Sources/Protocol/Repository/UserDataRepositoryProtocol.swift
+++ b/Projects/Domain/Sources/Protocol/Repository/UserDataRepositoryProtocol.swift
@@ -5,13 +5,12 @@
 //  Created by 이동현 on 7/20/25.
 //
 
-/// 유저의 이름, 토큰 등 유저 정보와 관련된 데이터를 가져오는 Repository
+/// 유저의 이름 등 유저 정보와 관련된 데이터를 가져오는 Repository
 public protocol UserDataRepositoryProtocol {
-    /// 저장한 accessToken을 가져옵니다.
-    /// - Returns: accessToken
-    func loadAccessToken() throws -> String
-
     /// 저장한 닉네임을 가져옵니다.
     /// - Returns: 유저 닉네임
     func loadNickname() throws -> String
+
+    /// 토큰 재발급을 진행합니다.
+    func reissueToken() async -> Bool
 }
diff --git a/Projects/Domain/Sources/Protocol/UseCase/LogoutUseCaseProtocol.swift b/Projects/Domain/Sources/Protocol/UseCase/LogoutUseCaseProtocol.swift
index 31277830..2e655857 100644
--- a/Projects/Domain/Sources/Protocol/UseCase/LogoutUseCaseProtocol.swift
+++ b/Projects/Domain/Sources/Protocol/UseCase/LogoutUseCaseProtocol.swift
@@ -8,8 +8,4 @@
 public protocol LogoutUseCaseProtocol {
     /// 로그아웃을 진행합니다.
     func logout() async throws
-
-    // TODO: 추후 reissue 어디로 가야 하나 ..
-    /// 토큰 재발급을 진행합니다.
-    func reissueToken() async throws
 }
diff --git a/Projects/Domain/Sources/UseCase/Auth/LogoutUseCase.swift b/Projects/Domain/Sources/UseCase/Auth/LogoutUseCase.swift
index ca3b4b1b..d0429a40 100644
--- a/Projects/Domain/Sources/UseCase/Auth/LogoutUseCase.swift
+++ b/Projects/Domain/Sources/UseCase/Auth/LogoutUseCase.swift
@@ -15,8 +15,4 @@ public final class LogoutUseCase: LogoutUseCaseProtocol {
     public func logout() async throws {
         try await authRepository.logout()
     }
-
-    public func reissueToken() async throws {
-        try await authRepository.reissueToken()
-    }
 }
diff --git a/Projects/NetworkService/Project.swift b/Projects/NetworkService/Project.swift
deleted file mode 100644
index 0d090980..00000000
--- a/Projects/NetworkService/Project.swift
+++ /dev/null
@@ -1,20 +0,0 @@
-import ProjectDescription
-
-let project = Project(
-    name: "NetworkService",
-    targets: [
-        .target(
-            name: "NetworkService",
-            destinations: .iOS,
-            product: .staticFramework,
-            bundleId: "com.bitnagil.networkservice",
-            deploymentTargets: .iOS("15.0"),
-            sources: ["Sources/**"],
-            resources: [],
-            dependencies: [
-                .project(target: "DataSource", path: "../DataSource"),
-                .project(target: "Shared", path: "../Shared")
-            ]
-        )
-    ]
-)
diff --git a/Projects/NetworkService/Sources/Extension/URLSession+.swift b/Projects/NetworkService/Sources/Extension/URLSession+.swift
deleted file mode 100644
index e1fea3c7..00000000
--- a/Projects/NetworkService/Sources/Extension/URLSession+.swift
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-//  URLSession+.swift
-//  NetworkService
-//
-//  Created by 최정인 on 6/27/25.
-//
-
-import Foundation
-
-extension URLSession: NetworkProviderProtocol { }
diff --git a/Projects/NetworkService/Sources/NetworkDependencyAssembler.swift b/Projects/NetworkService/Sources/NetworkDependencyAssembler.swift
deleted file mode 100644
index cea229ad..00000000
--- a/Projects/NetworkService/Sources/NetworkDependencyAssembler.swift
+++ /dev/null
@@ -1,20 +0,0 @@
-//
-//  NetworkDependencyAssembler.swift
-//  NetworkService
-//
-//  Created by 최정인 on 6/26/25.
-//
-
-import DataSource
-import Shared
-
-public struct NetworkDependencyAssembler: DependencyAssemblerProtocol {
-
-    public init() { }
-
-    public func assemble() {
-        DIContainer.shared.register(type: NetworkServiceProtocol.self) { _ in
-            return NetworkService()
-        }
-    }
-}
diff --git a/Projects/NetworkService/Sources/NetworkProviderProtocol.swift b/Projects/NetworkService/Sources/NetworkProviderProtocol.swift
deleted file mode 100644
index a6b19542..00000000
--- a/Projects/NetworkService/Sources/NetworkProviderProtocol.swift
+++ /dev/null
@@ -1,12 +0,0 @@
-//
-//  NetworkProviderProtocol.swift
-//  NetworkService
-//
-//  Created by 최정인 on 6/27/25.
-//
-
-import Foundation
-
-public protocol NetworkProviderProtocol {
-    func data(for urlRequest: URLRequest) async throws -> (Data, URLResponse)
-}
diff --git a/Projects/Persistence/Project.swift b/Projects/Persistence/Project.swift
deleted file mode 100644
index 6e48f674..00000000
--- a/Projects/Persistence/Project.swift
+++ /dev/null
@@ -1,19 +0,0 @@
-import ProjectDescription
-
-let project = Project(
-    name: "Persistence",
-    targets: [
-        .target(
-            name: "Persistence",
-            destinations: .iOS,
