Hitomi Katase, neglected by her husband due to his busy work schedule, gradually forgets the intimacy of married life. Unable to suppress her growing desire, her passion turns toward her beloved son, leading them into a forbidden relationship. Captivated by her son's youthful, powerful body and his vigorous rhythm, Hitomi repeatedly indulges in taboo sex whenever her husband leaves the house. The son, awakened by the pleasure he receives from Hitomi, eagerly looks forward to their secret encounters whenever his father is away. As a result, the husband's absences become the catalyst for their increasingly intense and intimate bond.