diff --git a/app/src/main/java/jp/panta/misskeyandroidclient/ui/main/viewmodel/MainViewModel.kt b/app/src/main/java/jp/panta/misskeyandroidclient/ui/main/viewmodel/MainViewModel.kt
index 0713956c9b..987828c0c1 100644
--- a/app/src/main/java/jp/panta/misskeyandroidclient/ui/main/viewmodel/MainViewModel.kt
+++ b/app/src/main/java/jp/panta/misskeyandroidclient/ui/main/viewmodel/MainViewModel.kt
@@ -11,6 +11,7 @@ import kotlinx.coroutines.launch
 import net.pantasystem.milktea.app_store.account.AccountStore
 import net.pantasystem.milktea.app_store.setting.SettingStore
 import net.pantasystem.milktea.common.Logger
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.mapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.model.emoji.EmojiEventHandler
@@ -118,7 +119,7 @@ class MainViewModel @Inject constructor(
 
     fun onPushNotificationConfirmed() {
         viewModelScope.launch {
-            configRepository.get().mapCancellableCatching {
+            configRepository.get().flatMapCancellableCatching{
                 configRepository.save(it.copy(isConfirmedPostNotification = true))
             }.onFailure {
                 logger.error("設定状態の保存に失敗", it)
diff --git a/modules/common/src/main/java/net/pantasystem/milktea/common/ResultHelper.kt b/modules/common/src/main/java/net/pantasystem/milktea/common/ResultHelper.kt
index 8a1d1f6e91..89a15c33ef 100644
--- a/modules/common/src/main/java/net/pantasystem/milktea/common/ResultHelper.kt
+++ b/modules/common/src/main/java/net/pantasystem/milktea/common/ResultHelper.kt
@@ -39,4 +39,17 @@ inline fun <R, T> Result<T>.mapCancellableCatching(transform: (value: T) -> R):
     } catch (e: Exception) {
         return Result.failure(e)
     }
+}
+
+inline fun<R, T> Result<T>.flatMapCancellableCatching(transform: (value: T) -> Result<R>): Result<R> {
+    return try {
+        val result = getOrThrow()
+        transform(result)
+    } catch (e: CancellationException) {
+        throw e
+    } catch (e: OutOfMemoryError) {
+        throw e
+    } catch (e: Exception) {
+        return Result.failure(e)
+    }
 }
\ No newline at end of file
diff --git a/modules/features/drive/src/main/java/net/pantasystem/milktea/drive/viewmodel/DriveViewModel.kt b/modules/features/drive/src/main/java/net/pantasystem/milktea/drive/viewmodel/DriveViewModel.kt
index 84cc6f0f77..f0d915eebe 100644
--- a/modules/features/drive/src/main/java/net/pantasystem/milktea/drive/viewmodel/DriveViewModel.kt
+++ b/modules/features/drive/src/main/java/net/pantasystem/milktea/drive/viewmodel/DriveViewModel.kt
@@ -26,7 +26,7 @@ import net.pantasystem.milktea.app_store.handler.UserActionAppGlobalErrorStore
 import net.pantasystem.milktea.common.Logger
 import net.pantasystem.milktea.common.PageableState
 import net.pantasystem.milktea.common.convert
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.common_android.resource.StringSource
 import net.pantasystem.milktea.common_navigation.EXTRA_ACCOUNT_ID
@@ -196,7 +196,7 @@ class DriveViewModel @Inject constructor(
 