-            product: .staticFramework,
-            bundleId: "com.bitnagil.persistence",
-            deploymentTargets: .iOS("15.0"),
-            sources: ["Sources/**"],
-            dependencies: [
-                .project(target: "DataSource", path: "../DataSource"),
-                .project(target: "Shared", path: "../Shared")
-            ]
-        )
-    ]
-)
diff --git a/Projects/Persistence/Sources/PersistenceDependencyAssembler.swift b/Projects/Persistence/Sources/PersistenceDependencyAssembler.swift
deleted file mode 100644
index ac630835..00000000
--- a/Projects/Persistence/Sources/PersistenceDependencyAssembler.swift
+++ /dev/null
@@ -1,24 +0,0 @@
-//
-//  PersistenceDependencyAssembler.swift
-//  Persistence
-//
-//  Created by 최정인 on 6/26/25.
-//
-
-import DataSource
-import Shared
-
-public struct PersistenceDependencyAssembler: DependencyAssemblerProtocol {
-
-    public init() { }
-
-    public func assemble() {
-        DIContainer.shared.register(type: KeychainStorageProtocol.self) { _ in
-            return KeychainStorage()
-        }
-
-        DIContainer.shared.register(type: UserDefaultsStorageProtocol.self) { _ in
-            return UserDefaultsStorage()
-        }
-    }
-}
diff --git a/Projects/Persistence/Sources/UserDefaults/UserDefaultsStorage.swift b/Projects/Persistence/Sources/UserDefaults/UserDefaultsStorage.swift
deleted file mode 100644
index 0b306071..00000000
--- a/Projects/Persistence/Sources/UserDefaults/UserDefaultsStorage.swift
+++ /dev/null
@@ -1,31 +0,0 @@
-//
-//  UserDefaultsStorage.swift
-//  Persistence
-//
-//  Created by 반성준 on 6/23/25.
-//
-
-import DataSource
-import Foundation
-
-public final class UserDefaultsStorage: UserDefaultsStorageProtocol {
-    private let userDefaults: UserDefaults
-
-    public init(userDefaults: UserDefaults = .standard) {
-        self.userDefaults = userDefaults
-    }
-
-    public func save(_ value: Any?, forKey key: String) -> Bool {
-        userDefaults.set(value, forKey: key)
-        return userDefaults.object(forKey: key) != nil
-    }
-
-    public func load<T>(forKey key: String) -> T? {
-        userDefaults.object(forKey: key) as? T
-    }
-
-    public func remove(forKey key: String) -> Bool {
-        userDefaults.removeObject(forKey: key)
-        return userDefaults.object(forKey: key) == nil
-    }
-}
diff --git a/Projects/Presentation/Project.swift b/Projects/Presentation/Project.swift
index 587a5d61..c85074f1 100644
--- a/Projects/Presentation/Project.swift
+++ b/Projects/Presentation/Project.swift
@@ -13,7 +13,6 @@ let project = Project(
             resources: ["Resources/**"],
             dependencies: [
                 .external(name: "SnapKit"),
-                .external(name: "Then"),
                 .project(target: "Domain", path: "../Domain"),
                 .project(target: "Shared", path: "../Shared")
             ]
diff --git a/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/Contents.json b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/Contents.json
new file mode 100644
index 00000000..b561e6e8
--- /dev/null
+++ b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/Contents.json
@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "IntroGraphic.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "IntroGraphic@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "IntroGraphic@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic.png b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic.png
new file mode 100644
index 00000000..d44604fd
Binary files /dev/null and b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic.png differ
diff --git a/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@2x.png b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@2x.png
new file mode 100644
index 00000000..44035d41
Binary files /dev/null and b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@2x.png differ
diff --git a/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@3x.png b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@3x.png
new file mode 100644
index 00000000..ac0d6da8
Binary files /dev/null and b/Projects/Presentation/Resources/Images.xcassets/IntroGraphic.imageset/IntroGraphic@3x.png differ
diff --git a/Projects/Presentation/Sources/Common/Component/CustomBottomSheet.swift b/Projects/Presentation/Sources/Common/Component/CustomBottomSheet.swift
index 2ba4ade5..939d0610 100644
--- a/Projects/Presentation/Sources/Common/Component/CustomBottomSheet.swift
+++ b/Projects/Presentation/Sources/Common/Component/CustomBottomSheet.swift
@@ -54,25 +54,17 @@ final class CustomBottomSheet: UIViewController {
     }
 
