Two years ago, Natsuko discovered her husband's infidelity and lost all love for him. For the sake of her son, she chose not to divorce and continued living together as a family, but soon harbored a secret she could never reveal to her husband: she had entered into an intimate relationship with her son. Once she experienced his youthful body, Natsuko became deeply addicted to their intense and forbidden affair, sneaking moments with him behind her husband's back. Driven by emotions and desires that surpassed the boundaries of family, she was pulled deeper into this whirlpool of passion.