Ever since rescuing Charlotte Evans, a fugitive noble who fled her kingdom after being accused by her royal former fiancé of crimes she didn't commit, deviant sorcerer Allen Crawford has taken it upon himself to make up for all the hardships his new housemate had been forced to endure. His brilliant plan: give her a crash course in all the naughty pleasures this world has to offer. But just as Charlotte had begun to warm up to this unconventional education and settle into her new life as Allen's live-in maid, a new arrival raises the stakes with an unexpected challenge and uncovers some scars that might prove too much for even the fearsome Demon Lord to handle.