     fun setUsingGridView(value: Boolean) {
         viewModelScope.launch {
-            configRepository.get().mapCancellableCatching { config ->
+            configRepository.get().flatMapCancellableCatching { config ->
                 configRepository.save(
                     config.copy(isDriveUsingGridView = value)
                 )
diff --git a/modules/features/note/src/main/java/net/pantasystem/milktea/note/viewmodel/NotesViewModel.kt b/modules/features/note/src/main/java/net/pantasystem/milktea/note/viewmodel/NotesViewModel.kt
index 665e8a5800..a87851f416 100644
--- a/modules/features/note/src/main/java/net/pantasystem/milktea/note/viewmodel/NotesViewModel.kt
+++ b/modules/features/note/src/main/java/net/pantasystem/milktea/note/viewmodel/NotesViewModel.kt
@@ -12,6 +12,7 @@ import net.pantasystem.milktea.app_store.handler.UserActionAppGlobalErrorAction
 import net.pantasystem.milktea.app_store.handler.UserActionAppGlobalErrorStore
 import net.pantasystem.milktea.app_store.notes.NoteTranslationStore
 import net.pantasystem.milktea.common.Logger
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.mapCancellableCatching
 import net.pantasystem.milktea.common_android.resource.StringSource
 import net.pantasystem.milktea.model.note.DeleteAndEditUseCase
@@ -316,7 +317,7 @@ class NotesViewModel @Inject constructor(
         viewModelScope.launch {
             configRepository.get().mapCancellableCatching {
                 it.copy(isShowWarningDisplayingSensitiveMedia = false)
-            }.mapCancellableCatching {
+            }.flatMapCancellableCatching {
                 configRepository.save(it)
             }.onFailure {
                 logger.error("警告表示の抑制に失敗", it)
diff --git a/modules/features/notification/src/main/java/net/pantasystem/milktea/notification/viewmodel/NotificationViewModel.kt b/modules/features/notification/src/main/java/net/pantasystem/milktea/notification/viewmodel/NotificationViewModel.kt
index 25d08fcadc..430eaf26ec 100644
--- a/modules/features/notification/src/main/java/net/pantasystem/milktea/notification/viewmodel/NotificationViewModel.kt
+++ b/modules/features/notification/src/main/java/net/pantasystem/milktea/notification/viewmodel/NotificationViewModel.kt
@@ -152,7 +152,7 @@ class NotificationViewModel @Inject constructor(
                 if (it == 0) {
                     runCancellableCatching {
                         getCurrentAccount()
-                    }.mapCancellableCatching {
+                    }.flatMapCancellableCatching {
                         notificationRepository.markAsRead(it.accountId)
                     }.onFailure { e ->
                         logger.error("failed mark as read", e)
@@ -235,7 +235,7 @@ class NotificationViewModel @Inject constructor(
         viewModelScope.launch {
             runCancellableCatching {
                 getCurrentAccount()
-            }.mapCancellableCatching {
+            }.flatMapCancellableCatching {
                 notificationRepository.markAsRead(it.accountId)
             }.onSuccess {
                 loadInit()
diff --git a/modules/features/setting/src/main/java/net/pantasystem/milktea/setting/viewmodel/muteword/ClientWordFilterSettingViewModel.kt b/modules/features/setting/src/main/java/net/pantasystem/milktea/setting/viewmodel/muteword/ClientWordFilterSettingViewModel.kt
index 8ca495c8d7..7293ec2c42 100644
--- a/modules/features/setting/src/main/java/net/pantasystem/milktea/setting/viewmodel/muteword/ClientWordFilterSettingViewModel.kt
+++ b/modules/features/setting/src/main/java/net/pantasystem/milktea/setting/viewmodel/muteword/ClientWordFilterSettingViewModel.kt
@@ -7,7 +7,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.launch
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.model.note.muteword.WordFilterConfigRepository
 import net.pantasystem.milktea.model.note.muteword.WordFilterConfigTextParser
 import javax.inject.Inject
@@ -23,8 +23,8 @@ class ClientWordFilterSettingViewModel @Inject constructor(
 
     init {
         viewModelScope.launch {
-            repository.get().mapCancellableCatching {
-                WordFilterConfigTextParser.fromConfig(it).getOrThrow()
+            repository.get().flatMapCancellableCatching {
+                WordFilterConfigTextParser.fromConfig(it)
             }.onSuccess {
                 muteWordsFieldState = it
             }
@@ -37,8 +37,8 @@ class ClientWordFilterSettingViewModel @Inject constructor(
 
     fun save() {
         viewModelScope.launch {
-            WordFilterConfigTextParser.fromText(muteWordsFieldState).mapCancellableCatching {
-                repository.save(it).getOrThrow()
+            WordFilterConfigTextParser.fromText(muteWordsFieldState).flatMapCancellableCatching {
+                repository.save(it)
             }.onSuccess {
 
