Natsuki regrets having given in to a momentary lapse in judgment by engaging in a physical relationship with her son and decides it must end. However, her teenage son, far from stopping, grows increasingly obsessed with sex. Craving even greater pleasure, he hungrily demands more and more from Natsuki. Helpless against his relentless desire, Natsuki finds herself sinking deeper into creampie-filled nights with her own son. Again today, the moment her husband leaves the house, the two embrace passionately, exchanging heated kisses as another night of forbidden intimacy begins.