diff --git a/backend/lined/config/spotbugs/spotbugs-exclude.xml b/backend/lined/config/spotbugs/spotbugs-exclude.xml
index 46e1424..e838f4f 100644
--- a/backend/lined/config/spotbugs/spotbugs-exclude.xml
+++ b/backend/lined/config/spotbugs/spotbugs-exclude.xml
@@ -4,7 +4,7 @@
         <Bug pattern="EI_EXPOSE_REP,EI_EXPOSE_REP2"/>
     </Match>
     <Match>
-        <Class name="io.backend.lined.user.api.UserMapper"/>
+        <Class name="io.backend.lined.user.api.dto.UserMapper"/>
         <Bug pattern="UPM_UNCALLED_PRIVATE_METHOD"/>
     </Match>
 </FindBugsFilter>
\ No newline at end of file
diff --git a/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationService.java b/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationService.java
index b558420..312988d 100644
--- a/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationService.java
+++ b/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationService.java
@@ -1,8 +1,8 @@
 package io.backend.lined.app;
 
-import io.backend.lined.subscription.api.SubscriptionDto;
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
 import java.util.Set;
 
 public interface AccountApplicationService {
diff --git a/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationServiceImpl.java
index 8305579..8157ef1 100644
--- a/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/app/AccountApplicationServiceImpl.java
@@ -1,12 +1,12 @@
 package io.backend.lined.app;
 
-import io.backend.lined.plan.api.PlanDto;
+import io.backend.lined.plan.api.dto.PlanDto;
 import io.backend.lined.plan.service.PlanService;
 import io.backend.lined.role.service.RoleService;
-import io.backend.lined.subscription.api.SubscriptionDto;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
 import io.backend.lined.subscription.service.SubscriptionService;
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
 import io.backend.lined.user.service.UserService;
 import jakarta.transaction.Transactional;
 import java.util.Set;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventController.java b/backend/lined/src/main/java/io/backend/lined/event/api/EventController.java
index 5d5a669..6ac7040 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventController.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/EventController.java
@@ -1,5 +1,10 @@
 package io.backend.lined.event.api;
 
+import io.backend.lined.event.api.dto.EventConflictDto;
+import io.backend.lined.event.api.dto.EventCreateDto;
+import io.backend.lined.event.api.dto.EventDto;
+import io.backend.lined.event.api.dto.EventUpdateDto;
+import io.backend.lined.event.api.dto.UserConflictDto;
 import io.backend.lined.event.service.EventService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventConflictDto.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventConflictDto.java
similarity index 92%
rename from backend/lined/src/main/java/io/backend/lined/event/api/EventConflictDto.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/EventConflictDto.java
index 33d6b8e..5334710 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventConflictDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventConflictDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventCreateDto.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventCreateDto.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/event/api/EventCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/EventCreateDto.java
index 6bbbecc..04fef18 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.NotBlank;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventDto.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventDto.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/event/api/EventDto.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/EventDto.java
index dae545d..444a981 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventMapper.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventMapper.java
similarity index 92%
rename from backend/lined/src/main/java/io/backend/lined/event/api/EventMapper.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/EventMapper.java
index 67ea45f..b84e5c3 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.backend.lined.event.domain.EventEntity;
 import org.mapstruct.Mapper;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/EventUpdateDto.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventUpdateDto.java
similarity index 91%
rename from backend/lined/src/main/java/io/backend/lined/event/api/EventUpdateDto.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/EventUpdateDto.java
index ea75047..6eba615 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/EventUpdateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/EventUpdateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/event/api/UserConflictDto.java b/backend/lined/src/main/java/io/backend/lined/event/api/dto/UserConflictDto.java
similarity index 91%
rename from backend/lined/src/main/java/io/backend/lined/event/api/UserConflictDto.java
rename to backend/lined/src/main/java/io/backend/lined/event/api/dto/UserConflictDto.java
index d83025a..9cc2628 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/api/UserConflictDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/api/dto/UserConflictDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.event.api;
+package io.backend.lined.event.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 
diff --git a/backend/lined/src/main/java/io/backend/lined/event/service/EventService.java b/backend/lined/src/main/java/io/backend/lined/event/service/EventService.java
index 323045a..80298d5 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/service/EventService.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/service/EventService.java
@@ -1,10 +1,10 @@
 package io.backend.lined.event.service;
 