             }
diff --git a/modules/features/user/src/main/java/net/pantasystem/milktea/user/profile/viewmodel/UserDetailViewModel.kt b/modules/features/user/src/main/java/net/pantasystem/milktea/user/profile/viewmodel/UserDetailViewModel.kt
index 67a84a7c82..4ead410324 100644
--- a/modules/features/user/src/main/java/net/pantasystem/milktea/user/profile/viewmodel/UserDetailViewModel.kt
+++ b/modules/features/user/src/main/java/net/pantasystem/milktea/user/profile/viewmodel/UserDetailViewModel.kt
@@ -16,6 +16,7 @@ import net.pantasystem.milktea.app_store.account.AccountStore
 import net.pantasystem.milktea.app_store.handler.AppGlobalError
 import net.pantasystem.milktea.app_store.handler.UserActionAppGlobalErrorStore
 import net.pantasystem.milktea.common.Logger
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.mapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.common_android.resource.StringSource
@@ -208,8 +209,8 @@ class UserDetailViewModel @Inject constructor(
 
     private fun sync() {
         viewModelScope.launch {
-            getUserId().mapCancellableCatching { userId ->
-                userRepository.sync(userId).getOrThrow()
+            getUserId().flatMapCancellableCatching { userId ->
+                userRepository.sync(userId)
             }.onFailure {
                 logger.error("user sync error", it)
                 userActionAppGlobalErrorStore.dispatch(
@@ -358,8 +359,8 @@ class UserDetailViewModel @Inject constructor(
 
     fun toggleUserTimelineTab() {
         viewModelScope.launch {
-            getUserId().mapCancellableCatching {
-                toggleUserTimelineAddTabUseCase(it).getOrThrow()
+            getUserId().flatMapCancellableCatching {
+                toggleUserTimelineAddTabUseCase(it)
             }.onFailure {
                 logger.error("toggle user timeline tab failed", it)
                 userActionAppGlobalErrorStore.dispatch(
@@ -376,8 +377,8 @@ class UserDetailViewModel @Inject constructor(
 
     fun toggleNotifyUserPosts() {
         viewModelScope.launch {
-            getUserId().mapCancellableCatching {
-                toggleNotifyUserPostsUseCase(it).getOrThrow()
+            getUserId().flatMapCancellableCatching {
+                toggleNotifyUserPostsUseCase(it)
             }.onFailure {
                 logger.error("toggle user notify posts failed", it)
                 userActionAppGlobalErrorStore.dispatch(
@@ -394,8 +395,8 @@ class UserDetailViewModel @Inject constructor(
 
     fun muteRenotes() {
         viewModelScope.launch {
-            getUserId().mapCancellableCatching {
-                renoteMuteRepository.create(it).getOrThrow()
+            getUserId().flatMapCancellableCatching {
+                renoteMuteRepository.create(it)
             }.onFailure {
                 userActionAppGlobalErrorStore.dispatch(
                     AppGlobalError(
@@ -411,8 +412,8 @@ class UserDetailViewModel @Inject constructor(
 
     fun unMuteRenotes() {
         viewModelScope.launch {
-            getUserId().mapCancellableCatching {
-                renoteMuteRepository.delete(it).getOrThrow()
+            getUserId().flatMapCancellableCatching {
+                renoteMuteRepository.delete(it)
             }.onFailure {
                 userActionAppGlobalErrorStore.dispatch(
                     AppGlobalError(
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/note/NoteRelationGetter.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/note/NoteRelationGetter.kt
index 7599ff05f3..bc7a0491ae 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/note/NoteRelationGetter.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/note/NoteRelationGetter.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.note
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.model.drive.FileProperty
 import net.pantasystem.milktea.model.drive.FilePropertyDataSource
@@ -35,14 +35,14 @@ class NoteRelationGetter @Inject constructor(
                 }
 
             }
-        }.mapCancellableCatching {
+        }.flatMapCancellableCatching {
             get(
                 it,
                 deep,
                 usersMap = usersMap,
                 notesMap = notesMap,
                 filesMap = filesMap,
-            ).getOrThrow()
+            )
         }
     }
 
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/note/reaction/ToggleReactionUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/note/reaction/ToggleReactionUseCase.kt
index 5e765e1f45..a2a42914ce 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/note/reaction/ToggleReactionUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/note/reaction/ToggleReactionUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.note.reaction
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.account.Account
@@ -85,8 +85,8 @@ class ToggleReactionUseCase @Inject constructor(
 
