diff --git a/Server/lib/Web/lib/kkutu/body.js b/Server/lib/Web/lib/kkutu/body.js
index 6728cfe8c..5afa4369f 100644
--- a/Server/lib/Web/lib/kkutu/body.js
+++ b/Server/lib/Web/lib/kkutu/body.js
@@ -460,6 +460,7 @@ function onMessage(data){
 				location.href = "/login?desc=login_kkutu"; */
 			}else if(data.code == 403){
 				loading();
+				playBGM('lobby');
 			}else if(data.code == 406){
 				if($stage.dialog.quick.is(':visible')){
 					$data._preQuick = false;