diff --git a/GameServer/Game/Player/PlayerInstance.cs b/GameServer/Game/Player/PlayerInstance.cs
index 73e206f..e7cd9d4 100644
--- a/GameServer/Game/Player/PlayerInstance.cs
+++ b/GameServer/Game/Player/PlayerInstance.cs
@@ -213,7 +213,7 @@ public class PlayerInstance(PlayerGameData data)
         Data.ShowItems[index - 1] = itemId;
     }
 
-    private static uint ToPackedAttrKey(uint gid, uint sid)
+    public uint ToPackedAttrKey(uint gid, uint sid)
     {
         if (gid == 0)
             return sid;
@@ -221,7 +221,7 @@ public class PlayerInstance(PlayerGameData data)
         return (gid * 10000) + sid;
     }
 
-    private static uint ToShiftedAttrKey(uint gid, uint sid)
+    public uint ToShiftedAttrKey(uint gid, uint sid)
     {
         if (gid == 0)
             return sid;
@@ -272,6 +272,9 @@ public class PlayerInstance(PlayerGameData data)
             yield return (21, levelId, 7);
             yield return (22, levelId, 1_700_000_000);
         }
+
+        // Main Scene 0 mean default scene
+        yield return (132, 1, 0);
     }
     #endregion
 }
\ No newline at end of file
diff --git a/GameServer/Server/CallGS/Handlers/Scene/ChangeMainScene.cs b/GameServer/Server/CallGS/Handlers/Scene/ChangeMainScene.cs
index 874b264..09fd335 100644
--- a/GameServer/Server/CallGS/Handlers/Scene/ChangeMainScene.cs
+++ b/GameServer/Server/CallGS/Handlers/Scene/ChangeMainScene.cs
@@ -1,13 +1,51 @@
-namespace MikuSB.GameServer.Server.CallGS.Handlers.Scene;
+using MikuSB.Database.Player;
+using MikuSB.Proto;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MikuSB.GameServer.Server.CallGS.Handlers.Scene;
 
 // Response:{sErr:true or false}
 [CallGSApi("ChangeMainScene")]
 public class ChangeMainScene : ICallGSHandler
 {
+    private const int MainSceneGID = 132;
+    private const int MainSceneSID = 1;
+
     public async Task Handle(Connection connection, string param, ushort seqNo)
     {
         string rsp = $"{{\"sErr\":false}}";
-        // TODO change scene with ExtraSync
-        await CallGSRouter.SendScript(connection, "ChangeMainScene", rsp);
+        var req = JsonSerializer.Deserialize<ChangeMainSceneParam>(param);
+        if (req == null) 
+        {
+            await CallGSRouter.SendScript(connection, "ChangeMainScene", rsp);
+            return;
+        } 
+
+        var player = connection.Player!;
+        var mainSceneAttr = player.Data.Attrs
+            .FirstOrDefault(x => x.Gid == MainSceneGID && x.Sid == MainSceneSID);
+
+        if (mainSceneAttr == null)
+        {
+            mainSceneAttr = new PlayerAttr
+            {
+                Gid = MainSceneGID,
+                Sid = MainSceneSID
+            };
+            player.Data.Attrs.Add(mainSceneAttr);
+        }
+        var sync = new NtfSyncPlayer();
+        mainSceneAttr.Val = req.Id;
+
+        sync.Custom[player.ToPackedAttrKey(MainSceneGID, MainSceneSID)] = mainSceneAttr.Val;
+        sync.Custom[player.ToShiftedAttrKey(MainSceneGID, MainSceneSID)] = mainSceneAttr.Val;
+        await CallGSRouter.SendScript(connection, "ChangeMainScene", rsp, sync);
     }
+}
+
+internal sealed class ChangeMainSceneParam
+{
+    [JsonPropertyName("nId")]
+    public uint Id { get; set; }
 }
\ No newline at end of file