     private func configureAttribute() {
-        dimmedView.do {
-            $0.backgroundColor = UIColor.black.withAlphaComponent(0.7)
-            $0.alpha = 0
-        }
+        dimmedView.backgroundColor = UIColor.black.withAlphaComponent(0.7)
+        dimmedView.alpha = 0
 
-        bottomSheetView.do {
-            $0.backgroundColor = UIColor.systemBackground
-            $0.layer.cornerRadius = Layout.bottomSheetCornerRadius
-            $0.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
-        }
+        bottomSheetView.backgroundColor = UIColor.systemBackground
+        bottomSheetView.layer.cornerRadius = Layout.bottomSheetCornerRadius
+        bottomSheetView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
 
-        dragHandle.do {
-            $0.backgroundColor = UIColor.systemGray4
-            $0.layer.cornerRadius = Layout.dragHandleCornerRadius
-        }
-        
-        contentView.do {
-            $0.backgroundColor = .clear
-        }
+        dragHandle.backgroundColor = UIColor.systemGray4
+        dragHandle.layer.cornerRadius = Layout.dragHandleCornerRadius
+
+        contentView.backgroundColor = .clear
 
         let tapGesture = UITapGestureRecognizer(target: self, action: #selector(dismissBottomSheet))
         dimmedView.addGestureRecognizer(tapGesture)
diff --git a/Projects/Presentation/Sources/Common/DesignSystem/BitnagilGraphic.swift b/Projects/Presentation/Sources/Common/DesignSystem/BitnagilGraphic.swift
new file mode 100644
index 00000000..3f6e3ee4
--- /dev/null
+++ b/Projects/Presentation/Sources/Common/DesignSystem/BitnagilGraphic.swift
@@ -0,0 +1,16 @@
+//
+//  BitnagilGraphic.swift
+//  Presentation
+//
+//  Created by 최정인 on 7/27/25.
+//
+
+import UIKit
+
+enum BitnagilGraphic {
+    private static var bundle: Bundle {
+        return Bundle(for: IntroView.self)
+    }
+    
+    static let introGraphic = UIImage(named: "IntroGraphic", in: bundle, with: nil)
+}
diff --git a/Projects/Presentation/Sources/Common/SplashView.swift b/Projects/Presentation/Sources/Common/SplashView.swift
new file mode 100644
index 00000000..2d4878fd
--- /dev/null
+++ b/Projects/Presentation/Sources/Common/SplashView.swift
@@ -0,0 +1,33 @@
+//
+//  SplashView.swift
+//  Presentation
+//
+//  Created by 최정인 on 7/27/25.
+//
+
+import SnapKit
+import UIKit
+
+public final class SplashView: UIViewController {
+
+    private let splashGraphicView = UIImageView()
+
+    override public func viewDidLoad() {
+        super.viewDidLoad()
+        configureAttribute()
+        configureLayout()
+    }
+
+    private func configureAttribute() {
+        splashGraphicView.image = BitnagilGraphic.introGraphic
+    }
+
+    private func configureLayout() {
+        view.backgroundColor = .systemBackground
+        view.addSubview(splashGraphicView)
+
+        splashGraphicView.snp.makeConstraints { make in
+            make.center.equalToSuperview()
+        }
+    }
+}
diff --git a/Projects/Presentation/Sources/Home/View/HomeView.swift b/Projects/Presentation/Sources/Home/View/HomeView.swift
index 90411d0f..3ff73a55 100644
--- a/Projects/Presentation/Sources/Home/View/HomeView.swift
+++ b/Projects/Presentation/Sources/Home/View/HomeView.swift
@@ -8,7 +8,6 @@
 import Combine
 import Shared
 import SnapKit
-import Then
 import UIKit
 
 final class HomeView: BaseViewController<HomeViewModel> {
diff --git a/Projects/Presentation/Sources/Login/View/Component/SocialLoginButton.swift b/Projects/Presentation/Sources/Login/View/Component/SocialLoginButton.swift
index 826512b8..7febadbb 100644
--- a/Projects/Presentation/Sources/Login/View/Component/SocialLoginButton.swift
+++ b/Projects/Presentation/Sources/Login/View/Component/SocialLoginButton.swift
@@ -69,23 +69,17 @@ final class SocialLoginButton: UIButton {
         backgroundColor = socialType.buttonColor
         layer.cornerRadius = Layout.cornerRadius
 
-        stackView.do {
-            $0.axis = .horizontal
-            $0.alignment = .center
-            $0.spacing = Layout.stackViewSpacing
-            $0.isUserInteractionEnabled = false
-        }
+        stackView.axis = .horizontal
+        stackView.alignment = .center
+        stackView.spacing = Layout.stackViewSpacing
+        stackView.isUserInteractionEnabled = false
 
-        iconImageView.do {
-            $0.image = socialType.iconImage
-            $0.contentMode = .scaleAspectFit
-        }
+        iconImageView.image = socialType.iconImage
+        iconImageView.contentMode = .scaleAspectFit
 
-        buttonLabel.do {
-            $0.text = socialType.buttonTitle
-            $0.textColor = socialType.buttonTextColor
-            $0.font = BitnagilFont(style: .button2, weight: .semiBold).font
-        }
+        buttonLabel.text = socialType.buttonTitle
+        buttonLabel.textColor = socialType.buttonTextColor
+        buttonLabel.font = BitnagilFont(style: .button2, weight: .semiBold).font
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/Login/View/Component/TermsAgreementItemView.swift b/Projects/Presentation/Sources/Login/View/Component/TermsAgreementItemView.swift
index e2d56814..da572b5a 100644
--- a/Projects/Presentation/Sources/Login/View/Component/TermsAgreementItemView.swift
+++ b/Projects/Presentation/Sources/Login/View/Component/TermsAgreementItemView.swift
@@ -47,31 +47,25 @@ final class TermsAgreementItemView: UIView {
     }
 
     private func configureAttribute() {
-        checkButton.do {
-            $0.setImage(BitnagilIcon.checkIcon, for: .normal)
-            $0.tintColor = BitnagilColor.navy100
-            $0.addAction(UIAction { [weak self] _ in
-                guard let self else { return }
-                self.isAgreed.toggle()
-                self.delegate?.termsAgreementItemView(self, didToggleCheckFor: self.termType)
-            }, for: .touchUpInside)
-        }
-
-        agreementLable.do {
-            $0.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: termType.title)
-            $0.textColor = BitnagilColor.gray50
-        }
-
-        moreButton.do {
-            let title = BitnagilFont(style: .captionUnderline1, weight: .semiBold).attributedString(text: "더보기")
-            $0.setAttributedTitle(title, for: .normal)
-            $0.setTitleColor(BitnagilColor.gray50, for: .normal)
-            $0.isHidden = termType.link == nil
-            $0.addAction(UIAction { [weak self] _ in
-                guard let self else { return }
-                self.delegate?.termsAgreementItemView(self, didTapMoreButtonFor: self.termType)
-            }, for: .touchUpInside)
-        }
+        checkButton.setImage(BitnagilIcon.checkIcon, for: .normal)
+        checkButton.tintColor = BitnagilColor.navy100
+        checkButton.addAction(UIAction { [weak self] _ in
+            guard let self else { return }
+            self.isAgreed.toggle()
+            self.delegate?.termsAgreementItemView(self, didToggleCheckFor: self.termType)
+        }, for: .touchUpInside)
+
+        agreementLable.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: termType.title)
+        agreementLable.textColor = BitnagilColor.gray50
+
+        let title = BitnagilFont(style: .captionUnderline1, weight: .semiBold).attributedString(text: "더보기")
+        moreButton.setAttributedTitle(title, for: .normal)
+        moreButton.setTitleColor(BitnagilColor.gray50, for: .normal)
+        moreButton.isHidden = termType.link == nil
+        moreButton.addAction(UIAction { [weak self] _ in
+            guard let self else { return }
+            self.delegate?.termsAgreementItemView(self, didTapMoreButtonFor: self.termType)
+        }, for: .touchUpInside)
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/Login/View/Component/TotalAgreementButton.swift b/Projects/Presentation/Sources/Login/View/Component/TotalAgreementButton.swift
index d41a1c53..f00eed74 100644
--- a/Projects/Presentation/Sources/Login/View/Component/TotalAgreementButton.swift
+++ b/Projects/Presentation/Sources/Login/View/Component/TotalAgreementButton.swift
@@ -41,24 +41,18 @@ final class TotalAgreementButton: UIButton {
         backgroundColor = BitnagilColor.gray99
         layer.cornerRadius = Layout.cornerRadius
 
