Kaoru Momota, a young man in high school, intervened when Hime Orihara, a fellow high school student, was being sexually harassed on a train. As a result, they both developed an attraction to each other. However, Hime carried a secret that was too difficult to disclose. She finally confessed, "I'm actually 27 years old." The revelation shocked Kaoru, as he discovered that Hime was actually a woman who was much older than he thought.