Asakura Ayane is a 35-year-old housewife living with her husband and son. With her husband constantly working overtime, Ayane spends her days waiting alone. During these long nights, she has turned to masturbation for comfort. Despite her husband promising to come home early, another call arrives saying he'll be late again, leaving her disheartened. As usual, she presses a vibrator between her legs to soothe herself. Unbeknownst to her, Kazuya accidentally discovers her in the act, setting their story on an unexpected and intense new course.