After retiring from club activities, Nana (18), a girl in the athletic club, switched from going to school by bicycle to going to school by train. On an unfamiliar crowded train, I notice something touching my butt. It was the first time that I met Slut. In my life, which was far from sexuality, I can't forget the pleasure given to Slut ● ... Nana becomes more and more absorbed in dangerous play.
