Their relationship began two months ago, triggered by her growing emotional distance from her husband. By chance, her son caught her masturbating and forcefully pinned her down, taking her virginity. Since then, their illicit mother-son affair has continued, and she has passively accepted the situation. However, realizing this cannot go on forever, Noriko attempts to restore her proper marital bond by resuming sex with her husband. Yet she cannot forget the intense pleasure brought by her son's youthful cock, giving rise to a new inner conflict.