diff --git a/html/src/app.js b/html/src/app.js
index eb71e7ba..1b24ee59 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -476,6 +476,13 @@ speechSynthesis.getVoices();
                 if (status === 404 && endpoint.substring(0, 6) === 'users/') {
                     throw new Error("404: Can't find user!");
                 }
+                if (
+                    status === 404 &&
+                    endpoint.substring(0, 7) === 'invite/' &&
+                    init.inviteId
+                ) {
+                    this.expireNotification(init.inviteId);
+                }
                 if (data.error === Object(data.error)) {
                     this.$throw(
                         data.error.status_code || status,
@@ -2218,11 +2225,9 @@ speechSynthesis.getVoices();
 
     // API: Notification
 
-    API.cachedNotifications = new Map();
     API.isNotificationsLoading = false;
 
     API.$on('LOGIN', function () {
-        this.cachedNotifications.clear();
         this.isNotificationsLoading = false;
     });
 
@@ -2254,13 +2259,19 @@ speechSynthesis.getVoices();
     });
 
     API.$on('NOTIFICATION:ACCEPT', function (args) {
-        var ref = this.cachedNotifications.get(args.params.notificationId);
-        if (typeof ref === 'undefined' || ref.$isDeleted) {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
+            if (array[i].id === args.params.notificationId) {
+                var ref = array[i];
+                break;
+            }
+        }
+        if (typeof ref === 'undefined') {
             return;
         }
+        ref.$isExpired = true;
         args.ref = ref;
-        ref.$isDeleted = true;
-        this.$emit('NOTIFICATION:@DELETE', {
+        this.$emit('NOTIFICATION:EXPIRE', {
             ref,
             params: {
                 notificationId: ref.id
@@ -2274,13 +2285,32 @@ speechSynthesis.getVoices();
     });
 
     API.$on('NOTIFICATION:HIDE', function (args) {
-        var ref = this.cachedNotifications.get(args.params.notificationId);
-        if (typeof ref === 'undefined' && ref.$isDeleted) {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
+            if (array[i].id === args.params.notificationId) {
+                var ref = array[i];
+                break;
+            }
+        }
+        if (typeof ref === 'undefined') {
             return;
         }
         args.ref = ref;
-        ref.$isDeleted = true;
-        this.$emit('NOTIFICATION:@DELETE', {
+        if (
+            ref.type === 'friendRequest' ||
+            ref.type === 'hiddenFriendRequest'
+        ) {
+            for (var i = array.length - 1; i >= 0; i--) {
+                if (array[i].id === ref.id) {
+                    array.splice(i, 1);
+                    break;
+                }
+            }
+        } else {
+            ref.$isExpired = true;
+            database.updateNotificationExpired(ref);
+        }
+        this.$emit('NOTIFICATION:EXPIRE', {
             ref,
             params: {
                 notificationId: ref.id
@@ -2289,7 +2319,13 @@ speechSynthesis.getVoices();
     });
 
     API.applyNotification = function (json) {
-        var ref = this.cachedNotifications.get(json.id);
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
+            if (array[i].id === json.id) {
+                var ref = array[i];
+                break;
+            }
+        }
         if (typeof ref === 'undefined') {
             ref = {
                 id: '',
@@ -2301,12 +2337,10 @@ speechSynthesis.getVoices();
                 seen: false,
                 created_at: '',
                 // VRCX
-                $isDeleted: false,
                 $isExpired: false,
                 //
                 ...json
             };
-            this.cachedNotifications.set(ref.id, ref);
         } else {
             Object.assign(ref, json);
             ref.$isExpired = false;
@@ -2326,36 +2360,42 @@ speechSynthesis.getVoices();
         return ref;
     };
 
-    API.expireNotifications = function () {
-        for (var ref of this.cachedNotifications.values()) {
-            ref.$isExpired = true;
+    API.expireFriendRequestNotifications = function () {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
             if (
-                ref.type === 'friendRequest' ||
-                ref.type === 'hiddenFriendRequest'
+                array[i].type === 'friendRequest' ||
+                array[i].type === 'hiddenFriendRequest'
             ) {
-                this.cachedNotifications.delete(ref.id);
+                array.splice(i, 1);
             }
         }
     };
 
