diff --git a/popcorn/Assets/MyGame/Scripts/GameDataManager.cs b/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
index fba45f20..213ccb43 100644
--- a/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
+++ b/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
@@ -128,6 +128,10 @@ public sealed class GameData {
     [DataMember(Name = "Data37")] 
     public long kitchenRefreshTime= DateTime.UtcNow.ToBinary();
     
+    // tutorial
+    [DataMember(Name = "Data38")] 
+    public bool isFirstPlay;
+    
     // mission
     [DataMember(Name = "Data1001")] 
     public int TotalAddCoin { get; private set; }