As the years passed, Rikako could not suppress her increasing sex drive and spent each night engrossed in masturbation. Her friend's son Shinmei caught wind of Rikako's frustration. When he stayed over at her house one night, he secretly watched her daily routine. That night, with a smirk, Shinmei whispered in Rikako's ear, 'I happened to record you masturbating. Want me to delete it? Well, you know what you have to do, right?'