-import io.backend.lined.event.api.EventConflictDto;
-import io.backend.lined.event.api.EventCreateDto;
-import io.backend.lined.event.api.EventDto;
-import io.backend.lined.event.api.EventUpdateDto;
-import io.backend.lined.event.api.UserConflictDto;
+import io.backend.lined.event.api.dto.EventConflictDto;
+import io.backend.lined.event.api.dto.EventCreateDto;
+import io.backend.lined.event.api.dto.EventDto;
+import io.backend.lined.event.api.dto.EventUpdateDto;
+import io.backend.lined.event.api.dto.UserConflictDto;
 import java.time.OffsetDateTime;
 import java.util.List;
 
diff --git a/backend/lined/src/main/java/io/backend/lined/event/service/EventServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/event/service/EventServiceImpl.java
index abfdd19..0448732 100644
--- a/backend/lined/src/main/java/io/backend/lined/event/service/EventServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/event/service/EventServiceImpl.java
@@ -1,11 +1,11 @@
 package io.backend.lined.event.service;
 
-import io.backend.lined.event.api.EventConflictDto;
-import io.backend.lined.event.api.EventCreateDto;
-import io.backend.lined.event.api.EventDto;
-import io.backend.lined.event.api.EventMapper;
-import io.backend.lined.event.api.EventUpdateDto;
-import io.backend.lined.event.api.UserConflictDto;
+import io.backend.lined.event.api.dto.EventConflictDto;
+import io.backend.lined.event.api.dto.EventCreateDto;
+import io.backend.lined.event.api.dto.EventDto;
+import io.backend.lined.event.api.dto.EventMapper;
+import io.backend.lined.event.api.dto.EventUpdateDto;
+import io.backend.lined.event.api.dto.UserConflictDto;
 import io.backend.lined.event.domain.EventEntity;
 import io.backend.lined.event.domain.EventRepository;
 import io.backend.lined.lobby.domain.LobbyEntity;
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyController.java b/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyController.java
index af452e0..7477741 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyController.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyController.java
@@ -1,5 +1,7 @@
 package io.backend.lined.lobby.api;
 
+import io.backend.lined.lobby.api.dto.LobbyCreateDto;
+import io.backend.lined.lobby.api.dto.LobbyDto;
 import io.backend.lined.lobby.service.LobbyService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyCreateDto.java b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyCreateDto.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyCreateDto.java
index 7ee26ed..6852c65 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.lobby.api;
+package io.backend.lined.lobby.api.dto;
 
 import io.backend.lined.lobby.domain.LobbyTypes;
 import io.swagger.v3.oas.annotations.media.Schema;
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyDto.java b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyDto.java
similarity index 91%
rename from backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyDto.java
rename to backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyDto.java
index 7fc3a78..de525fb 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.lobby.api;
+package io.backend.lined.lobby.api.dto;
 
 import io.backend.lined.lobby.domain.LobbyTypes;
 import io.swagger.v3.oas.annotations.media.Schema;
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyMapper.java b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyMapper.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyMapper.java
rename to backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyMapper.java
index ff235ac..c0477b4 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/api/LobbyMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/api/dto/LobbyMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.lobby.api;
+package io.backend.lined.lobby.api.dto;
 
 import io.backend.lined.lobby.domain.LobbyEntity;
 import io.backend.lined.user.domain.UserEntity;
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyService.java b/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyService.java
index 51daff1..4bf529a 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyService.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyService.java
@@ -1,7 +1,7 @@
 package io.backend.lined.lobby.service;
 
-import io.backend.lined.lobby.api.LobbyCreateDto;
-import io.backend.lined.lobby.api.LobbyDto;
+import io.backend.lined.lobby.api.dto.LobbyCreateDto;
+import io.backend.lined.lobby.api.dto.LobbyDto;
 import java.util.List;
 
 public interface LobbyService {
diff --git a/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyServiceImpl.java
index c65a9ad..779a518 100644
--- a/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/lobby/service/LobbyServiceImpl.java
@@ -1,8 +1,8 @@
 package io.backend.lined.lobby.service;
 
-import io.backend.lined.lobby.api.LobbyCreateDto;
-import io.backend.lined.lobby.api.LobbyDto;
-import io.backend.lined.lobby.api.LobbyMapper;
+import io.backend.lined.lobby.api.dto.LobbyCreateDto;
+import io.backend.lined.lobby.api.dto.LobbyDto;
+import io.backend.lined.lobby.api.dto.LobbyMapper;
 import io.backend.lined.lobby.domain.LobbyEntity;
 import io.backend.lined.lobby.domain.LobbyRepository;
 import io.backend.lined.user.domain.UserRepository;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanController.java b/backend/lined/src/main/java/io/backend/lined/plan/api/PlanController.java
index 373f845..90859fe 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanController.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/api/PlanController.java
@@ -1,5 +1,8 @@
 package io.backend.lined.plan.api;
 
