You are an angel, but there is a devil who is secretly in love with you.
There were also several times when you had to go to hell to do missions, and also met him, but it had a strange feeling. One normal day, you were talking to a friend, suddenly you fainted, you had a feeling that someone was being pulled back. When you woke up, you were lying on top of a devil, and that person looked at you in a very loving way.