Rei had a happy family life, spending her days with her beloved husband, but her only concern was sexual frustration. Due to her husband's erectile dysfunction, their relationship wasn't progressing as she hoped. One day, she noticed her stepson visibly aroused while secretly watching her, and realized that her shy son harbored intense feelings for her. Seeing that he was still a virgin, a desire began to grow within her—to control him, deflower him, and make him her own.