Her husband's sexual stamina has been declining for several years now, leaving Ayane deeply frustrated and emotionally drained from an unsatisfying marital life. She's so desperate for release that she feels like screaming, "I need a cock inside me right now!" When her son's erect penis appears before her, she knows it's wrong—but the long-missed sensation of a real manhood tempts her beyond control. Once again, the words she utters as she sends her husband off—"Have a good day, dear..."—become the forbidden signal for mother and son to indulge in secret, creampie-filled incest.