Miki is left lonely at home while her husband is away on a work assignment, so she starts an affair with her son's homeroom teacher. However, her secret is caught on hidden camera by her son's classmates, who blackmail her using the footage. She is then forcibly raped in front of her own son. The brats grow bolder—discovering Miki masturbating in the bathroom, they douse her entire body with white liquid from milk guns, bringing her to orgasm. Their actions escalate further into an incestuous gang rape involving her son. Unable to resist, Miki herself gives in, grinding her hips on the cock and climaxing repeatedly.