diff --git a/My project/Assets/FlowScope/Runtime/Audio/AudioService.cs b/My project/Assets/FlowScope/Runtime/Audio/AudioService.cs
index 884e467..f3ea89d 100644
--- a/My project/Assets/FlowScope/Runtime/Audio/AudioService.cs	
+++ b/My project/Assets/FlowScope/Runtime/Audio/AudioService.cs	
@@ -211,6 +211,10 @@ namespace FlowScope.Audio
                 var handle = await _resources.LoadAsync<AudioClip>(key, cancellationToken);
                 return ValidateLoadedClip(key, handle);
             }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
             catch (Exception exception)
             {
                 throw new InvalidOperationException($"Failed to load audio clip '{key}'.", exception);
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/Audio/AudioServiceTests.cs b/My project/Assets/FlowScope/Tests/PlayMode/Audio/AudioServiceTests.cs
index 7ddc1b8..ba9bae4 100644
--- a/My project/Assets/FlowScope/Tests/PlayMode/Audio/AudioServiceTests.cs	
+++ b/My project/Assets/FlowScope/Tests/PlayMode/Audio/AudioServiceTests.cs	
@@ -209,6 +209,34 @@ namespace FlowScope.Tests.PlayMode.Audio
             Assert.That(handle.IsPlaying, Is.True);
         }
 
+        [UnityTest]
+        public System.Collections.IEnumerator PlayBgmAsync_WhenCanceled_ThrowsOperationCanceledException()
+        {
+            var service = CreateService();
+            using var cts = new CancellationTokenSource();
+            cts.Cancel();
+            var sourceCountBeforePlay = Object.FindObjectsOfType<AudioSource>().Length;
+
+            yield return ThrowsAsync<OperationCanceledException>(
+                service.PlayBgmAsync("bgm-a", cancellationToken: cts.Token));
+
+            Assert.That(Object.FindObjectsOfType<AudioSource>().Length, Is.EqualTo(sourceCountBeforePlay));
+        }
+
+        [UnityTest]
+        public System.Collections.IEnumerator PlaySfxAsync_WhenCanceled_ThrowsOperationCanceledException()
+        {
+            var service = CreateService();
+            using var cts = new CancellationTokenSource();
+            cts.Cancel();
+            var sourceCountBeforePlay = Object.FindObjectsOfType<AudioSource>().Length;
+
+            yield return ThrowsAsync<OperationCanceledException>(
+                service.PlaySfxAsync("sfx", cts.Token));
+
+            Assert.That(Object.FindObjectsOfType<AudioSource>().Length, Is.EqualTo(sourceCountBeforePlay));
+        }
+
         private AudioService CreateService(AudioServiceConfig config = null)
         {
             var gameObject = new GameObject("AudioServiceTest");
@@ -249,6 +277,27 @@ namespace FlowScope.Tests.PlayMode.Audio
             onCompleted(task.Result);
         }
 
+        private static System.Collections.IEnumerator ThrowsAsync<TException>(Task task)
+            where TException : Exception
+        {
+            while (!task.IsCompleted)
+            {
+                yield return null;
+            }
+
+            if (task.IsFaulted && task.Exception?.GetBaseException() is TException)
+            {
+                yield break;
+            }
+
+            if (task.IsCanceled && typeof(TException) == typeof(OperationCanceledException))
+            {
+                yield break;
+            }
+
+            Assert.Fail($"Expected {typeof(TException).Name}.");
+        }
+
         private static AudioClip CreateClip(string name, float lengthSeconds)
         {
             var sampleCount = Mathf.CeilToInt(44100 * lengthSeconds);
@@ -285,6 +334,7 @@ namespace FlowScope.Tests.PlayMode.Audio
                 where T : class
             {
                 LoadRequests++;
+                cancellationToken.ThrowIfCancellationRequested();
                 if (typeof(T) != typeof(AudioClip))
                 {
                     throw new InvalidOperationException($"missing resource: {key}");