Yamaguchi Hisae, 54 years old. Though she has been married for 30 years and shares a long-standing marital life, she confesses that she still feels unfulfilled, saying, "I want just a little more... even more..." While she and her husband make love about twice a month, it's clearly not enough for her. By day, she works at a school lunch center, where she spends her time stirring large pots of food and carrying heavy cookware—an unexpectedly physical job. To relieve the daily fatigue and pent-up desires, she secretly indulges in masturbation almost every day. Tonight, all that suppressed energy will finally be unleashed to the fullest!