"My sister is scary, so please don't make any noise at home." On the way to his friend Koji's house, Kenji heard this story and couldn't imagine what kind of person Koji's sister was. And when Kenji arrived at Koji's house, he met Koji's sister, Chiori, for the first time. Her adult sex appeal...her smile seemed to envelop you all...and her lewd body was revealed in her loungewear. Kenji couldn't hide his excitement. Chiori invited Kenji to come over anytime, but...