-        stackView.do {
-            $0.axis = .horizontal
-            $0.alignment = .center
-            $0.spacing = Layout.stackViewSpacing
-            $0.isUserInteractionEnabled = false
-        }
-
-        checkButton.do {
-            $0.image = BitnagilIcon.checkIcon
-            $0.tintColor = BitnagilColor.navy100
-            $0.contentMode = .scaleAspectFit
-        }
-
-        buttonLabel.do {
-            $0.text = "전체동의"
-            $0.textColor = BitnagilColor.gray50
-            $0.font = BitnagilFont(style: .subtitle1, weight: .semiBold).font
-        }
+        stackView.axis = .horizontal
+        stackView.alignment = .center
+        stackView.spacing = Layout.stackViewSpacing
+        stackView.isUserInteractionEnabled = false
+
+        checkButton.image = BitnagilIcon.checkIcon
+        checkButton.tintColor = BitnagilColor.navy100
+        checkButton.contentMode = .scaleAspectFit
+
+        buttonLabel.text = "전체동의"
+        buttonLabel.textColor = BitnagilColor.gray50
+        buttonLabel.font = BitnagilFont(style: .subtitle1, weight: .semiBold).font
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/Login/View/IntroView.swift b/Projects/Presentation/Sources/Login/View/IntroView.swift
index 1d54fe16..6ac31676 100644
--- a/Projects/Presentation/Sources/Login/View/IntroView.swift
+++ b/Projects/Presentation/Sources/Login/View/IntroView.swift
@@ -7,7 +7,6 @@
 
 import Shared
 import SnapKit
-import Then
 import UIKit
 
 public final class IntroView: UIViewController {
@@ -15,14 +14,16 @@ public final class IntroView: UIViewController {
     private enum Layout {
         static let horizontalMargin: CGFloat = 20
         static let labelTopSpacing: CGFloat = 54
-        static let graphViewTopSpacing: CGFloat = 38
+        static let graphViewTopSpacing: CGFloat = 118
         static let graphViewBottomSpacing: CGFloat = 64
+        static let graphViewHeight: CGFloat = 295
+        static let graphViewWidth: CGFloat = 257
         static let startButtonBottomSpacing: CGFloat = 20
         static let startButtonHeight: CGFloat = 54
     }
 
     private let introLabel = UILabel()
-    private let graphView = UIView()
+    private let graphView = UIImageView()
     private let startButton = PrimaryButton(buttonState: .default, buttonTitle: "시작하기")
 
     public override func viewDidLoad() {
@@ -37,17 +38,13 @@ public final class IntroView: UIViewController {
     }
 
     private func configureAttribute() {
-        introLabel.do {
-            let text = "당신의 하루 리듬을 이해하고,\n작은 변화를 함께 시작해볼게요."
-            $0.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
-            $0.textAlignment = .center
-            $0.textColor = BitnagilColor.navy500
-            $0.numberOfLines = 2
-        }
+        let text = "당신의 하루 리듬을 이해하고,\n작은 변화를 함께 시작해볼게요."
+        introLabel.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
+        introLabel.textAlignment = .center
+        introLabel.textColor = BitnagilColor.navy500
+        introLabel.numberOfLines = 2
 
-        graphView.do {
-            $0.backgroundColor = BitnagilColor.gray90
-        }
+        graphView.image = BitnagilGraphic.introGraphic
 
         startButton.addAction(UIAction { [weak self] _ in
             guard let loginViewModel = DIContainer.shared.resolve(type: LoginViewModel.self) else {
@@ -70,13 +67,14 @@ public final class IntroView: UIViewController {
             make.leading.equalTo(safeArea).offset(Layout.horizontalMargin)
             make.trailing.equalTo(safeArea).inset(Layout.horizontalMargin)
             make.top.equalTo(safeArea).offset(Layout.labelTopSpacing)
+            make.height.equalTo(60)
         }
 
         graphView.snp.makeConstraints { make in
-            make.leading.equalTo(safeArea).offset(Layout.horizontalMargin)
-            make.trailing.equalTo(safeArea).inset(Layout.horizontalMargin)
             make.top.equalTo(introLabel.snp.bottom).offset(Layout.graphViewTopSpacing)
-            make.bottom.equalTo(startButton.snp.top).offset(-Layout.graphViewBottomSpacing)
+            make.bottom.equalTo(startButton.snp.top).offset(-133)
+            make.leading.equalTo(safeArea).offset(53)
+            make.trailing.equalTo(safeArea).inset(65)
         }
 
         startButton.snp.makeConstraints { make in
diff --git a/Projects/Presentation/Sources/Login/View/LoginView.swift b/Projects/Presentation/Sources/Login/View/LoginView.swift
index 56b0ad39..fbac8fdb 100644
--- a/Projects/Presentation/Sources/Login/View/LoginView.swift
+++ b/Projects/Presentation/Sources/Login/View/LoginView.swift
@@ -9,7 +9,6 @@ import AuthenticationServices
 import Combine
 import Shared
 import SnapKit
-import Then
 import UIKit
 
 final class LoginView: BaseViewController<LoginViewModel> {
@@ -47,9 +46,7 @@ final class LoginView: BaseViewController<LoginViewModel> {
     }
 
     override func configureAttribute() {
-        logoView.do {
-            $0.backgroundColor = BitnagilColor.gray90
-        }
+        logoView.backgroundColor = BitnagilColor.gray90
 
         kakaoLoginButton.addAction(UIAction { [weak self] _ in
             self?.viewModel.action(input: .kakaoLogin)
diff --git a/Projects/Presentation/Sources/Login/View/TermsAgreementView.swift b/Projects/Presentation/Sources/Login/View/TermsAgreementView.swift
index 9797981d..62bf0b77 100644
--- a/Projects/Presentation/Sources/Login/View/TermsAgreementView.swift
+++ b/Projects/Presentation/Sources/Login/View/TermsAgreementView.swift
@@ -10,7 +10,6 @@ import Domain
 import SafariServices
 import Shared
 import SnapKit
-import Then
 import UIKit
 