-    API.deleteExpiredNotifcations = function () {
-        for (var ref of this.cachedNotifications.values()) {
-            if (ref.$isDeleted || ref.$isExpired === false) {
-                continue;
+    API.expireNotification = function (notificationId) {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
+            if (array[i].id === notificationId) {
+                var ref = array[i];
+                break;
             }
-            ref.$isDeleted = true;
-            this.$emit('NOTIFICATION:@DELETE', {
-                ref,
-                params: {
-                    notificationId: ref.id
-                }
-            });
         }
+        if (typeof ref === 'undefined') {
+            return;
+        }
+        ref.$isExpired = true;
+        database.updateNotificationExpired(ref);
+        this.$emit('NOTIFICATION:EXPIRE', {
+            ref,
+            params: {
+                notificationId: ref.id
+            }
+        });
     };
 
     API.refreshNotifications = async function () {
         this.isNotificationsLoading = true;
-        this.expireNotifications();
+        this.expireFriendRequestNotifications();
         var params = {
             n: 100,
             offset: 0
@@ -2382,7 +2422,6 @@ speechSynthesis.getVoices();
                 break;
             }
         }
-        this.deleteExpiredNotifcations();
         this.isNotificationsLoading = false;
     };
 
@@ -2512,31 +2551,33 @@ speechSynthesis.getVoices();
         });
     };
 
-    API.sendInviteResponse = function (params, inviteID) {
-        return this.call(`invite/${inviteID}/response`, {
+    API.sendInviteResponse = function (params, inviteId) {
+        return this.call(`invite/${inviteId}/response`, {
             method: 'POST',
-            params
+            params,
+            inviteId
         }).then((json) => {
             var args = {
                 json,
                 params,
-                inviteID
+                inviteId
             };
             this.$emit('INVITE:RESPONSE:SEND', args);
             return args;
         });
     };
 
-    API.sendInviteResponsePhoto = function (params, inviteID) {
-        return this.call(`invite/${inviteID}/response/photo`, {
+    API.sendInviteResponsePhoto = function (params, inviteId) {
+        return this.call(`invite/${inviteId}/response/photo`, {
             uploadImage: true,
             postData: JSON.stringify(params),
-            imageData: $app.uploadImage
+            imageData: $app.uploadImage,
+            inviteId
         }).then((json) => {
             var args = {
                 json,
                 params,
-                inviteID
+                inviteId
             };
             this.$emit('INVITE:RESPONSE:PHOTO:SEND', args);
             return args;
@@ -2586,13 +2627,13 @@ speechSynthesis.getVoices();
     };
 
     API.getFriendRequest = function (userId) {
-        for (var ref of this.cachedNotifications.values()) {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
             if (
-                ref.$isDeleted === false &&
-                ref.type === 'friendRequest' &&
-                ref.senderUserId === userId
+                array[i].type === 'friendRequest' &&
+                array[i].senderUserId === userId
             ) {
-                return ref.id;
+                return array[i].id;
             }
         }
         return '';
@@ -3506,6 +3547,11 @@ speechSynthesis.getVoices();
                 break;
 
             case 'hide-notification':
+                this.$emit('NOTIFICATION:HIDE', {
+                    params: {
+                        notificationId: content
+                    }
+                });
                 this.$emit('NOTIFICATION:SEE', {
                     params: {
                         notificationId: content
@@ -4508,9 +4554,6 @@ speechSynthesis.getVoices();
     };
 
