Bakunyuu Maid Choukyou ~Yakan Kinbaku Kyouiku~

Set in a sprawling penthouse in a city reminiscent of 1960s America, our protagonist is a gentleman by day but a lascivious trainer by night. He specializes in SM training for his busty maids, whose treatment is rough and affection rare—owing to his secret identity as an exorcist. These maids are actually 'demon-possessed,' and the exorcist extracts demonic energy from them during sexual arousal induced by pain or pleasure. The more perverse the SM training, the more efficiently the possession is neutralized. Thus, the protagonist is exactly what these girls need: a savior who subjects them to rigorous, lecherous training to free their bodies and souls.