diff --git a/.forge/iss-5a912ed79baf-attempt-2.md b/.forge/iss-5a912ed79baf-attempt-2.md
new file mode 100644
index 0000000..59e7abd
--- /dev/null
+++ b/.forge/iss-5a912ed79baf-attempt-2.md
@@ -0,0 +1,3 @@
+# iss-5a912ed79baf-attempt-2
+
+Forge 이슈 작업 브랜치 `forge/iss-5a912ed79baf-attempt-2`.
diff --git a/.forge/iss-5a912ed79baf-attempt-3.md b/.forge/iss-5a912ed79baf-attempt-3.md
deleted file mode 100644
index f95f3fb..0000000
--- a/.forge/iss-5a912ed79baf-attempt-3.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# iss-5a912ed79baf-attempt-3
-
-Forge 이슈 작업 브랜치 `forge/iss-5a912ed79baf-attempt-3`.
diff --git a/.forge/iss-87190c9836ac-attempt-1.md b/.forge/iss-87190c9836ac-attempt-1.md
deleted file mode 100644
index af8e790..0000000
--- a/.forge/iss-87190c9836ac-attempt-1.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# iss-87190c9836ac-attempt-1
-
-Forge 이슈 작업 브랜치 `forge/iss-87190c9836ac-attempt-1`.
diff --git a/docs/architecture/package-map.md b/docs/architecture/package-map.md
deleted file mode 100644
index c8762cf..0000000
--- a/docs/architecture/package-map.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# Package Responsibility Map
-
-| Package        | Responsibility                                  | Forbidden Dependencies |
-|----------------|------------------------------------------------|------------------------|
-| controller     | Handles user input and orchestrates payment    | domain                 |
-| service        | Contains business logic for payment processing  | integration            |
-| repository     | Data access layer for payment records           | service                |
-| domain         | Defines the core domain models and business rules| controller             |
-| integration     | Communicates with external payment gateways     | domain, service        |
\ No newline at end of file
diff --git a/docs/architecture/transaction-sequence.md b/docs/architecture/transaction-sequence.md
index 4d3460a..22984f9 100644
--- a/docs/architecture/transaction-sequence.md
+++ b/docs/architecture/transaction-sequence.md
@@ -1,38 +1,23 @@
 ```mermaid
 sequenceDiagram
     participant User
-    participant PaymentService
     participant PaymentGateway
     participant Database
 
-    %% Normal Flow
-    User->>PaymentService: Initiate Payment
-    PaymentService->>Database: Store Transaction
-    Database-->>PaymentService: Transaction Stored
-    PaymentService->>PaymentGateway: Process Payment
-    PaymentGateway-->>PaymentService: Payment Success
-    PaymentService->>Database: Update Transaction Status
-    Database-->>PaymentService: Transaction Updated
-    PaymentService-->>User: Payment Success
+    User->>PaymentGateway: Initiate payment
+    PaymentGateway->>User: Payment status (success)
+    User->>Database: Save transaction
+    Database-->>User: Transaction saved
 
-    %% External Failure Flow
-    User->>PaymentService: Initiate Payment
-    PaymentService->>Database: Store Transaction
-    Database-->>PaymentService: Transaction Stored
-    PaymentService->>PaymentGateway: Process Payment
-    PaymentGateway-->>PaymentService: Payment Failure
-    PaymentService->>Database: Rollback Transaction
-    Database-->>PaymentService: Transaction Rolled Back
-    PaymentService-->>User: Payment Failure
+    %% External failure scenario
+    User->>PaymentGateway: Initiate payment
+    PaymentGateway-->>User: Payment status (failure)
+    User->>Database: Log failure reason
 
-    %% DB Failure Flow
-    User->>PaymentService: Initiate Payment
-    PaymentService->>Database: Store Transaction
-    Database-->>PaymentService: Transaction Store Failure
-    PaymentService-->>User: Payment Failure
-
-    %% Commit & Rollback
-    Note over User, PaymentService: 
-    commit --> PaymentService
-    rollback --> PaymentService
+    %% Database failure scenario
+    User->>PaymentGateway: Initiate payment
+    PaymentGateway->>User: Payment status (success)
+    User->>Database: Save transaction
+    Database-->>User: Transaction failed (DB error)
+    Note right of User: Rollback transaction
 ```
\ No newline at end of file