55-year-old Kaoru hasn't had any marital relations with her husband and suffers from deep sexual frustration. In her desperation, she turns her attention to her son as an outlet for her desires. Playfully teasing at first, Kaoru's lust quickly spirals out of control. Eventually, she pins her son down and seduces him with her soaked pussy, forging an exclusive, taboo relationship only between the two of them.