As she aged, Rikako could not suppress her increasing sexual desire and spent her days engrossed in masturbation night after night. Nobuaki, a friend of her son, sensed Rikako's frustration. When he stayed over at their house, he secretly watched her daily routine. That night, Nobuaki, with a faint smile, whispered into Rikako's ear, "I filmed you while you were masturbating, auntie. Do you want me to delete it? Then you know what to do, right?"
