The Villainess and the Demon Knight (Manga) Vol. 3

When noblewoman Cecilia realises shes been reincarnated into an otome game, her shock is further complicated by the fact that shes the villainess! Whats worse, she cant seem to change her fate. Now, her engagement is broken off, the heroine is harassing her, and shes forced to work in a brothel - where her very first customer turns out to be the debauched Leader of the Imperial Guard, Lucas Herbst. This dangerous Casanova looks like hell be the end of her, until he takes her as a fiance!