diff --git a/EpinelPS/LobbyServer/Msgs/Event/CheckBookmarkScenarioExists.cs b/EpinelPS/LobbyServer/Msgs/Event/CheckBookmarkScenarioExists.cs
new file mode 100644
index 0000000..2530b96
--- /dev/null
+++ b/EpinelPS/LobbyServer/Msgs/Event/CheckBookmarkScenarioExists.cs
@@ -0,0 +1,19 @@
+using EpinelPS.Utils;
+
+namespace EpinelPS.LobbyServer.Msgs.Event
+{
+    [PacketPath("/bookmark/event/scenario/exist")]
+    public class CheckBookmarkScenarioExists : LobbyMsgHandler
+    {
+        protected override async Task HandleAsync()
+        {
+            var req = await ReadData<ReqExistScenarioBookmark>();
+
+            var response = new ResExistScenarioBookmark();
+
+         // TODO
+  
+            await WriteDataAsync(response);
+        }
+    }
+}
diff --git a/EpinelPS/LobbyServer/Msgs/Event/CheckScenarioExists.cs b/EpinelPS/LobbyServer/Msgs/Event/CheckScenarioExists.cs
new file mode 100644
index 0000000..83a1460
--- /dev/null
+++ b/EpinelPS/LobbyServer/Msgs/Event/CheckScenarioExists.cs
@@ -0,0 +1,21 @@
+using EpinelPS.Utils;
+
+namespace EpinelPS.LobbyServer.Msgs.Event
+{
+    [PacketPath("/event/scenario/exist")]
+    public class CheckScenarioExists : LobbyMsgHandler
+    {
+        protected override async Task HandleAsync()
+        {
+            var req = await ReadData<ReqExistEventScenario>();
+
+            var response = new ResExistEventScenario();
+
+            foreach (var item in req.ScenarioGroupIds)
+            response.ExistGroupIds.Add(item);
+
+  
+            await WriteDataAsync(response);
+        }
+    }
+}