diff --git a/src/App.vue b/src/App.vue
index 385415e..9be35ad 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -35,6 +35,14 @@ export default defineComponent({
         localStorage.removeItem("refresh_token");
       });
     }
+    window.addEventListener("online", function (e) {
+      e.preventDefault();
+    });
+  },
+  beforeUnmount() {
+    window.removeEventListener("online", function (e) {
+      e.preventDefault();
+    });
   },
 });
 </script>
diff --git a/src/components/admin/operation/mission/DetailFormEditor.vue b/src/components/admin/operation/mission/DetailFormEditor.vue
index 3d63b3b..1f13433 100644
--- a/src/components/admin/operation/mission/DetailFormEditor.vue
+++ b/src/components/admin/operation/mission/DetailFormEditor.vue
@@ -2,7 +2,14 @@
   <div class="flex flex-col">
     <div class="flex flex-row gap-2 items-center">
       <label :for="title">{{ title }}</label>
-      <lottie-player src="/typing_animation.json" class="w-fit h-5" loop autoplay />
+      <lottie-player
+        v-if="currentEditors.length != 0"
+        src="/typing_animation.json"
+        class="w-fit h-5"
+        loop
+        autoplay
+        v-tippy="currentEditors.map((c) => c.username).join(', ')"
+      />
     </div>
     <QuillEditor
       :id="title"
@@ -11,6 +18,8 @@
       contentType="html"
       :options="{ modules: moduleOptions }"
       @ready="initEditor"
+      @selectionChange="selectionChange"
+      @blur="blured"
     />
     <!--
         :enable="can('create', 'operation', 'mission')"
@@ -28,7 +37,7 @@ import { QuillBinding } from "y-quill";
 import { moduleOptions } from "@/helpers/quillConfig";
 import * as Y from "yjs";
 import "@lottiefiles/lottie-player";
-import { Awareness } from "@/helpers/awareness";
+import { Awareness, type AwarenessActions, type EditorRange, type EditorState } from "@/helpers/awareness";
 </script>
 
 <script lang="ts">
@@ -39,7 +48,7 @@ export default defineComponent({
       required: true,
     },
     awareness: {
-      type: Object as PropType<Partial<Awareness>>,
+      type: Object as PropType<Awareness>,
       required: true,
     },
     title: {
@@ -53,18 +62,64 @@ export default defineComponent({
       cursors: undefined as undefined | QuillCursors,
     };
   },
+  computed: {
+    currentEditors() {
+      return this.awareness.getEditorObjsByField(this.title);
+    },
+  },
+  mounted() {
+    this.awareness.emitter.on("change", this.handleChange);
+    this.awareness.emitter.on("clear", this.clear);
+  },
   beforeUnmount() {
     if (this.binding) {
       this.binding.destroy();
       this.binding = undefined;
     }
+    this.awareness.emitter.off("change", this.handleChange);
+    this.awareness.emitter.off("clear", this.clear);
   },
   methods: {
     initEditor(quill: Quill) {
       quill.history.clear();
-      this.binding = new QuillBinding(this.text, quill); // TODO: awareness
+      this.binding = new QuillBinding(this.text, quill);
       this.cursors = quill.getModule("cursors") as QuillCursors;
     },
+    selectionChange({ range, oldRange, source }: { range: EditorRange; oldRange: any; source: string }) {
+      if (range != null) {
+        this.awareness.publishMyState({
+          field: this.title,
+          range: range,
+        });
+      }
+    },
+    blured() {
+      this.awareness.publishMyState({
+        field: "blured user",
+      });
+    },
+    handleChange(
+      d: {
+        socketId: string;
+        action: AwarenessActions;
+      } & EditorState
+    ) {
+      if (d.action == "remove") {
+        this.cursors?.removeCursor(d.socketId);
+      }
+      if (d.field == this.title) {
+        let user = this.awareness.getEditor(d.socketId);
+        if (!user || !d.range) return;
+        this.cursors?.createCursor(d.socketId, user.username, user.color);
+        this.cursors?.moveCursor(d.socketId, d.range);
+        this.cursors?.toggleFlag(d.socketId, true);
+      } else if (d.field == "blured user") {
+        this.cursors?.removeCursor(d.socketId);
+      }
+    },
+    clear() {
+      this.cursors?.clearCursors();
+    },
   },
 });
 </script>
diff --git a/src/components/admin/operation/mission/DetailFormInput.vue b/src/components/admin/operation/mission/DetailFormInput.vue
index 3e4c5ea..6a394b3 100644
--- a/src/components/admin/operation/mission/DetailFormInput.vue
+++ b/src/components/admin/operation/mission/DetailFormInput.vue
@@ -75,15 +75,11 @@ export default defineComponent({
     focused() {
       this.awareness.publishMyState({
         field: this.title,
-        cursor: undefined,
-        range: undefined,
       });
     },
     blured() {
       this.awareness.publishMyState({
         field: "blured user",
-        cursor: undefined,
-        range: undefined,
       });
     },
   },
diff --git a/src/helpers/awareness.ts b/src/helpers/awareness.ts
index bde5539..165f2c3 100644
--- a/src/helpers/awareness.ts
+++ b/src/helpers/awareness.ts
@@ -9,8 +9,12 @@ export interface Editor {
 
 export interface EditorState {
   field: string;
-  cursor: any;
-  range: any;
+  cursor?: number;
+  range?: EditorRange;
+}
+export interface EditorRange {
+  index: number;
+  length: number;
 }
 
 export type AwarenessActions = "update" | "remove";
@@ -18,6 +22,7 @@ export type AwarenessActions = "update" | "remove";
 export type AwarenessEvents = {
   update: { data: EditorState };
   change: { socketId: string; action: AwarenessActions } & EditorState;
+  clear: void;
 };
 
 export class Awareness {
@@ -73,6 +78,7 @@ export class Awareness {
   public reset() {
     this.editors.clear();
     this.editorStates.clear();
+    this.emitter.emit("clear");
   }
 
   public destroy() {
diff --git a/src/main.css b/src/main.css
index 156052a..0830770 100644
--- a/src/main.css
+++ b/src/main.css
@@ -149,3 +149,7 @@ summary::-webkit-details-marker {
     @apply !order-1;
   }
 }
+
+.ql-cursor-caret-container {
+  z-index: 1 !important;
+}