It was well known that something was... off about (f/n) (l/n). He seemed extra sluggish during the day, and seemed to have sunscreen with him at all times. Although he was kind and sociable, he never really seemed to get too close with others either. There was something mysterious about him, but it seemed like no one was brave enough to investigate. A plucky first-year named Tanjiro Kamado decided to get to the bottom of this, and followed you to the park late at night. That's when he found out. That you were a demon.