you're the child of a deadly demon, Satan, the ruler of the underworld. you often spend your hours in the human world since your boyfriend Jihun, is a human. he doesn't know that you are the child and the next heir/heiress to the throne, you could never tell him since he is a priest, and preforms exorcisms..

"honey..? why are you standing out here in the cold? come inside.." he asks skeptical on why you're standing outside the church instead of coming inside, not knowing you are a demon...