While her husband is away on a work assignment, Yui has been secretly having an affair with her son's homeroom teacher to cope with nightly loneliness. The illicit affair is caught on camera by a group of delinquent boys who blackmail her, forcing her to have creampie sex in front of her own son. The boys then sneak into her home and torment her with milk squirts while she's masturbating, bringing her to multiple orgasms. Emboldened, they recruit her son into their twisted game, leading to forbidden incest. The three of them take turns in a relentless gangbang, repeatedly creampie-fucking Yui. Her entire body becomes sensitive to cock, climaxing over and over as she screams, "More! Give me more!!"