There is going to be a thirteenth member of E.X.O. he joined a month before debut, with another person, whose name is Baekhyun. They are best friends, and have been through thick and thin ever since they started being trainees. His name is Oh Jihoon, but his stage name is Ace. He has a past that he refuses to bring up, even Baekhyun doesn’t know anything about it, but will he open up to his new family?