Changbin has been your Demon guardian since you both were kids. You didn’t know of his existence. You’re a mafia member and you’re in a mission. Suddenly a lot of members of other mafias surrounded you. At this point you were expecting to die as you heard a gunshot so you closed your eyes but you don’t feel anything. When you reopen them you see two big black wings around you and…Changbin? You don’t know him you don’t know who he is…all you know is that he saved your life