diff --git a/popcorn/Assets/MyGame/Scripts/TransitionManager.cs b/popcorn/Assets/MyGame/Scripts/TransitionManager.cs
new file mode 100644
index 00000000..694a3dc8
--- /dev/null
+++ b/popcorn/Assets/MyGame/Scripts/TransitionManager.cs
@@ -0,0 +1,136 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public enum GameScenes
+{
+    Main,
+    Cooking,
+    CornField,
+    SettingsDialog,
+    DebugOption,
+    UnableWatchVideoDialog,
+    ApplicationExitConfirmDialog,
+}
+
+public enum SceneType
+{
+    Default,
+    ManualUnloadOnly
+}
+
+public sealed class TransitionManager : SingletonMonoBehaviour<TransitionManager>
+{
+    private List<(SceneType, GameScenes)> loadedSceneList = new List<(SceneType, GameScenes)>();
+
+//     void Awake(){
+// #if UNITY_EDITOR
+//         GameScenes currentScene;
+//         try{
+//             currentScene = (GameScenes)Enum.Parse(typeof(GameScenes), SceneManager.GetActiveScene().name, false);
+//         }catch{
+//             currentScene = GameScenes.TransitionManager;
+//         }
+//         if(currentScene != GameScenes.TransitionManager){
+//             loadedSceneList.Add((SceneType.Default, currentScene));
+//             SceneManager.LoadScene("TransitionManager", LoadSceneMode.Additive);
+//             return ;
+//         }
+// #endif
+
+//         TransitionManager.Instance.LoadScene(GameScenes.Main);
+//     }
+
+    public void LoadScene(GameScenes scene)
+    {
+        SceneManager.LoadScene(scene.ToString());
+//        StartCoroutine(_LoadScene(scene));
+    }
+
+//     private IEnumerator _LoadScene(GameScenes scene){
+// /*
+//         yield return StartCoroutine(_ResetScene());
+//         yield return Resources.UnloadUnusedAssets();
+//         GC.Collect();
+//         yield return StartCoroutine(_LoadSceneAdditive(scene, SceneType.Default));
+//         SceneManager.SetActiveScene(SceneManager.GetSceneByName(scene.ToString()));
+// /*/
+//         for(int i = loadedSceneList.Count - 1; i >= 0; --i){
+//             if(loadedSceneList[i].Item1 != SceneType.ManualUnloadOnly){
+//                 SceneManager.UnloadScene(loadedSceneList[i].Item2.ToString());
+//                 loadedSceneList.RemoveAt(i);
+//             }
+//         }
+//         Resources.UnloadUnusedAssets();
+//         GC.Collect();
+//         SceneManager.LoadScene(scene.ToString(), LoadSceneMode.Additive);
+//         loadedSceneList.Add((SceneType.Default, scene));
+//         while(true){
+//             yield return null;
+//             try{
+//                 SceneManager.SetActiveScene(SceneManager.GetSceneByName(scene.ToString()));
+//             }catch(Exception){
+//                 continue;
+//             }
+//             break;
+//         }
+// //*/
+//     }
+    public void LoadSceneAdditive(GameScenes scene, SceneType sceneType = SceneType.Default)
+    {
+        StartCoroutine(_LoadSceneAdditive(scene, sceneType));
+    }
+
+    private IEnumerator _LoadSceneAdditive(GameScenes scene, SceneType sceneType)
+    {
+        yield return SceneManager.LoadSceneAsync(scene.ToString(), LoadSceneMode.Additive);
+        loadedSceneList.Add((sceneType, scene));
+    }
+
+    public void UnloadScene(GameScenes scene)
+    {
+        UnloadScene(scene, ActionExtensions.EmptyAction);
+    }
+
+    public void UnloadScene(GameScenes scene, Action callback)
+    {
+        StartCoroutine(_UnloadScene(scene, callback));
+    }
+
+    private IEnumerator _UnloadScene(GameScenes scene, Action callback)
+    {
+        yield return SceneManager.UnloadSceneAsync(scene.ToString());
+        loadedSceneList.Remove(loadedSceneList.Find(t => t.Item2 == scene));
+        callback();
+    }
+
+    private IEnumerator _ResetScene()
+    {
+        List<Coroutine> coroutineList = new List<Coroutine>();
+        for (int i = loadedSceneList.Count - 1; i >= 0; --i)
+        {
+            if (loadedSceneList[i].Item1 != SceneType.ManualUnloadOnly)
+            {
+                coroutineList.Add(StartCoroutine(_UnloadScene(loadedSceneList[i].Item2, ActionExtensions.EmptyAction)));
+                loadedSceneList.RemoveAt(i);
+            }
+        }
+
+        foreach (var coroutine in coroutineList)
+        {
+            yield return coroutine;
+        }
+    }
+
+    public bool Exists(GameScenes scene)
+    {
+        foreach (var tuple in loadedSceneList)
+        {
+            if (tuple.Item2 == scene) return true;
+        }
+
+        return false;
+    }
+}
diff --git a/popcorn/Assets/MyGame/Scripts/TransitionManager.cs.meta b/popcorn/Assets/MyGame/Scripts/TransitionManager.cs.meta
new file mode 100644
index 00000000..91606542
--- /dev/null
+++ b/popcorn/Assets/MyGame/Scripts/TransitionManager.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 77ded0026daa40d4b872efbaf2c1195c
+timeCreated: 1626237734
\ No newline at end of file