Mystic Messenger is an otome game with puzzle elements. You stumbled upon an app called "Mystic Messenger" and downloaded it. Once you opened it up the app is connected to a mystic group chat with attractive guys. You are asked to join their secret party planning association called and the story begins...
Mystic Messenger 神祕信使
神秘信使 (Mystic Messenger) 繁中版
will be installed on your device.