diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs
index ebe8aa4..28aacfc 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs
@@ -143,8 +143,6 @@ namespace Cysharp.Threading.Tasks
                 TaskPool.RegisterSizeGetter(typeof(TweenConfiguredSource), () => pool.Size);
             }
 
-            static readonly TweenCallback EmptyTweenCallback = () => { };
-
             readonly TweenCallback onCompleteCallbackDelegate;
             readonly TweenCallback onUpdateDelegate;
 
@@ -155,6 +153,7 @@ namespace Cysharp.Threading.Tasks
             bool canceled;
 
             TweenCallback originalUpdateAction;
+            TweenCallback originalCompleteAction;
             UniTaskCompletionSourceCore<AsyncUnit> core;
 
             TweenConfiguredSource()
@@ -194,27 +193,38 @@ namespace Cysharp.Threading.Tasks
                 switch (callbackType)
                 {
                     case CallbackType.Kill:
+                        result.originalCompleteAction = tween.onKill;
                         tween.onKill = result.onCompleteCallbackDelegate;
                         break;
                     case CallbackType.Complete:
+                        result.originalCompleteAction = tween.onComplete;
                         tween.onComplete = result.onCompleteCallbackDelegate;
                         break;
                     case CallbackType.Pause:
+                        result.originalCompleteAction = tween.onPause;
                         tween.onPause = result.onCompleteCallbackDelegate;
                         break;
                     case CallbackType.Play:
+                        result.originalCompleteAction = tween.onPlay;
                         tween.onPlay = result.onCompleteCallbackDelegate;
                         break;
                     case CallbackType.Rewind:
+                        result.originalCompleteAction = tween.onRewind;
                         tween.onRewind = result.onCompleteCallbackDelegate;
                         break;
                     case CallbackType.StepComplete:
+                        result.originalCompleteAction = tween.onStepComplete;
                         tween.onStepComplete = result.onCompleteCallbackDelegate;
                         break;
                     default:
                         break;
                 }
 
+                if (result.originalCompleteAction == result.onCompleteCallbackDelegate)
+                {
+                    result.originalCompleteAction = null;
+                }
+
                 TaskTracker.TrackActiveTask(result, 3);
 
                 token = result.core.Version;
@@ -240,6 +250,7 @@ namespace Cysharp.Threading.Tasks
                 }
                 else
                 {
+                    originalCompleteAction?.Invoke();
                     core.TrySetResult(AsyncUnit.Default);
                 }
             }
@@ -285,26 +296,26 @@ namespace Cysharp.Threading.Tasks
                         this.tween.Complete(true);
                         break;
                     case TweenCancelBehaviour.CancelAwait:
-                        // replace to empty(avoid callback after Canceled(instance is returned to pool.)
+                        // restore to original callback
                         switch (callbackType)
                         {
                             case CallbackType.Kill:
-                                tween.onKill = EmptyTweenCallback;
+                                tween.onKill = originalCompleteAction;
                                 break;
                             case CallbackType.Complete:
-                                tween.onComplete = EmptyTweenCallback;
+                                tween.onComplete = originalCompleteAction;
                                 break;
                             case CallbackType.Pause:
-                                tween.onPause = EmptyTweenCallback;
+                                tween.onPause = originalCompleteAction;
                                 break;
                             case CallbackType.Play:
-                                tween.onPlay = EmptyTweenCallback;
+                                tween.onPlay = originalCompleteAction;
                                 break;
                             case CallbackType.Rewind:
-                                tween.onRewind = EmptyTweenCallback;
+                                tween.onRewind = originalCompleteAction;
                                 break;
                             case CallbackType.StepComplete:
-                                tween.onStepComplete = EmptyTweenCallback;
+                                tween.onStepComplete = originalCompleteAction;
                                 break;
                             default:
                                 break;
@@ -386,22 +397,22 @@ namespace Cysharp.Threading.Tasks
                 switch (callbackType)
                 {
                     case CallbackType.Kill:
-                        tween.onKill = null;
+                        tween.onKill = originalCompleteAction;
                         break;
                     case CallbackType.Complete:
-                        tween.onComplete = null;
+                        tween.onComplete = originalCompleteAction;
                         break;
                     case CallbackType.Pause:
-                        tween.onPause = null;
+                        tween.onPause = originalCompleteAction;
                         break;
                     case CallbackType.Play:
-                        tween.onPlay = null;
+                        tween.onPlay = originalCompleteAction;
                         break;
                     case CallbackType.Rewind:
-                        tween.onRewind = null;
+                        tween.onRewind = originalCompleteAction;
                         break;
                     case CallbackType.StepComplete:
-                        tween.onStepComplete = null;
+                        tween.onStepComplete = originalCompleteAction;
                         break;
                     default:
                         break;
@@ -410,6 +421,7 @@ namespace Cysharp.Threading.Tasks
                 tween = default;
                 cancellationToken = default;
                 originalUpdateAction = default;
+                originalCompleteAction = default;
                 return pool.TryPush(this);
             }
         }