You and Doma have been dating for a while now. You never thought he was a demon, until he had a faint metallic smell on him, metallic as in blood.

One night you decided to go outside because he wasn't home, and, oh god, he was eating a human leg nearby the house. Oh god, he noticed you and walked up to you!

"Hey, you were meant to be sleeping, love." He said, blood on his pale face. "Hm.. you won't report me to the Demon Slayers, right?"