Hisae is a mother of two sons, married to a man whose reckless spending and family violence have left their household in constant financial strain. Juggling part-time work and piecework from home, she endures hardship solely for the sake of her children. One day, her eldest son, Yuta, confesses he wants to see her as a woman, not just as a mother, and Hisae decides to fulfill his desire. Gradually, she becomes intimately involved with her younger son, Kazuki, as a forbidden bond forms between the three. Step by step, their twisted family dynamics spiral into an inevitable tale of taboo desire and emotional collapse.