 final class TermsAgreementView: BaseViewController<LoginViewModel> {
@@ -51,13 +50,11 @@ final class TermsAgreementView: BaseViewController<LoginViewModel> {
     }
 
     override func configureAttribute() {
-        agreementLabel.do {
-            let text = "빛나길 이용을 위해\n필수 약관에 동의해 주세요."
-            $0.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
-            $0.textAlignment = .left
-            $0.numberOfLines = 2
-            $0.textColor = BitnagilColor.navy500
-        }
+        let text = "빛나길 이용을 위해\n필수 약관에 동의해 주세요."
+        agreementLabel.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
+        agreementLabel.textAlignment = .left
+        agreementLabel.numberOfLines = 2
+        agreementLabel.textColor = BitnagilColor.navy500
 
         totalAgreementButton.addAction(UIAction { [weak self] _ in
             self?.viewModel.action(input: .toggleTotalAgreement)
diff --git a/Projects/Presentation/Sources/Onboarding/View/Component/OnboardingChoiceButton.swift b/Projects/Presentation/Sources/Onboarding/View/Component/OnboardingChoiceButton.swift
index 4a8ce792..8eb411f3 100644
--- a/Projects/Presentation/Sources/Onboarding/View/Component/OnboardingChoiceButton.swift
+++ b/Projects/Presentation/Sources/Onboarding/View/Component/OnboardingChoiceButton.swift
@@ -45,32 +45,27 @@ final class OnboardingChoiceButton: UIButton {
         layer.borderWidth = 1
         layer.cornerRadius = Layout.cornerRadius
 
-        stackView.do {
-            $0.axis = .vertical
-            $0.alignment = .leading
-            $0.spacing = Layout.stackViewSpacing
-            $0.isUserInteractionEnabled = false
-        }
+        stackView.axis = .vertical
+        stackView.alignment = .leading
+        stackView.spacing = Layout.stackViewSpacing
+        stackView.isUserInteractionEnabled = false
 
         guard let subTitle = onboardingChoice.subTitle else {
-            mainLabel.do {
-                $0.text = onboardingChoice.mainTitle
-                $0.font = BitnagilFont(style: .body1, weight: .regular).font
-                $0.textColor = BitnagilColor.gray50
-            }
+            mainLabel.text = onboardingChoice.mainTitle
+            mainLabel.font = BitnagilFont(style: .body1, weight: .regular).font
+            mainLabel.textColor = BitnagilColor.gray50
             return
         }
 
-        mainLabel.do {
-            $0.text = onboardingChoice.mainTitle
-            $0.font = BitnagilFont(style: .subtitle1, weight: .semiBold).font
-            $0.textColor = BitnagilColor.gray50
-        }
+        mainLabel.text = onboardingChoice.mainTitle
+        mainLabel.font = BitnagilFont(style: .subtitle1, weight: .semiBold).font
+        mainLabel.textColor = BitnagilColor.gray50
 
-        subLabel = UILabel().then {
-            $0.text = subTitle
-            $0.font = BitnagilFont(style: .body2, weight: .regular).font
-            $0.textColor = BitnagilColor.gray50
+        subLabel = UILabel()
+        if let subLabel {
+            subLabel.text = subTitle
+            subLabel.font = BitnagilFont(style: .body2, weight: .regular).font
+            subLabel.textColor = BitnagilColor.gray50
         }
     }
 
diff --git a/Projects/Presentation/Sources/Onboarding/View/Component/ProgressBarView.swift b/Projects/Presentation/Sources/Onboarding/View/Component/ProgressBarView.swift
index 74d1f655..4efb840a 100644
--- a/Projects/Presentation/Sources/Onboarding/View/Component/ProgressBarView.swift
+++ b/Projects/Presentation/Sources/Onboarding/View/Component/ProgressBarView.swift
@@ -32,17 +32,13 @@ final class ProgressBarView: UIView {
     }
 
     private func configureAttribute() {
-        backgroundView.do {
-            $0.frame = bounds
-            $0.backgroundColor = .white
-            $0.layer.cornerRadius = Layout.barHeight / 2
-            $0.layer.masksToBounds = true
-        }
+        backgroundView.frame = bounds
+        backgroundView.backgroundColor = .white
+        backgroundView.layer.cornerRadius = Layout.barHeight / 2
+        backgroundView.layer.masksToBounds = true
 
-        progressView.do {
-            $0.layer.cornerRadius = Layout.barHeight / 2
-            $0.layer.masksToBounds = true
-        }
+        progressView.layer.cornerRadius = Layout.barHeight / 2
+        progressView.layer.masksToBounds = true
     }
 
     private func configureLayout(step: Int, stepCount: Int) {
diff --git a/Projects/Presentation/Sources/Onboarding/View/OnboardingRecommendedRoutineView.swift b/Projects/Presentation/Sources/Onboarding/View/OnboardingRecommendedRoutineView.swift
index 0dab1d53..c6cb7e1b 100644
--- a/Projects/Presentation/Sources/Onboarding/View/OnboardingRecommendedRoutineView.swift
+++ b/Projects/Presentation/Sources/Onboarding/View/OnboardingRecommendedRoutineView.swift
@@ -22,6 +22,8 @@ final class OnboardingRecommendedRoutineView: BaseViewController<OnboardingViewM
         static let routineButtonHeight: CGFloat = 84
         static let registerButtonHeight: CGFloat = 54
         static let registerButtonBottomSpacing: CGFloat = 10
+        static let skipButtonLabelFontSize: CGFloat = 14
+        static let skipButtonLabelLineHeight: CGFloat = 20
         static let skipButtonHeight: CGFloat = 54
         static let skipButtonBottomSpacing: CGFloat = 20
 
@@ -63,40 +65,32 @@ final class OnboardingRecommendedRoutineView: BaseViewController<OnboardingViewM
     }
 
     override func configureAttribute() {
-        mainLabel.do {
-            let text = "당신만의 추천 루틴이\n생성되었어요!"
-            $0.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
-            $0.textColor = BitnagilColor.navy500
-            $0.numberOfLines = 2
-            $0.textAlignment = .left
-        }
+        let mainLabelText = "당신만의 추천 루틴이\n생성되었어요!"
+        mainLabel.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: mainLabelText)
+        mainLabel.textColor = BitnagilColor.navy500
+        mainLabel.numberOfLines = 2
+        mainLabel.textAlignment = .left
 
