Since her husband's death, Maiko had managed to survive on insurance money and part-time work, but even that was reaching its limit. This was because her son, Sho, had become depressed about his job search and had withdrawn into himself. Determined, Maiko knocked on the door of a sex establishment catering to older women, and her earnestness impressed the staff, leading to her hiring. Three months passed. Work was going well... she even gained some regular clients, but one day, one of her clients, Saeki...