From the daytime, mother gets aroused watching her second son, Takashi, having sex with an escort, and is caught masturbating by her eldest son, Makoto. Unable to bear the shock and humiliation, she ends up becoming intimately involved with both of her sons, losing herself in passionate affairs. As her bonds with each son deepen, physical desires and emotional conflicts intertwine, causing the mother to gradually confront her own feelings. A complex narrative unfolds, blending familial ties with intense sexual desires.