+import io.backend.lined.plan.api.dto.PlanCreateDto;
+import io.backend.lined.plan.api.dto.PlanDto;
+import io.backend.lined.plan.api.dto.PlanUpdateDto;
 import io.backend.lined.plan.service.PlanService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanCreateDto.java b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanCreateDto.java
similarity index 90%
rename from backend/lined/src/main/java/io/backend/lined/plan/api/PlanCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanCreateDto.java
index e860825..c2d642d 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.plan.api;
+package io.backend.lined.plan.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.math.BigDecimal;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanDto.java b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanDto.java
similarity index 91%
rename from backend/lined/src/main/java/io/backend/lined/plan/api/PlanDto.java
rename to backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanDto.java
index 325a7df..6e858a6 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.plan.api;
+package io.backend.lined.plan.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.math.BigDecimal;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanMapper.java b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanMapper.java
similarity index 95%
rename from backend/lined/src/main/java/io/backend/lined/plan/api/PlanMapper.java
rename to backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanMapper.java
index a86c58f..f8dadf9 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.plan.api;
+package io.backend.lined.plan.api.dto;
 
 import io.backend.lined.plan.domain.PlanEntity;
 import org.mapstruct.Mapper;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanUpdateDto.java b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanUpdateDto.java
similarity index 90%
rename from backend/lined/src/main/java/io/backend/lined/plan/api/PlanUpdateDto.java
rename to backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanUpdateDto.java
index dac9768..87ae4a1 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/api/PlanUpdateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/api/dto/PlanUpdateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.plan.api;
+package io.backend.lined.plan.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.math.BigDecimal;
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/service/PlanService.java b/backend/lined/src/main/java/io/backend/lined/plan/service/PlanService.java
index fd86b4e..cb3c5e7 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/service/PlanService.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/service/PlanService.java
@@ -1,8 +1,8 @@
 package io.backend.lined.plan.service;
 
-import io.backend.lined.plan.api.PlanCreateDto;
-import io.backend.lined.plan.api.PlanDto;
-import io.backend.lined.plan.api.PlanUpdateDto;
+import io.backend.lined.plan.api.dto.PlanCreateDto;
+import io.backend.lined.plan.api.dto.PlanDto;
+import io.backend.lined.plan.api.dto.PlanUpdateDto;
 import java.util.List;
 
 public interface PlanService {
diff --git a/backend/lined/src/main/java/io/backend/lined/plan/service/PlanServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/plan/service/PlanServiceImpl.java
index 34b615e..5ca4e60 100644
--- a/backend/lined/src/main/java/io/backend/lined/plan/service/PlanServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/plan/service/PlanServiceImpl.java
@@ -1,10 +1,10 @@
 package io.backend.lined.plan.service;
 
 import io.backend.lined.common.exception.NotFoundException;
-import io.backend.lined.plan.api.PlanCreateDto;
-import io.backend.lined.plan.api.PlanDto;
-import io.backend.lined.plan.api.PlanMapper;
-import io.backend.lined.plan.api.PlanUpdateDto;
+import io.backend.lined.plan.api.dto.PlanCreateDto;
+import io.backend.lined.plan.api.dto.PlanDto;
+import io.backend.lined.plan.api.dto.PlanMapper;
+import io.backend.lined.plan.api.dto.PlanUpdateDto;
 import io.backend.lined.plan.domain.PlanEntity;
 import io.backend.lined.plan.domain.PlanRepository;
 import java.util.List;
diff --git a/backend/lined/src/main/java/io/backend/lined/role/api/RoleController.java b/backend/lined/src/main/java/io/backend/lined/role/api/RoleController.java
index e142a04..3c9a089 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/api/RoleController.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/api/RoleController.java
@@ -1,5 +1,8 @@
 package io.backend.lined.role.api;
 
