diff --git a/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2AttendanceService.java b/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2AttendanceService.java
index bf632fe..66616c5 100644
--- a/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2AttendanceService.java
+++ b/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2AttendanceService.java
@@ -30,6 +30,7 @@
 import team.wego.wegobackend.group.v2.domain.repository.GroupUserV2QueryRepository;
 import team.wego.wegobackend.group.v2.domain.repository.GroupUserV2Repository;
 import team.wego.wegobackend.group.v2.domain.repository.GroupV2Repository;
+import team.wego.wegobackend.user.domain.User;
 import team.wego.wegobackend.user.repository.UserRepository;
 
 @Slf4j
@@ -51,9 +52,8 @@ public class GroupV2AttendanceService {
     @Transactional
     public AttendanceGroupV2Response attend(Long userId, Long groupId, String message) {
         // 회원 체크
-        if (userId == null) {
-            throw new GroupException(GroupErrorCode.USER_ID_NULL);
-        }
+        User member = userRepository.findById(userId)
+                .orElseThrow(() -> new GroupException(GroupErrorCode.USER_ID_NULL));
 
         // 모임 체크: for update로 가져오기
         GroupV2 group = groupV2Repository.findByIdForUpdate(groupId)
@@ -119,7 +119,8 @@ public AttendanceGroupV2Response attend(Long userId, Long groupId, String messag
             }
 
             // FULL 자동 전환
-            long newCount = groupUserV2Repository.countByGroupIdAndStatus(groupId, GroupUserV2Status.ATTEND);
+            long newCount = groupUserV2Repository.countByGroupIdAndStatus(groupId,
+                    GroupUserV2Status.ATTEND);
 
             if (newCount == group.getMaxParticipants()
                     && group.getStatus() == GroupV2Status.RECRUITING) {
@@ -132,6 +133,8 @@ public AttendanceGroupV2Response attend(Long userId, Long groupId, String messag
             eventPublisher.publishEvent(
                     new GroupJoinedEvent(groupId, group.getHost().getId(), userId));
 
+            member.increaseGroupJoinedCount();
+
             return AttendanceGroupV2Response.of(group, newCount, membership);
         }
 
@@ -298,6 +301,11 @@ public GroupUserV2StatusResponse approve(Long approverUserId, Long groupId,
             group.changeStatus(GroupV2Status.FULL);
         }
 
+        User member = userRepository.findById(targetUserId)
+                .orElseThrow(() -> new GroupException(GroupErrorCode.USER_ID_NULL, targetUserId));
+
+        member.increaseGroupJoinedCount();
+
         eventPublisher.publishEvent(
                 new GroupJoinApprovedEvent(groupId, approverUserId, targetUserId));
 
diff --git a/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2Service.java b/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2Service.java
index d075ae9..922ce26 100644
--- a/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2Service.java
+++ b/src/main/java/team/wego/wegobackend/group/v2/application/service/GroupV2Service.java
@@ -202,11 +202,14 @@ public CreateGroupV2Response create(Long userId, CreateGroupV2Request request) {
 
         groupCreateCooldownService.acquireOrThrowWithRollbackRelease(userId, COOL_DOWN_SECONDS);
 
-        // 회원 조회
+        // 회원 조회 후 카운트
         User host = userRepository.findById(userId)
                 .orElseThrow(() -> new GroupException(GroupErrorCode.HOST_USER_NOT_FOUND, userId)
                 );
 
+        host.increaseGroupCreatedCount();
+        host.increaseGroupJoinedCount();
+
         // 모임 주소 생성
         GroupV2Address address = GroupV2Address.of(request.location(), request.locationDetail());
 
@@ -283,9 +286,15 @@ public GetGroupV2Response getGroup(Long userId, Long groupId) {
                 .orElseThrow(
                         () -> new GroupException(GroupErrorCode.GROUP_NOT_FOUND_BY_ID, groupId));
 
+        // HOST 여부에 따라 응답 결과를 분기 처리하자.
+        boolean isHost = group.getHost().getId().equals(userId);
+
+        List<GroupUserV2> users = isHost
+                ? groupUserV2Repository.findByGroupIdOrderByJoinedAtAscWithUser(groupId)
+                : groupUserV2Repository.findAttendByGroupIdOrderByJoinedAtAscWithUser(groupId);
+
         // 컬렉션은 안전하게 따로 보관해서 옮겨야 좋다고 한다.
         List<GroupImageV2> images = groupImageV2Repository.findAllByGroupIdWithVariants(groupId);
-        List<GroupUserV2> users = groupUserV2Repository.findAllByGroupIdWithUser(groupId);
 
         Long chatRoomId = group.getChatRoom() != null ? group.getChatRoom().getId() : null;
 
diff --git a/src/main/java/team/wego/wegobackend/group/v2/domain/repository/GroupUserV2Repository.java b/src/main/java/team/wego/wegobackend/group/v2/domain/repository/GroupUserV2Repository.java
index c0503a3..a52b413 100644
--- a/src/main/java/team/wego/wegobackend/group/v2/domain/repository/GroupUserV2Repository.java
+++ b/src/main/java/team/wego/wegobackend/group/v2/domain/repository/GroupUserV2Repository.java
@@ -64,4 +64,24 @@ List<Long> findUserIdsByGroupIdAndStatuses(
     @Modifying(clearAutomatically = true, flushAutomatically = true)
     @Query("delete from GroupUserV2 gu where gu.user.id = :userId")
     void deleteByUserId(@Param("userId") Long userId);
+
+    @Query("""
+                select gu
+                from GroupUserV2 gu
+                  join fetch gu.user u
+                where gu.group.id = :groupId
+                order by gu.joinedAt asc
+            """)
+    List<GroupUserV2> findByGroupIdOrderByJoinedAtAscWithUser(@Param("groupId") Long groupId);
+
+    @Query("""
+                select gu
+                from GroupUserV2 gu
+                  join fetch gu.user u
+                where gu.group.id = :groupId
+                  and gu.status = 'ATTEND'
+                order by gu.joinedAt asc
+            """)
+    List<GroupUserV2> findAttendByGroupIdOrderByJoinedAtAscWithUser(@Param("groupId") Long groupId);
+
 }