-        subLabel.do {
-            let text = "당신의 생활 패턴과 목표에 맞춰 구성된 맞춤 루틴이에요.\n원하는 루틴을 선택해서 가볍게 시작해보세요."
-            $0.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: text)
-            $0.textColor = BitnagilColor.gray50
-            $0.numberOfLines = 2
-            $0.textAlignment = .left
-        }
+        let subLabelText = "당신의 생활 패턴과 목표에 맞춰 구성된 맞춤 루틴이에요.\n원하는 루틴을 선택해서 가볍게 시작해보세요."
+        subLabel.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: subLabelText)
+        subLabel.textColor = BitnagilColor.gray50
+        subLabel.numberOfLines = 2
+        subLabel.textAlignment = .left
 
-        recommendedRoutineStackView.do {
-            $0.axis = .vertical
-            $0.spacing = Layout.routineStackViewSpacing
-        }
+        recommendedRoutineStackView.axis = .vertical
+        recommendedRoutineStackView.spacing = Layout.routineStackViewSpacing
 
         registerButton.addAction(UIAction { [weak self] _ in
             self?.viewModel.action(input: .registerRecommendedRoutine)
         }, for: .touchUpInside)
 
-        skipButtonLabel.do {
-            $0.attributedText = BitnagilFont(
-                fontSize: 14,
-                lineHeight: 20,
-                underline: true,
-                weight: .regular
-            ).attributedString(text: "건너뛰기")
-            $0.textColor = BitnagilColor.navy500
-        }
+        skipButtonLabel.attributedText = BitnagilFont(
+            fontSize: Layout.skipButtonLabelFontSize,
+            lineHeight: Layout.skipButtonLabelLineHeight,
+            underline: true,
+            weight: .regular
+        ).attributedString(text: "건너뛰기")
+        skipButtonLabel.textColor = BitnagilColor.navy500
 
         skipButton.addAction(UIAction { [weak self] _ in
             self?.goToHomeView()
@@ -222,10 +216,9 @@ final class OnboardingRecommendedRoutineView: BaseViewController<OnboardingViewM
     }
 
     private func goToHomeView() {
-        guard let homeViewModel = DIContainer.shared.resolve(type: HomeViewModel.self) else {
-            fatalError("homeViewModel 의존성이 등록되지 않았습니다.")
+        if let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
+           let window = windowScene.windows.first(where: { $0.isKeyWindow }) {
+            window.rootViewController = TabBarView()
         }
-        let homeView = HomeView(viewModel: homeViewModel)
-        self.navigationController?.pushViewController(homeView, animated: true)
     }
 }
diff --git a/Projects/Presentation/Sources/Onboarding/View/OnboardingResultView.swift b/Projects/Presentation/Sources/Onboarding/View/OnboardingResultView.swift
index 61123faf..d42c3350 100644
--- a/Projects/Presentation/Sources/Onboarding/View/OnboardingResultView.swift
+++ b/Projects/Presentation/Sources/Onboarding/View/OnboardingResultView.swift
@@ -71,33 +71,24 @@ final class OnboardingResultView: BaseViewController<OnboardingViewModel> {
     }
 
     override func configureAttribute() {
-        mainLabel.do {
-            let text = "이제 당신에게\n꼭 맞는 루틴을 제안해드릴게요."
-            $0.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
-            $0.textColor = BitnagilColor.navy500
-            $0.numberOfLines = 2
-            $0.textAlignment = .left
-        }
-
-        subLabel.do {
-            $0.text = "당신은 지금"
-            $0.font = BitnagilFont(style: .body2, weight: .medium).font
-            $0.textColor = BitnagilColor.gray30
-        }
-
-        resultStackView.do {
-            $0.axis = .vertical
-            $0.spacing = Layout.resultStackViewSpacing
-        }
+        let text = "이제 당신에게\n꼭 맞는 루틴을 제안해드릴게요."
+        mainLabel.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: text)
+        mainLabel.textColor = BitnagilColor.navy500
+        mainLabel.numberOfLines = 2
+        mainLabel.textAlignment = .left
+        
+        subLabel.text = "당신은 지금"
+        subLabel.font = BitnagilFont(style: .body2, weight: .medium).font
+        subLabel.textColor = BitnagilColor.gray30
+
+        resultStackView.axis = .vertical
+        resultStackView.spacing = Layout.resultStackViewSpacing
 
         [timeResultLabel, feelingResultLabel, outdoorResultLabel].forEach { label in
-            label.do {
-                $0.textColor = BitnagilColor.gray30
-            }
-        }
-        graphicView.do {
-            $0.backgroundColor = BitnagilColor.gray90
+            label.textColor = BitnagilColor.gray30
         }
+
+        graphicView.backgroundColor = BitnagilColor.gray90
     }
 
     override func configureLayout() {
@@ -180,22 +171,16 @@ final class OnboardingResultView: BaseViewController<OnboardingViewModel> {
             baseText = ""
         }
 
-        timeResultLabel.do {
-            $0.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: timeResult)
-        }
+        timeResultLabel.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: timeResult)
     }
 
     private func updateFeelingResultLabel(feelingResult: String) {
         let baseText = "• \(feelingResult)을 원하는 중이에요"
-        feelingResultLabel.do {
-            $0.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: feelingResult)
-        }
+        feelingResultLabel.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: feelingResult)
     }
 
     private func updateOutdoorResultLabel(outdoorResult: String) {
         let baseText = "• \(outdoorResult)을 목표로 해볼게요!"
-        outdoorResultLabel.do {
-            $0.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: outdoorResult)
-        }
+        outdoorResultLabel.attributedText = NSAttributedString.highlighted(text: baseText, highlightText: outdoorResult)
     }
 }
diff --git a/Projects/Presentation/Sources/Onboarding/View/OnboardingView.swift b/Projects/Presentation/Sources/Onboarding/View/OnboardingView.swift
index afc3c970..e801cf74 100644
--- a/Projects/Presentation/Sources/Onboarding/View/OnboardingView.swift
+++ b/Projects/Presentation/Sources/Onboarding/View/OnboardingView.swift
@@ -61,26 +61,23 @@ final class OnboardingView: BaseViewController<OnboardingViewModel> {
     }
 