+import io.backend.lined.role.api.dto.AssignRolesRequestDto;
+import io.backend.lined.role.api.dto.RoleDto;
+import io.backend.lined.role.api.dto.RoleNameDto;
 import io.backend.lined.role.service.RoleService;
 import jakarta.validation.Valid;
 import java.util.List;
diff --git a/backend/lined/src/main/java/io/backend/lined/role/api/AssignRolesRequestDto.java b/backend/lined/src/main/java/io/backend/lined/role/api/dto/AssignRolesRequestDto.java
similarity index 84%
rename from backend/lined/src/main/java/io/backend/lined/role/api/AssignRolesRequestDto.java
rename to backend/lined/src/main/java/io/backend/lined/role/api/dto/AssignRolesRequestDto.java
index 854a2c3..6a8c417 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/api/AssignRolesRequestDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/api/dto/AssignRolesRequestDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.role.api;
+package io.backend.lined.role.api.dto;
 
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.Size;
diff --git a/backend/lined/src/main/java/io/backend/lined/role/api/RoleDto.java b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleDto.java
similarity index 55%
rename from backend/lined/src/main/java/io/backend/lined/role/api/RoleDto.java
rename to backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleDto.java
index e3aefe7..a784395 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/api/RoleDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.role.api;
+package io.backend.lined.role.api.dto;
 
 public record RoleDto(long id, String name) {
 }
diff --git a/backend/lined/src/main/java/io/backend/lined/role/api/RoleMapper.java b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleMapper.java
similarity index 90%
rename from backend/lined/src/main/java/io/backend/lined/role/api/RoleMapper.java
rename to backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleMapper.java
index 444ed4c..d4b1a51 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/api/RoleMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.role.api;
+package io.backend.lined.role.api.dto;
 
 import io.backend.lined.role.domain.RoleEntity;
 import org.mapstruct.Mapper;
diff --git a/backend/lined/src/main/java/io/backend/lined/role/api/RoleNameDto.java b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleNameDto.java
similarity index 53%
rename from backend/lined/src/main/java/io/backend/lined/role/api/RoleNameDto.java
rename to backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleNameDto.java
index 3a7b9a8..5af0aa9 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/api/RoleNameDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/api/dto/RoleNameDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.role.api;
+package io.backend.lined.role.api.dto;
 
 public record RoleNameDto(String name) {
 }
diff --git a/backend/lined/src/main/java/io/backend/lined/role/service/RoleService.java b/backend/lined/src/main/java/io/backend/lined/role/service/RoleService.java
index a9a9629..6e272b0 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/service/RoleService.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/service/RoleService.java
@@ -1,6 +1,6 @@
 package io.backend.lined.role.service;
 
-import io.backend.lined.role.api.RoleDto;
+import io.backend.lined.role.api.dto.RoleDto;
 import java.util.List;
 import java.util.Set;
 
diff --git a/backend/lined/src/main/java/io/backend/lined/role/service/RoleServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/role/service/RoleServiceImpl.java
index 59c9b6d..7928460 100644
--- a/backend/lined/src/main/java/io/backend/lined/role/service/RoleServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/role/service/RoleServiceImpl.java
@@ -3,8 +3,8 @@
 import static java.lang.String.format;
 
 import io.backend.lined.common.exception.NotFoundException;
-import io.backend.lined.role.api.RoleDto;
-import io.backend.lined.role.api.RoleMapper;
+import io.backend.lined.role.api.dto.RoleDto;
+import io.backend.lined.role.api.dto.RoleMapper;
 import io.backend.lined.role.domain.RoleEntity;
 import io.backend.lined.role.domain.RoleRepository;
 import io.backend.lined.user.domain.UserEntity;
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionController.java b/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionController.java
index 411987b..39ecd95 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionController.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionController.java
@@ -1,5 +1,7 @@
 package io.backend.lined.subscription.api;
 
+import io.backend.lined.subscription.api.dto.SubscriptionCreateDto;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
 import io.backend.lined.subscription.service.SubscriptionService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionCreateDto.java b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionCreateDto.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionCreateDto.java
index a6e14f5..45f59f4 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.subscription.api;
+package io.backend.lined.subscription.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.NotNull;
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionDto.java b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionDto.java
similarity index 84%
rename from backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionDto.java
rename to backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionDto.java
index 4a4be25..4ace489 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.subscription.api;
+package io.backend.lined.subscription.api.dto;
 
 import java.time.OffsetDateTime;
 
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionMapper.java b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionMapper.java
similarity index 92%
rename from backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionMapper.java
rename to backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionMapper.java
index 8b632b1..97fc021 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/api/SubscriptionMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/api/dto/SubscriptionMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.subscription.api;
+package io.backend.lined.subscription.api.dto;
 
 import io.backend.lined.subscription.domain.UserSubscriptionEntity;
 import org.mapstruct.Mapper;
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionService.java b/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionService.java
index a1bd490..ad68b3d 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionService.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionService.java
@@ -1,6 +1,6 @@
 package io.backend.lined.subscription.service;
 
