Mineta Nanami, having lost her husband, struggles to secure her son Shoji's education expenses using the remaining inheritance and part-time income. Driven by her strong desire to send her son to a prestigious university, she begins considering remarriage after a matchmaking meeting. However, this decision awakens her son's jealousy and unhealthy attachment toward her. Shoji declares, "I'll make things easier for you, Mom. We don't need a new father," and proceeds to violate her body. At that moment, Nanami rediscovers her long-forgotten desires as a woman. Their illicit relationship spirals out of control, pulling her deeper into an incestuous and depraved mother-son affair.