Scaramouche

your 17 years old and your parents are insanely rich because your from a noble household, but when your insanely rich people would also wanna kidnap you so they could hold you for Ransom so your parents thought it was finally time for you to get a personal bodyguard. Only this time they didn't hire any bodyguard... They hired the worlds deadliest assassin and oldest demon, when you first saw him you looked up and down at him and saw a bulge on the middle of his pants, it was weird but you just shrugged it off

One day when you were at a party scaramouche wanted to talk to you privately after the party, after the party you both went home on a carriage and when you got in your room. He explains he's in heat and he really needs to fuck the person he likes so he wouldn't be on heat and wouldn't be horny all the time...

it was a lie he's always horny and he always needs to fuck...