-import io.backend.lined.subscription.api.SubscriptionDto;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
 import java.time.OffsetDateTime;
 import java.util.List;
 import java.util.Optional;
diff --git a/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionServiceImpl.java
index cc775bd..84b477c 100644
--- a/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/subscription/service/SubscriptionServiceImpl.java
@@ -3,8 +3,8 @@
 import io.backend.lined.common.exception.NotFoundException;
 import io.backend.lined.plan.domain.PlanEntity;
 import io.backend.lined.plan.domain.PlanRepository;
-import io.backend.lined.subscription.api.SubscriptionDto;
-import io.backend.lined.subscription.api.SubscriptionMapper;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
+import io.backend.lined.subscription.api.dto.SubscriptionMapper;
 import io.backend.lined.subscription.domain.UserSubscriptionEntity;
 import io.backend.lined.subscription.domain.UserSubscriptionRepository;
 import io.backend.lined.user.domain.UserEntity;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/api/TaskController.java b/backend/lined/src/main/java/io/backend/lined/task/api/TaskController.java
index b8925fb..cd19202 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/api/TaskController.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/api/TaskController.java
@@ -1,5 +1,8 @@
 package io.backend.lined.task.api;
 
+import io.backend.lined.task.api.dto.TaskCreateDto;
+import io.backend.lined.task.api.dto.TaskDto;
+import io.backend.lined.task.api.dto.TaskUpdateDto;
 import io.backend.lined.task.service.TaskService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/api/TaskCreateDto.java b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskCreateDto.java
similarity index 92%
rename from backend/lined/src/main/java/io/backend/lined/task/api/TaskCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskCreateDto.java
index 812edeb..e9e6a5e 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/api/TaskCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.task.api;
+package io.backend.lined.task.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.NotBlank;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/api/TaskDto.java b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskDto.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/task/api/TaskDto.java
rename to backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskDto.java
index c6d0ce0..fba427c 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/api/TaskDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.task.api;
+package io.backend.lined.task.api.dto;
 
 import io.backend.lined.task.domain.TaskStatus;
 import io.swagger.v3.oas.annotations.media.Schema;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/api/TaskMapper.java b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskMapper.java
similarity index 93%
rename from backend/lined/src/main/java/io/backend/lined/task/api/TaskMapper.java
rename to backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskMapper.java
index 69f13c7..5a4cedb 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/api/TaskMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskMapper.java
@@ -1,4 +1,4 @@
-package io.backend.lined.task.api;
+package io.backend.lined.task.api.dto;
 
 import io.backend.lined.task.domain.TaskEntity;
 import org.mapstruct.Mapper;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/api/TaskUpdateDto.java b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskUpdateDto.java
similarity index 91%
rename from backend/lined/src/main/java/io/backend/lined/task/api/TaskUpdateDto.java
rename to backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskUpdateDto.java
index afd22bc..dcaa15e 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/api/TaskUpdateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/api/dto/TaskUpdateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.task.api;
+package io.backend.lined.task.api.dto;
 
 import io.backend.lined.task.domain.TaskStatus;
 import io.swagger.v3.oas.annotations.media.Schema;
diff --git a/backend/lined/src/main/java/io/backend/lined/task/service/TaskService.java b/backend/lined/src/main/java/io/backend/lined/task/service/TaskService.java
index 226489b..d464276 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/service/TaskService.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/service/TaskService.java
@@ -1,9 +1,9 @@
 package io.backend.lined.task.service;
 
 
-import io.backend.lined.task.api.TaskCreateDto;
-import io.backend.lined.task.api.TaskDto;
-import io.backend.lined.task.api.TaskUpdateDto;
+import io.backend.lined.task.api.dto.TaskCreateDto;
+import io.backend.lined.task.api.dto.TaskDto;
+import io.backend.lined.task.api.dto.TaskUpdateDto;
 import java.util.List;
 
 public interface TaskService {
diff --git a/backend/lined/src/main/java/io/backend/lined/task/service/TaskServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/task/service/TaskServiceImpl.java
index e7fa031..69aa09d 100644
--- a/backend/lined/src/main/java/io/backend/lined/task/service/TaskServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/task/service/TaskServiceImpl.java
@@ -2,10 +2,10 @@
 
