The series 'Cleavage' plunges into the perverse blackmail of Chizuru, the pristine student council president, by her depraved teacher, Toru Kijimadaira. Armed with compromising photos, Kijimadaira forces Chizuru into a series of sexually degrading acts. It begins with him commanding her to perform fellatio on his throbbing cock in the privacy of his office, her mouth filled with his semen. The humiliation escalates as he fucks her raw in a school elevator, her schoolgirl uniform hiked up around her waist. His twisted desires soon expand to include her fellow student council members, Airi and Sanae. The girls are coerced into debaucherous threesomes and orgies, their bodies used as sexual playthings for the teacher's sick gratification. The episodes detail every lewd act, from deep-throating and creampies to intense group sex scenes where every orifice is violated, showcasing their forced submission and sexual exploitation in graphic, pornographic detail.