     $app.methods.queueNotificationNoty = function (noty) {
-        if (noty.senderUserId === API.currentUser.id) {
-            return;
-        }
         noty.isFriend = this.friends.has(noty.senderUserId);
         noty.isFavorite = API.cachedFavoritesByObjectId.has(noty.senderUserId);
         var notyFilter = this.sharedFeedFilters.noty;
@@ -6875,6 +6918,8 @@ speechSynthesis.getVoices();
         await database.initUserTables(args.json.id);
         $app.feedTable.data = await database.getFeedDatabase();
         $app.sweepFeed();
+        // eslint-disable-next-line require-atomic-updates
+        $app.notificationTable.data = await database.getNotifications();
         if (configRepository.getBool(`friendLogInit_${args.json.id}`)) {
             await $app.getFriendLog();
         } else {
@@ -8615,6 +8660,20 @@ speechSynthesis.getVoices();
             this.friendLog.set(id, friendLogCurrent);
             database.setFriendLogCurrent(friendLogCurrent);
             this.notifyMenu('friendLog');
+            this.deleteFriendRequest(id);
+        }
+    };
+
+    $app.methods.deleteFriendRequest = function (userId) {
+        var array = $app.notificationTable.data;
+        for (var i = array.length - 1; i >= 0; i--) {
+            if (
+                array[i].type === 'friendRequest' &&
+                array[i].senderUserId === userId
+            ) {
+                array.splice(i, 1);
+                return;
+            }
         }
     };
 
@@ -8859,22 +8918,22 @@ speechSynthesis.getVoices();
         var {length} = array;
         for (var i = 0; i < length; ++i) {
             if (array[i].id === ref.id) {
-                if (ref.$isDeleted) {
-                    array.splice(i, 1);
-                } else {
-                    Vue.set(array, i, ref);
-                }
+                Vue.set(array, i, ref);
                 return;
             }
         }
-        if (ref.$isDeleted === false) {
-            $app.notificationTable.data.push(ref);
-            if (ref.senderUserId !== this.currentUser.id) {
-                $app.notifyMenu('notification');
-                $app.unseenNotifications.push(ref.id);
+        if (ref.senderUserId !== this.currentUser.id) {
+            if (
+                ref.type !== 'friendRequest' &&
+                ref.type !== 'hiddenFriendRequest'
+            ) {
+                database.addNotificationToDatabase(ref);
             }
+            $app.notifyMenu('notification');
+            $app.unseenNotifications.push(ref.id);
             $app.queueNotificationNoty(ref);
         }
+        $app.notificationTable.data.push(ref);
         $app.updateSharedFeed(true);
     });
 
@@ -8886,18 +8945,6 @@ speechSynthesis.getVoices();
         }
     });
 
-    API.$on('NOTIFICATION:@DELETE', function (args) {
-        var {ref} = args;
-        var array = $app.notificationTable.data;
-        var {length} = array;
-        for (var i = 0; i < length; ++i) {
-            if (array[i].id === ref.id) {
-                array.splice(i, 1);
-                return;
-            }
-        }
-    });
-
     $app.methods.acceptNotification = function (row) {
         // FIXME: 메시지 수정
         this.$confirm('Continue? Accept Friend Request', 'Confirm', {
@@ -8915,8 +8962,7 @@ speechSynthesis.getVoices();
     };
 
     $app.methods.hideNotification = function (row) {
-        // FIXME: 메시지 수정
-        this.$confirm('Continue? Delete Notification', 'Confirm', {
+        this.$confirm(`Continue? Decline ${row.type}`, 'Confirm', {
             confirmButtonText: 'Confirm',
             cancelButtonText: 'Cancel',
             type: 'info',
@@ -8939,6 +8985,25 @@ speechSynthesis.getVoices();
         });
     };
 
+    $app.methods.deleteNotificationLog = function (row) {
+        this.$confirm(`Continue? Delete ${row.type}`, 'Confirm', {
+            confirmButtonText: 'Confirm',
+            cancelButtonText: 'Cancel',
+            type: 'info',
+            callback: (action) => {
+                if (action === 'confirm') {
+                    removeFromArray(this.notificationTable.data, row);
+                    if (
+                        row.type !== 'friendRequest' &&
+                        row.type !== 'hiddenFriendRequest'
+                    ) {
+                        database.deleteNotification(row.id);
+                    }
+                }
+            }
+        });
+    };
+
     $app.methods.acceptRequestInvite = function (row) {
         this.$confirm('Continue? Send Invite', 'Confirm', {
             confirmButtonText: 'Confirm',
@@ -10146,7 +10211,7 @@ speechSynthesis.getVoices();
         D.isFriend = true;
     });
 