 import io.backend.lined.lobby.domain.LobbyEntity;
 import io.backend.lined.lobby.domain.LobbyRepository;
-import io.backend.lined.task.api.TaskCreateDto;
-import io.backend.lined.task.api.TaskDto;
-import io.backend.lined.task.api.TaskMapper;
-import io.backend.lined.task.api.TaskUpdateDto;
+import io.backend.lined.task.api.dto.TaskCreateDto;
+import io.backend.lined.task.api.dto.TaskDto;
+import io.backend.lined.task.api.dto.TaskMapper;
+import io.backend.lined.task.api.dto.TaskUpdateDto;
 import io.backend.lined.task.domain.TaskEntity;
 import io.backend.lined.task.domain.TaskRepository;
 import io.backend.lined.task.domain.TaskStatus;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserController.java b/backend/lined/src/main/java/io/backend/lined/user/api/UserController.java
index 6b4eecf..43f57d8 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserController.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/UserController.java
@@ -1,5 +1,9 @@
 package io.backend.lined.user.api;
 
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
+import io.backend.lined.user.api.dto.UserPageDto;
+import io.backend.lined.user.api.dto.UserUpdateDto;
 import io.backend.lined.user.service.UserService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserCreateDto.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserCreateDto.java
similarity index 90%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserCreateDto.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserCreateDto.java
index 7d3cf65..6afde2e 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserCreateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserCreateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
 import jakarta.validation.constraints.Email;
 import jakarta.validation.constraints.NotBlank;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserDto.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserDto.java
similarity index 96%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserDto.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserDto.java
index aaf85fd..dc3f0d4 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserMapper.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserMapper.java
similarity index 94%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserMapper.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserMapper.java
index 3c12c6e..8829243 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserMapper.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserMapper.java
@@ -1,8 +1,8 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
-import io.backend.lined.role.api.RoleMapper;
+import io.backend.lined.role.api.dto.RoleMapper;
 import io.backend.lined.role.domain.RoleEntity;
-import io.backend.lined.subscription.api.SubscriptionMapper;
+import io.backend.lined.subscription.api.dto.SubscriptionMapper;
 import io.backend.lined.subscription.domain.UserSubscriptionEntity;
 import io.backend.lined.user.domain.UserEntity;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserPageDto.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserPageDto.java
similarity index 81%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserPageDto.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserPageDto.java
index 6aa26ce..5b61c32 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserPageDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserPageDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
 import java.util.List;
 
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserSearchResultDto.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserSearchResultDto.java
similarity index 93%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserSearchResultDto.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserSearchResultDto.java
index 901bc4c..603bb03 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserSearchResultDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserSearchResultDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/api/UserUpdateDto.java b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserUpdateDto.java
similarity index 88%
rename from backend/lined/src/main/java/io/backend/lined/user/api/UserUpdateDto.java
rename to backend/lined/src/main/java/io/backend/lined/user/api/dto/UserUpdateDto.java
index 8c9bcc8..90bd188 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/api/UserUpdateDto.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/api/dto/UserUpdateDto.java
@@ -1,4 +1,4 @@
-package io.backend.lined.user.api;
+package io.backend.lined.user.api.dto;
 
 import jakarta.validation.constraints.Email;
 import jakarta.validation.constraints.Size;
diff --git a/backend/lined/src/main/java/io/backend/lined/user/service/UserService.java b/backend/lined/src/main/java/io/backend/lined/user/service/UserService.java
index 24f8173..b977c9b 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/service/UserService.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/service/UserService.java
@@ -1,9 +1,9 @@
 package io.backend.lined.user.service;
 
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
-import io.backend.lined.user.api.UserPageDto;
-import io.backend.lined.user.api.UserUpdateDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
+import io.backend.lined.user.api.dto.UserPageDto;
+import io.backend.lined.user.api.dto.UserUpdateDto;
 