     override func configureAttribute() {
-        mainLabel.do {
-            $0.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: onboarding.mainTitle)
-            $0.textColor = BitnagilColor.navy500
-            $0.numberOfLines = 2
-            $0.textAlignment = .left
-        }
+        mainLabel.attributedText = BitnagilFont(style: .title2, weight: .bold).attributedString(text: onboarding.mainTitle)
+        mainLabel.textColor = BitnagilColor.navy500
+        mainLabel.numberOfLines = 2
+        mainLabel.textAlignment = .left
 
         if let subTitle = onboarding.subTitle {
-            subLabel = UILabel().then {
-                $0.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: subTitle)
-                $0.textColor = BitnagilColor.gray50
-                $0.numberOfLines = 2
-                $0.textAlignment = .left
+            subLabel = UILabel()
+            if let subLabel {
+                subLabel.attributedText = BitnagilFont(style: .body2, weight: .medium).attributedString(text: subTitle)
+                subLabel.textColor = BitnagilColor.gray50
+                subLabel.numberOfLines = 2
+                subLabel.textAlignment = .left
             }
         }
 
-        choiceStackView.do {
-            $0.axis = .vertical
-            $0.spacing = Layout.choiceStackViewSpacing
-        }
+        choiceStackView.axis = .vertical
+        choiceStackView.spacing = Layout.choiceStackViewSpacing
 
         for (index, choice) in onboarding.choices.enumerated() {
             let choiceButton = OnboardingChoiceButton(onboardingChoice: choice)
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RecommendedRoutineCardView.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RecommendedRoutineCardView.swift
index 786da57e..b2e569d2 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RecommendedRoutineCardView.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RecommendedRoutineCardView.swift
@@ -46,33 +46,25 @@ final class RecommendedRoutineCardView: UIView {
         backgroundColor = BitnagilColor.lightBlue75
         layer.cornerRadius = Layout.cornerRadius
 
-        labelStackView.do {
-            $0.axis = .vertical
-            $0.spacing = Layout.stackViewSpacing
-        }
-
-        mainLabel.do {
-            $0.text = recommendedRoutine.mainTitle
-            $0.font = BitnagilFont(style: .body1, weight: .semiBold).font
-            $0.textColor = BitnagilColor.navy500
-        }
-
-        subLabel.do {
-            $0.text = recommendedRoutine.subTitle
-            $0.font = BitnagilFont(style: .body2, weight: .regular).font
-            $0.textColor = BitnagilColor.navy300
-        }
-
-        plusButton.do {
-            let plusIcon = BitnagilIcon.plusIcon?
-                .resizeAspectFit(to: CGSize(width: Layout.plusImageSize, height: Layout.plusImageSize))
-            $0.setImage(plusIcon, for: .normal)
-            $0.tintColor = BitnagilColor.navy500
-            $0.addAction(UIAction { [weak self] _ in
-                guard let self else { return }
-                self.delegate?.recommendedRoutineCardView(self, didTapRecommendedRoutine: recommendedRoutine)
-            }, for: .touchUpInside)
-        }
+        labelStackView.axis = .vertical
+        labelStackView.spacing = Layout.stackViewSpacing
+
+        mainLabel.text = recommendedRoutine.mainTitle
+        mainLabel.font = BitnagilFont(style: .body1, weight: .semiBold).font
+        mainLabel.textColor = BitnagilColor.navy500
+
+        subLabel.text = recommendedRoutine.subTitle
+        subLabel.font = BitnagilFont(style: .body2, weight: .regular).font
+        subLabel.textColor = BitnagilColor.navy300
+
+        let plusIcon = BitnagilIcon.plusIcon?
+            .resizeAspectFit(to: CGSize(width: Layout.plusImageSize, height: Layout.plusImageSize))
+        plusButton.setImage(plusIcon, for: .normal)
+        plusButton.tintColor = BitnagilColor.navy500
+        plusButton.addAction(UIAction { [weak self] _ in
+            guard let self else { return }
+            self.delegate?.recommendedRoutineCardView(self, didTapRecommendedRoutine: recommendedRoutine)
+        }, for: .touchUpInside)
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RegisterEmotionButton.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RegisterEmotionButton.swift
index 41db9065..b0a7ea56 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RegisterEmotionButton.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RegisterEmotionButton.swift
@@ -37,19 +37,15 @@ final class RegisterEmotionButton: UIButton {
         layer.cornerRadius = Layout.cornerRadius
         layer.borderColor = BitnagilColor.navy100?.cgColor
 
-        plusIcon.do {
-            $0.contentMode = .center
-            $0.image = BitnagilIcon.plusIcon?
-                .resizeAspectFit(to: CGSize(width: Layout.plusIconImageSize, height: Layout.plusIconImageSize))?
-                .withRenderingMode(.alwaysTemplate)
-            $0.tintColor = BitnagilColor.navy400
-        }
+        plusIcon.contentMode = .center
+        plusIcon.image = BitnagilIcon.plusIcon?
+            .resizeAspectFit(to: CGSize(width: Layout.plusIconImageSize, height: Layout.plusIconImageSize))?
+            .withRenderingMode(.alwaysTemplate)
+        plusIcon.tintColor = BitnagilColor.navy400
 
-        buttonLabel.do {
-            $0.text = "오늘의 감정 루틴 추천받기"
-            $0.font = BitnagilFont(style: .body2, weight: .medium).font
-            $0.textColor = BitnagilColor.navy400
-        }
+        buttonLabel.text = "오늘의 감정 루틴 추천받기"
+        buttonLabel.font = BitnagilFont(style: .body2, weight: .medium).font
+        buttonLabel.textColor = BitnagilColor.navy400
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryButton.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryButton.swift
index 8d09a4c1..9961c5f5 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryButton.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryButton.swift
@@ -34,11 +34,9 @@ final class RoutineCategoryButton: UIButton {
     private func configureAttribute() {
         backgroundColor = BitnagilColor.gray99
 
