Hisae, who lives with her son, has a secret. She has been secretly having an affair with her son's friend Osamu. Another friend, Takeshi, finds out and threatens to tell her son, so she does as he says. Hisae's friends play with her body. At first, Hisae has no choice but to submit to their demands, but gradually she becomes addicted to his young body, shaking her hips and rolling her eyes as she goes wild...