 public interface UserService {
 
diff --git a/backend/lined/src/main/java/io/backend/lined/user/service/UserServiceImpl.java b/backend/lined/src/main/java/io/backend/lined/user/service/UserServiceImpl.java
index acc2f44..7eae6ea 100644
--- a/backend/lined/src/main/java/io/backend/lined/user/service/UserServiceImpl.java
+++ b/backend/lined/src/main/java/io/backend/lined/user/service/UserServiceImpl.java
@@ -6,12 +6,12 @@
 import io.backend.lined.common.exception.NotFoundException;
 import io.backend.lined.role.domain.RoleEntity;
 import io.backend.lined.role.domain.RoleRepository;
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
-import io.backend.lined.user.api.UserMapper;
-import io.backend.lined.user.api.UserPageDto;
-import io.backend.lined.user.api.UserSearchResultDto;
-import io.backend.lined.user.api.UserUpdateDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
+import io.backend.lined.user.api.dto.UserMapper;
+import io.backend.lined.user.api.dto.UserPageDto;
+import io.backend.lined.user.api.dto.UserSearchResultDto;
+import io.backend.lined.user.api.dto.UserUpdateDto;
 import io.backend.lined.user.domain.UserEntity;
 import io.backend.lined.user.domain.UserRepository;
 import jakarta.transaction.Transactional;
diff --git a/backend/lined/src/test/java/io/backend/lined/app/AccountApplicationServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/app/AccountApplicationServiceImplTest.java
index 83fdd68..4037336 100644
--- a/backend/lined/src/test/java/io/backend/lined/app/AccountApplicationServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/app/AccountApplicationServiceImplTest.java
@@ -8,13 +8,13 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import io.backend.lined.plan.api.PlanDto;
+import io.backend.lined.plan.api.dto.PlanDto;
 import io.backend.lined.plan.service.PlanService;
 import io.backend.lined.role.service.RoleService;
-import io.backend.lined.subscription.api.SubscriptionDto;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
 import io.backend.lined.subscription.service.SubscriptionService;
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
 import io.backend.lined.user.service.UserService;
 import java.math.BigDecimal;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplConflictTest.java b/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplConflictTest.java
index 8f462a1..7a291d1 100644
--- a/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplConflictTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplConflictTest.java
@@ -8,10 +8,10 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import io.backend.lined.event.api.EventConflictDto;
-import io.backend.lined.event.api.EventDto;
-import io.backend.lined.event.api.EventMapper;
-import io.backend.lined.event.api.UserConflictDto;
+import io.backend.lined.event.api.dto.EventConflictDto;
+import io.backend.lined.event.api.dto.EventDto;
+import io.backend.lined.event.api.dto.EventMapper;
+import io.backend.lined.event.api.dto.UserConflictDto;
 import io.backend.lined.event.domain.EventEntity;
 import io.backend.lined.event.domain.EventRepository;
 import io.backend.lined.lobby.domain.LobbyEntity;
diff --git a/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplTest.java
index 6799607..0ba310d 100644
--- a/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/event/service/EventServiceImplTest.java
@@ -7,10 +7,10 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import io.backend.lined.event.api.EventCreateDto;
-import io.backend.lined.event.api.EventDto;
-import io.backend.lined.event.api.EventMapper;
-import io.backend.lined.event.api.EventUpdateDto;
+import io.backend.lined.event.api.dto.EventCreateDto;
+import io.backend.lined.event.api.dto.EventDto;
+import io.backend.lined.event.api.dto.EventMapper;
+import io.backend.lined.event.api.dto.EventUpdateDto;
 import io.backend.lined.event.domain.EventEntity;
 import io.backend.lined.event.domain.EventRepository;
 import io.backend.lined.lobby.domain.LobbyEntity;
diff --git a/backend/lined/src/test/java/io/backend/lined/lobby/service/LobbyServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/lobby/service/LobbyServiceImplTest.java
index 038e809..836e0d4 100644
--- a/backend/lined/src/test/java/io/backend/lined/lobby/service/LobbyServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/lobby/service/LobbyServiceImplTest.java
@@ -1,8 +1,8 @@
 package io.backend.lined.lobby.service;
 
-import io.backend.lined.lobby.api.LobbyCreateDto;
-import io.backend.lined.lobby.api.LobbyDto;
-import io.backend.lined.lobby.api.LobbyMapper;
+import io.backend.lined.lobby.api.dto.LobbyCreateDto;
+import io.backend.lined.lobby.api.dto.LobbyDto;
+import io.backend.lined.lobby.api.dto.LobbyMapper;
 import io.backend.lined.lobby.domain.LobbyEntity;
 import io.backend.lined.lobby.domain.LobbyRepository;
 import io.backend.lined.lobby.domain.LobbyTypes;
diff --git a/backend/lined/src/test/java/io/backend/lined/plan/service/PlanServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/plan/service/PlanServiceImplTest.java
index 2ab79fe..c067375 100644
--- a/backend/lined/src/test/java/io/backend/lined/plan/service/PlanServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/plan/service/PlanServiceImplTest.java
@@ -1,10 +1,10 @@
 package io.backend.lined.plan.service;
 
