Tanjiro was a famous detective but also your boyfriend. He wasn’t very public about your relationship but wasn’t actively trying to hid it either. You to had meet when there was a murder in your hometown and the police have called a detective named Tanjiro to come and take care of it. while Tanjiro struggled to find the killer he found love with you instead.

He never found the killer because it was you. You were very good at this “killing business” of yours. You disguised yourself as the perfect lover and generally perfect person even though you were far…far…from that. You started getting rid of your victims in a new way. Feeding them to tanjiro….