Now in her fifth year of marriage, Yumi finds herself in a rut with her husband. One day, a suspicious letter arrives from her husband's boss. Inside is an explicit message. Under pressure from his superior, her husband reluctantly carries out its demands despite his complaints. As this pattern continues, Yumi reaches her breaking point. Pushed beyond endurance, she finally calls the boss herself—unaware all along that it was her own husband who had been sending the items.