 import io.backend.lined.common.exception.NotFoundException;
-import io.backend.lined.plan.api.PlanCreateDto;
-import io.backend.lined.plan.api.PlanDto;
-import io.backend.lined.plan.api.PlanMapper;
-import io.backend.lined.plan.api.PlanUpdateDto;
+import io.backend.lined.plan.api.dto.PlanCreateDto;
+import io.backend.lined.plan.api.dto.PlanDto;
+import io.backend.lined.plan.api.dto.PlanMapper;
+import io.backend.lined.plan.api.dto.PlanUpdateDto;
 import io.backend.lined.plan.domain.PlanEntity;
 import io.backend.lined.plan.domain.PlanRepository;
 import org.junit.jupiter.api.BeforeEach;
diff --git a/backend/lined/src/test/java/io/backend/lined/role/service/RoleServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/role/service/RoleServiceImplTest.java
index c301567..9c9755f 100644
--- a/backend/lined/src/test/java/io/backend/lined/role/service/RoleServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/role/service/RoleServiceImplTest.java
@@ -1,8 +1,8 @@
 package io.backend.lined.role.service;
 
 import io.backend.lined.common.exception.NotFoundException;
-import io.backend.lined.role.api.RoleDto;
-import io.backend.lined.role.api.RoleMapper;
+import io.backend.lined.role.api.dto.RoleDto;
+import io.backend.lined.role.api.dto.RoleMapper;
 import io.backend.lined.role.domain.RoleEntity;
 import io.backend.lined.role.domain.RoleRepository;
 import io.backend.lined.user.domain.UserEntity;
diff --git a/backend/lined/src/test/java/io/backend/lined/subscription/service/SubscriptionServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/subscription/service/SubscriptionServiceImplTest.java
index d29db01..2b7b418 100644
--- a/backend/lined/src/test/java/io/backend/lined/subscription/service/SubscriptionServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/subscription/service/SubscriptionServiceImplTest.java
@@ -3,8 +3,8 @@
 import io.backend.lined.common.exception.NotFoundException;
 import io.backend.lined.plan.domain.PlanEntity;
 import io.backend.lined.plan.domain.PlanRepository;
-import io.backend.lined.subscription.api.SubscriptionDto;
-import io.backend.lined.subscription.api.SubscriptionMapper;
+import io.backend.lined.subscription.api.dto.SubscriptionDto;
+import io.backend.lined.subscription.api.dto.SubscriptionMapper;
 import io.backend.lined.subscription.domain.UserSubscriptionEntity;
 import io.backend.lined.subscription.domain.UserSubscriptionRepository;
 import io.backend.lined.user.domain.UserEntity;
diff --git a/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplSearchTest.java b/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplSearchTest.java
index 5bae86f..6022109 100644
--- a/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplSearchTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplSearchTest.java
@@ -11,9 +11,9 @@
 import io.backend.lined.common.exception.NotFoundException;
 import io.backend.lined.role.domain.RoleEntity;
 import io.backend.lined.role.domain.RoleRepository;
-import io.backend.lined.user.api.UserMapper;
-import io.backend.lined.user.api.UserPageDto;
-import io.backend.lined.user.api.UserSearchResultDto;
+import io.backend.lined.user.api.dto.UserMapper;
+import io.backend.lined.user.api.dto.UserPageDto;
+import io.backend.lined.user.api.dto.UserSearchResultDto;
 import io.backend.lined.user.domain.UserEntity;
 import io.backend.lined.user.domain.UserRepository;
 import java.time.OffsetDateTime;
diff --git a/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplTest.java b/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplTest.java
index c90bb95..0686959 100644
--- a/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplTest.java
+++ b/backend/lined/src/test/java/io/backend/lined/user/service/UserServiceImplTest.java
@@ -12,10 +12,10 @@
 import io.backend.lined.common.exception.NotFoundException;
 import io.backend.lined.role.domain.RoleEntity;
 import io.backend.lined.role.domain.RoleRepository;
-import io.backend.lined.user.api.UserCreateDto;
-import io.backend.lined.user.api.UserDto;
-import io.backend.lined.user.api.UserMapper;
-import io.backend.lined.user.api.UserUpdateDto;
+import io.backend.lined.user.api.dto.UserCreateDto;
+import io.backend.lined.user.api.dto.UserDto;
+import io.backend.lined.user.api.dto.UserMapper;
+import io.backend.lined.user.api.dto.UserUpdateDto;
 import io.backend.lined.user.domain.UserEntity;
 import io.backend.lined.user.domain.UserRepository;
 import java.util.Optional;