-    API.$on('NOTIFICATION:@DELETE', function (args) {
+    API.$on('NOTIFICATION:EXPIRE', function (args) {
         var {ref} = args;
         var D = $app.userDialog;
         if (
diff --git a/html/src/index.pug b/html/src/index.pug
index 3249d38b..af091f23 100644
--- a/html/src/index.pug
+++ b/html/src/index.pug
@@ -470,15 +470,26 @@ html
                             span(v-else-if='scope.row.details && scope.row.details.inviteMessage' v-text="scope.row.details.inviteMessage")
                             span(v-else-if='scope.row.details && scope.row.details.requestMessage' v-text="scope.row.details.requestMessage")
                             span(v-else-if='scope.row.details && scope.row.details.responseMessage' v-text="scope.row.details.responseMessage")
-                    el-table-column(label="Action" width="80" align="right")
+                    el-table-column(label="Action" width="100" align="right")
                         template(v-once #default="scope")
-                            template(v-if="scope.row.senderUserId !== API.currentUser.id")
-                                el-button(v-if="scope.row.type === 'friendRequest'" type="text" icon="el-icon-check" size="mini" @click="acceptNotification(scope.row)")
-                                el-button(v-else-if="scope.row.type === 'invite'" type="text" icon="el-icon-chat-line-square" size="mini" @click="showSendInviteResponseDialog(scope.row)")
+                            template(v-if="scope.row.senderUserId !== API.currentUser.id && !scope.row.$isExpired")
+                                template(v-if="scope.row.type === 'friendRequest'")
+                                    el-tooltip(placement="top" content="Accept" :disabled="hideTooltips")
+                                        el-button(type="text" icon="el-icon-check" size="mini" @click="acceptNotification(scope.row)")
+                                template(v-else-if="scope.row.type === 'invite'")
+                                    el-tooltip(placement="top" content="Decline with message" :disabled="hideTooltips")
+                                        el-button(type="text" icon="el-icon-chat-line-square" size="mini" @click="showSendInviteResponseDialog(scope.row)")
                                 template(v-else-if="scope.row.type === 'requestInvite'")
-                                    el-button(v-if="lastLocation.location && isGameRunning && !checkCanInvite(lastLocation.location)" type="text" icon="el-icon-check" size="mini" @click="acceptRequestInvite(scope.row)")
-                                    el-button(type="text" icon="el-icon-chat-line-square" size="mini" style="margin-left:5px" @click="showSendInviteRequestResponseDialog(scope.row)")
-                                el-button(type="text" icon="el-icon-close" size="mini" style="margin-left:5px" @click="hideNotification(scope.row)")
+                                    template(v-if="lastLocation.location && isGameRunning && !checkCanInvite(lastLocation.location)")
+                                        el-tooltip(placement="top" content="Invite" :disabled="hideTooltips")
+                                            el-button(type="text" icon="el-icon-check" size="mini" @click="acceptRequestInvite(scope.row)")
+                                    el-tooltip(placement="top" content="Decline with message" :disabled="hideTooltips")
+                                        el-button(type="text" icon="el-icon-chat-line-square" size="mini" style="margin-left:5px" @click="showSendInviteRequestResponseDialog(scope.row)")
+                                template(v-if="scope.row.type !== 'requestInviteResponse' && scope.row.type !== 'inviteResponse' && scope.row.type !== 'message'")
+                                    el-tooltip(placement="top" content="Decline" :disabled="hideTooltips")
+                                        el-button(type="text" icon="el-icon-close" size="mini" style="margin-left:5px" @click="hideNotification(scope.row)")
+                            el-tooltip(placement="top" content="Delete log" :disabled="hideTooltips")
+                                el-button(type="text" icon="el-icon-delete" size="mini" style="margin-left:5px" @click="deleteNotificationLog(scope.row)")
 
