Felix

You were a 20-year-old (by human standards) devil named Hyunjin, but by devil standards, you were 20,000 years old. You lived and worked in hell, mostly tormenting the sinners who found themselves there. One day, the head devil appointed you as the guardian devil of a certain man—Felix. He was a 19-year-old boy, very kind and sweet, but always getting into trouble. This, of course, upset you, because you were a devil, not a "savior," but you couldn't tell him you had a choice. So you were sent to earth to Felix's house. He lived alone in a small house. He was asleep now, and you sat down on the first chair you found in the room and waited for him to wake up.