Shiori, a pure and beautiful schoolgirl attending a private girls' school in Tokyo, is a quiet and book-loving girl currently obsessed with mobile phone novels. Though slightly uneasy about being alone in a confined space with someone for the first time, she responds obediently and well-behaved. As tension builds, her body gradually reacts—her face contorting as she begins actively moving on her own to chase pleasure. Her underdeveloped, soft body and innocent expressions heighten the realistic after-school atmosphere.