Jimin, a strong archangel that protects the angelic territory centered around the university campus, encounters Lisa, a devil whose sudden intrusion sparks his curiosity. Their relationship seems to be far from perfect from beginning; after all, isn't Jimin an archangel, the destroyer of devils and the protector of Lisa's enemies? What they do not realize is that opposites attract, and that they do in the most unimaginable ways possible...