-        categoryLabel.do {
-            $0.text = routineCategory.title
-            $0.font = BitnagilFont(style: .caption1, weight: .regular).font
-            $0.textColor = BitnagilColor.navy100
-        }
+        categoryLabel.text = routineCategory.title
+        categoryLabel.font = BitnagilFont(style: .caption1, weight: .regular).font
+        categoryLabel.textColor = BitnagilColor.navy100
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryView.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryView.swift
index 3f745d36..56527e6f 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryView.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineCategoryView.swift
@@ -38,10 +38,8 @@ final class RoutineCategoryView: UIView {
     private func configureAttribute() {
         scrollView.showsHorizontalScrollIndicator = false
 
-        buttonStackView.do {
-            $0.axis = .horizontal
-            $0.spacing = Layout.stackViewSpacing
-        }
+        buttonStackView.axis = .horizontal
+        buttonStackView.spacing = Layout.stackViewSpacing
 
         RoutineCategoryType.allCases.sorted(by: { $0.id < $1.id }).forEach { type in
             let button = RoutineCategoryButton(category: type)
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineLevelButton.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineLevelButton.swift
index 5375ec84..b11d05b0 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineLevelButton.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/Component/RoutineLevelButton.swift
@@ -37,26 +37,20 @@ final class RoutineLevelButton: UIButton {
     }
     
     private func configureAttribute() {
-        stackView.do {
-            $0.isUserInteractionEnabled = false
-            $0.axis = .horizontal
-            $0.spacing = Layout.stackViewSpacing
-        }
+        stackView.isUserInteractionEnabled = false
+        stackView.axis = .horizontal
+        stackView.spacing = Layout.stackViewSpacing
 
-        buttonLabel.do {
-            $0.text = level?.title ?? "난이도 선택"
-            $0.font = BitnagilFont(style: .body2, weight: .medium).font
-            $0.textColor = BitnagilColor.gray60
-        }
+        buttonLabel.text = level?.title ?? "난이도 선택"
+        buttonLabel.font = BitnagilFont(style: .body2, weight: .medium).font
+        buttonLabel.textColor = BitnagilColor.gray60
 
-        chevronIcon.do {
-            $0.image = BitnagilIcon
-                .chevronIcon(direction: .down)?
-                .resizeAspectFit(to: CGSize(width: Layout.chevronImageSize, height: Layout.chevronImageSize))?
-                .withRenderingMode(.alwaysTemplate)
-            $0.contentMode = .center
-            $0.tintColor = BitnagilColor.gray60
-        }
+        chevronIcon.image = BitnagilIcon
+            .chevronIcon(direction: .down)?
+            .resizeAspectFit(to: CGSize(width: Layout.chevronImageSize, height: Layout.chevronImageSize))?
+            .withRenderingMode(.alwaysTemplate)
+        chevronIcon.contentMode = .center
+        chevronIcon.tintColor = BitnagilColor.gray60
     }
 
     private func configureLayout() {
diff --git a/Projects/Presentation/Sources/RecommendedRoutine/View/RecommendedRoutineView.swift b/Projects/Presentation/Sources/RecommendedRoutine/View/RecommendedRoutineView.swift
index 530008a8..af0f2013 100644
--- a/Projects/Presentation/Sources/RecommendedRoutine/View/RecommendedRoutineView.swift
+++ b/Projects/Presentation/Sources/RecommendedRoutine/View/RecommendedRoutineView.swift
@@ -56,15 +56,11 @@ final class RecommendedRoutineView: BaseViewController<RecommendedRoutineViewMod
         title = "추천 루틴"
         categoryView.delegate = self
 
-        routineLabel.do {
-            $0.text = "루틴 목록"
-            $0.font = BitnagilFont(style: .body1, weight: .semiBold).font
-            $0.textColor = BitnagilColor.gray10
-        }
+        routineLabel.text = "루틴 목록"
+        routineLabel.font = BitnagilFont(style: .body1, weight: .semiBold).font
+        routineLabel.textColor = BitnagilColor.gray10
 
-        headerStackView.do {
-            $0.axis = .horizontal
-        }
+        headerStackView.axis = .horizontal
 
         levelButton.addAction(UIAction { _ in
             self.showBottomSheet()
@@ -72,14 +68,10 @@ final class RecommendedRoutineView: BaseViewController<RecommendedRoutineViewMod
 
         levelView.delegate = self
 
-        recommendedRoutineScrollView.do {
-            $0.showsVerticalScrollIndicator = false
-        }
-
-        recommendedRoutineStackView.do {
-            $0.axis = .vertical
-            $0.spacing = Layout.recommendedRoutineStackViewSpacing
-        }
+        recommendedRoutineScrollView.showsVerticalScrollIndicator = false
+        
+        recommendedRoutineStackView.axis = .vertical
+        recommendedRoutineStackView.spacing = Layout.recommendedRoutineStackViewSpacing
     }
 
     public override func configureLayout() {
diff --git a/Tuist/Package.resolved b/Tuist/Package.resolved
index e005cc89..03ed7691 100644
--- a/Tuist/Package.resolved
+++ b/Tuist/Package.resolved
@@ -26,15 +26,6 @@
         "revision" : "2842e6e84e82eb9a8dac0100ca90d9444b0307f4",
         "version" : "5.7.1"
       }
-    },
-    {
-      "identity" : "then",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/devxoul/Then.git",
-      "state" : {
-        "revision" : "d41ef523faef0f911369f79c0b96815d9dbb6d7a",
-        "version" : "3.0.0"
-      }
     }
   ],
   "version" : 2
diff --git a/Tuist/Package.swift b/Tuist/Package.swift
index 35107ce7..f1dc9d46 100644
--- a/Tuist/Package.swift
+++ b/Tuist/Package.swift
@@ -5,7 +5,6 @@ let package = Package(
   name: "Bitnagil",
   dependencies: [
     .package(url: "https://github.com/SnapKit/SnapKit.git", from: "5.0.0"),
-    .package(url: "https://github.com/devxoul/Then.git", from: "3.0.0"),
     .package(url: "https://github.com/kakao/kakao-ios-sdk", from: "2.23.0")
   ]
 )