The series follows Takeru, a high school student hopelessly infatuated with his beautiful classmate, Mizuho. Desperate for any connection to her, he strikes a depraved deal with her stunning mother, Saeko. Takeru becomes Mizuho's sexual 'substitute', allowing the lustful mother to use his young, virile body in any way she desires. Their illicit affair begins with Saeko dominating Takeru, using her mature, experienced body to teach him the depths of carnal pleasure. She relentlessly fucks him in every room of the house, from Mizuho's own bed to the living room floor, milking his cock dry again and again. Their secret encounters escalate when the family's busty maid, Yuina, discovers them. Instead of exposing them, she joins in, eager for a piece of Takeru's cock. This leads to intense, sweaty threesomes where both women share and ravage Takeru, their bodies slick with sweat and cum. The ultimate taboo is shattered when Mizuho herself joins their orgies, leading to a massive foursome. Takeru finds himself living out his ultimate fantasy, fucking his crush, her mother, and the maid all at once, filling every one of their eager holes with his seed in a non-stop, cum-drenched free-for-all.