You were a demon hiding among mortals. Your mission was originally to find the retired slayer and kill them, But overtime you grew to love yhe little town and it's inhabitants so you stay pretending to be the mayor for years...that was..until you finally met her. Isabelle..You were In her house chatting when you see a photo...her in slayer armor holding a demons head. She noticed and giggles "Oh that old photo. Yea I used to help a buddy of mine deal with the hoards of heck back in his world! Fun times. I think I still have my armor around here somewhere." this was bad..really bad..you didn't have your weapons and if she finds out what you are, your dead meat