diff --git a/fruitshorts-app-api/src/main/java/com/fruitshorts/app/service/AppCatalogService.java b/fruitshorts-app-api/src/main/java/com/fruitshorts/app/service/AppCatalogService.java
index 0d82b01..44e5e16 100644
--- a/fruitshorts-app-api/src/main/java/com/fruitshorts/app/service/AppCatalogService.java
+++ b/fruitshorts-app-api/src/main/java/com/fruitshorts/app/service/AppCatalogService.java
@@ -107,7 +107,7 @@ public class AppCatalogService {
         Drama drama = dramaService.getPublished(dramaId);
         List<DramaEpisode> episodes = episodeService.listPublishedByDrama(dramaId);
         Map<Long, Long> episodeCommentCounts = commentService.countByEpisodes(
-                episodes.stream().map(DramaEpisode::getId).toList());
+                episodes.stream().map(DramaEpisode::getId).sorted().toList());
         String categoryName = categoryNameMap().getOrDefault(drama.getCategoryId(), "");
 
         AppDramaDetailVO detail = new AppDramaDetailVO();
@@ -173,7 +173,7 @@ public class AppCatalogService {
         List<Long> ids = dramas.stream().map(Drama::getId).toList();
         Map<Long, DramaEpisode> previews = episodeService.firstPlayableByDramas(ids);
         Map<Long, Long> commentCounts = commentService.countByEpisodes(
-                previews.values().stream().map(DramaEpisode::getId).toList());
+                previews.values().stream().map(DramaEpisode::getId).sorted().toList());
         return dramas.stream()
                 .map(drama -> toCard(
                         drama, categoryNames, previews.get(drama.getId()), commentCounts))
diff --git a/fruitshorts-app-api/src/test/java/com/fruitshorts/app/service/AppCatalogServiceTest.java b/fruitshorts-app-api/src/test/java/com/fruitshorts/app/service/AppCatalogServiceTest.java
index 1fde422..711a5be 100644
--- a/fruitshorts-app-api/src/test/java/com/fruitshorts/app/service/AppCatalogServiceTest.java
+++ b/fruitshorts-app-api/src/test/java/com/fruitshorts/app/service/AppCatalogServiceTest.java
@@ -15,6 +15,7 @@ import com.fruitshorts.media.service.PlaybackSigner;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -56,12 +57,15 @@ class AppCatalogServiceTest {
         drama.setLikeCount(3200L);
         drama.setFavoriteCount(1800L);
         drama.setViewCount(12400L);
-        DramaEpisode episode = episode(11L, 42L, 55L);
+        DramaEpisode firstEpisode = episode(11L, 42L, 55L);
+        DramaEpisode secondEpisode = episode(22L, 42L, 66L);
         given(dramaService.getPublished(42L)).willReturn(drama);
-        given(episodeService.listPublishedByDrama(42L)).willReturn(List.of(episode));
+        given(episodeService.listPublishedByDrama(42L))
+                .willReturn(List.of(secondEpisode, firstEpisode));
         given(dramaCategoryService.listBasic()).willReturn(List.of());
         given(commentService.countByDrama(42L)).willReturn(96L);
-        given(commentService.countByEpisodes(List.of(11L))).willReturn(Map.of(11L, 2L));
+        given(commentService.countByEpisodes(List.of(11L, 22L)))
+                .willReturn(Map.of(11L, 2L, 22L, 4L));
 
         AppDramaDetailVO detail = catalogService.dramaDetail(42L);
 
@@ -69,8 +73,8 @@ class AppCatalogServiceTest {
         assertThat(detail.getLikeCount()).isEqualTo(3200L);
         assertThat(detail.getFavoriteCount()).isEqualTo(1800L);
         assertThat(detail.getCommentCount()).isEqualTo(96L);
-        assertThat(detail.getEpisodes().get(0).getLikeCount()).isEqualTo(55L);
-        assertThat(detail.getEpisodes().get(0).getCommentCount()).isEqualTo(2L);
+        assertThat(detail.getEpisodes().get(0).getLikeCount()).isEqualTo(66L);
+        assertThat(detail.getEpisodes().get(0).getCommentCount()).isEqualTo(4L);
         verify(commentService).countByDrama(42L);
     }
 
@@ -90,8 +94,10 @@ class AppCatalogServiceTest {
         second.setFavoriteCount(80L);
         DramaEpisode firstEpisode = episode(11L, 1L, 320L);
         DramaEpisode secondEpisode = episode(22L, 2L, 120L);
-        given(episodeService.firstPlayableByDramas(List.of(1L, 2L)))
-                .willReturn(Map.of(1L, firstEpisode, 2L, secondEpisode));
+        Map<Long, DramaEpisode> previews = new LinkedHashMap<>();
+        previews.put(2L, secondEpisode);
+        previews.put(1L, firstEpisode);
+        given(episodeService.firstPlayableByDramas(List.of(1L, 2L))).willReturn(previews);
         given(dramaCategoryService.listBasic()).willReturn(List.of());
         given(commentService.countByEpisodes(List.of(11L, 22L)))
                 .willReturn(Map.of(11L, 9L));