             // NOTE: Suggestionを表示するためにユーザのデータが必要になるので、キャッシュを更新しておく
             userRepository.sync(note.userId).getOrThrow()
-        }.mapCancellableCatching {
-            noteRepository.sync(noteId).getOrThrow()
+        }.flatMapCancellableCatching {
+            noteRepository.sync(noteId)
         }
     }
 
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/user/ToggleFollowUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/user/ToggleFollowUseCase.kt
index 1bbef4993e..b92af7a943 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/user/ToggleFollowUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/user/ToggleFollowUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.user
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.common.runCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.user.follow.FollowRepository
@@ -21,7 +21,7 @@ class ToggleFollowUseCase @Inject constructor(
             } else {
                 followRepository.create(userId)
             }
-        }.mapCancellableCatching {
+        }.flatMapCancellableCatching {
             userRepository.sync(userId)
         }
     }
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/BlockUserUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/BlockUserUseCase.kt
index bc64909536..d516ed5c89 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/BlockUserUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/BlockUserUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.user.block
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.user.User
 import net.pantasystem.milktea.model.user.UserRepository
@@ -12,8 +12,8 @@ class BlockUserUseCase @Inject constructor(
 ): UseCase {
 
     suspend operator fun invoke(userId: User.Id): Result<Unit> {
-        return blockRepository.create(userId).mapCancellableCatching {
-            userRepository.sync(userId).getOrThrow()
+        return blockRepository.create(userId).flatMapCancellableCatching {
+            userRepository.sync(userId)
         }
     }
 }
\ No newline at end of file
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/UnBlockUserUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/UnBlockUserUseCase.kt
index f4502421ec..d500ba0bb5 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/UnBlockUserUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/user/block/UnBlockUserUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.user.block
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.user.User
 import net.pantasystem.milktea.model.user.UserRepository
@@ -12,8 +12,8 @@ class UnBlockUserUseCase @Inject constructor(
 ) : UseCase {
 
     suspend operator fun invoke(userId: User.Id): Result<Unit> {
-        return blockRepository.delete(userId).mapCancellableCatching {
-            userRepository.sync(userId).getOrThrow()
+        return blockRepository.delete(userId).flatMapCancellableCatching {
+            userRepository.sync(userId)
         }
     }
 }
\ No newline at end of file
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/MuteUserUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/MuteUserUseCase.kt
index 72922f4b83..c0647e4979 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/MuteUserUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/MuteUserUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.user.mute
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.user.UserRepository
 import javax.inject.Inject
@@ -11,8 +11,8 @@ class MuteUserUseCase @Inject constructor(
 ): UseCase {
 
     suspend operator fun invoke(createMute: CreateMute): Result<Unit> {
-        return muteRepository.create(createMute).mapCancellableCatching {
-            userRepository.sync(createMute.userId).getOrThrow()
+        return muteRepository.create(createMute).flatMapCancellableCatching {
+            userRepository.sync(createMute.userId)
         }
     }
 }
\ No newline at end of file
diff --git a/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/UnMuteUserUseCase.kt b/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/UnMuteUserUseCase.kt
index 511361b1e2..d0d17b2cf3 100644
--- a/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/UnMuteUserUseCase.kt
+++ b/modules/model/src/main/java/net/pantasystem/milktea/model/user/mute/UnMuteUserUseCase.kt
@@ -1,6 +1,6 @@
 package net.pantasystem.milktea.model.user.mute
 
-import net.pantasystem.milktea.common.mapCancellableCatching
+import net.pantasystem.milktea.common.flatMapCancellableCatching
 import net.pantasystem.milktea.model.UseCase
 import net.pantasystem.milktea.model.user.User
 import net.pantasystem.milktea.model.user.UserRepository
@@ -12,8 +12,8 @@ class UnMuteUserUseCase @Inject constructor(
 ) : UseCase {
 
     suspend operator fun invoke(userId: User.Id): Result<Unit> {
-        return muteRepository.delete(userId).mapCancellableCatching {
-            userRepository.sync(userId).getOrThrow()
+        return muteRepository.delete(userId).flatMapCancellableCatching {
+            userRepository.sync(userId)
         }
     }
 }
\ No newline at end of file