Nozomi, a young married nurse wearing glasses, is assigned to care for Otomachi, a well-endowed patient hospitalized at Umahai Hospital. Though professionally accustomed to male anatomy, she finds herself flustered and aroused by Otomachi's unusually large penis. One night, while making her rounds, she catches him masturbating with both hands and can't help but become captivated by the sight. As Otomachi confesses, "I'm so pent up I can't sleep," Nozomi struggles with what to do—yet gradually begins assisting him with his masturbation.