She wasn't actually expecting the ritual to work but it did and now Chaeyoung is stuck with a demon named Tzuyu who can't go back to the demon realm until she fulfills Chaeyoung's deepest desire. The only problem is, is that Chaeyoung isn't sure as to what that desire is. Will Chaeyoung be able to send her back home or will she be stuck with this demon forever? Who knows.