diff --git a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ShopCustomizeSelector.cs b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ShopCustomizeSelector.cs
index be5b840d..4f252e8e 100644
--- a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ShopCustomizeSelector.cs
+++ b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ShopCustomizeSelector.cs
@@ -25,12 +25,12 @@ namespace MyGame.Scenes.marketing.Scripts
 
         public void Initialize()
         {
-            var content = scrollRect.content;
-            content.DestroyAllChildrens();
+            var viewport = scrollRect.viewport;
+            viewport.DestroyAllChildrens();
             var categories = (ShopCustomizeCategory[])Enum.GetValues(typeof(ShopCustomizeCategory));
             foreach (var category in categories)
             {
-                targetDict.Add(category, Instantiate(listPrefab, content));
+                targetDict.Add(category, Instantiate(listPrefab, viewport));
             }
             buttonDict.Add(ShopCustomizeCategory.Category1, signBoardButton);
             buttonDict.Add(ShopCustomizeCategory.Category2, decoration1Button);
@@ -39,11 +39,13 @@ namespace MyGame.Scenes.marketing.Scripts
             buttonDict.Add(ShopCustomizeCategory.Category5, decoration2Button);
             // buttonDict.Add(ShopCustomizeCategory.Category6, category6Button);
             
-            initializeCompositeDisposable.Dispose();
+            initializeCompositeDisposable.Clear();
             buttonDict.Select(pair => pair.Value.OnClickObservable.Select(_ => pair.Key))
                 .Merge()
+                .StartWith(ShopCustomizeCategory.Category1)
                 .ThrottleFirst(TimeSpan.FromSeconds(.2f))
-                .Subscribe(ChangeCategory).AddTo(initializeCompositeDisposable);
+                .Subscribe(ChangeCategory)
+                .AddTo(initializeCompositeDisposable);
         }
 
         public ShopCustomizeItem GenerateItem(ShopCustomizeCategory category)
@@ -68,8 +70,9 @@ namespace MyGame.Scenes.marketing.Scripts
             foreach (var pair in targetDict)
             {
                 pair.Value.gameObject.SetActive(pair.Key == category);
-                buttonDict[pair.Key]?.SetActive(pair.Key == category);
+                buttonDict[pair.Key].SetActive(pair.Key == category);
             }
+            scrollRect.content = targetDict[category] as RectTransform;
         }
     }
 }
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