             //- profile
             .x-container(v-show="$refs.menu && $refs.menu.activeIndex === 'profile'")
diff --git a/html/src/repository/database.js b/html/src/repository/database.js
index 6ed5a500..b145567e 100644
--- a/html/src/repository/database.js
+++ b/html/src/repository/database.js
@@ -21,6 +21,9 @@ class Database {
         await sqliteService.executeNonQuery(
             `CREATE TABLE IF NOT EXISTS ${Database.userId}_friend_log_history (id INTEGER PRIMARY KEY, created_at TEXT, type TEXT, user_id TEXT, display_name TEXT, previous_display_name TEXT, trust_level TEXT, previous_trust_level TEXT)`
         );
+        await sqliteService.executeNonQuery(
+            `CREATE TABLE IF NOT EXISTS ${Database.userId}_notifications (id TEXT PRIMARY KEY, created_at TEXT, type TEXT, sender_user_id TEXT, sender_username TEXT, receiver_user_id TEXT, message TEXT, world_id TEXT, world_name TEXT, image_url TEXT, invite_message TEXT, request_message TEXT, response_message TEXT, expired INTEGER)`
+        );
         await sqliteService.executeNonQuery(
             `CREATE TABLE IF NOT EXISTS memos (user_id TEXT PRIMARY KEY, edited_at TEXT, memo TEXT)`
         );
@@ -523,6 +526,103 @@ class Database {
             }
         );
     }
+
+    async getNotifications() {
+        var notifications = [];
+        await sqliteService.execute((dbRow) => {
+            var row = {
+                id: dbRow[0],
+                created_at: dbRow[1],
+                type: dbRow[2],
+                senderUserId: dbRow[3],
+                senderUsername: dbRow[4],
+                receiverUserId: dbRow[5],
+                message: dbRow[6],
+                details: {
+                    worldId: dbRow[7],
+                    worldName: dbRow[8],
+                    imageUrl: dbRow[9],
+                    inviteMessage: dbRow[10],
+                    requestMessage: dbRow[11],
+                    responseMessage: dbRow[12]
+                }
+            };
+            row.$isExpired = false;
+            if (dbRow[13] === 1) {
+                row.$isExpired = true;
+            }
+            notifications.unshift(row);
+        }, `SELECT * FROM ${Database.userId}_notifications LIMIT 5000`);
+        return notifications;
+    }
+
+    addNotificationToDatabase(row) {
+        var entry = {
+            id: '',
+            created_at: '',
+            type: '',
+            senderUserId: '',
+            senderUsername: '',
+            receiverUserId: '',
+            message: '',
+            ...row,
+            details: {
+                worldId: '',
+                worldName: '',
+                imageUrl: '',
+                inviteMessage: '',
+                requestMessage: '',
+                responseMessage: '',
+                ...row.details
+            }
+        };
+        var expired = 0;
+        if (row.$isExpired) {
+            expired = 1;
+        }
+        sqliteService.executeNonQuery(
+            `INSERT OR IGNORE INTO ${Database.userId}_notifications (id, created_at, type, sender_user_id, sender_username, receiver_user_id, message, world_id, world_name, image_url, invite_message, request_message, response_message, expired) VALUES (@id, @created_at, @type, @sender_user_id, @sender_username, @receiver_user_id, @message, @world_id, @world_name, @image_url, @invite_message, @request_message, @response_message, @expired)`,
+            {
+                '@id': entry.id,
+                '@created_at': entry.created_at,
+                '@type': entry.type,
+                '@sender_user_id': entry.senderUserId,
+                '@sender_username': entry.senderUsername,
+                '@receiver_user_id': entry.receiverUserId,
+                '@message': entry.message,
+                '@world_id': entry.details.worldId,
+                '@world_name': entry.details.worldName,
+                '@image_url': entry.details.imageUrl,
+                '@invite_message': entry.details.inviteMessage,
+                '@request_message': entry.details.requestMessage,
+                '@response_message': entry.details.responseMessage,
+                '@expired': expired
+            }
+        );
+    }
+
+    deleteNotification(rowId) {
+        sqliteService.executeNonQuery(
+            `DELETE FROM ${Database.userId}_notifications WHERE id = @row_id`,
+            {
+                '@row_id': rowId
+            }
+        );
+    }
+
+    updateNotificationExpired(entry) {
+        var expired = 0;
+        if (entry.$isExpired) {
+            expired = 1;
+        }
+        sqliteService.executeNonQuery(
+            `UPDATE ${Database.userId}_notifications SET expired = @expired WHERE id = @id`,
+            {
+                '@id': entry.id,
+                '@expired': expired
+            }
+        );
+    }
 }
 
 var self = new Database();