A man named Mr. Tanaka runs a cram school called 'Some Rural Town Cram School'. In addition to teaching subjects like Japanese and math, he also teaches health education at the request of parents. He hopes that by educating his students about proper sexual knowledge, they will grow up healthily. He actively participates in events organized by the local community association, such as clean-ups, potlucks, and waste collection drives. This has earned him the trust of the neighborhood. One day, a female student visits his class asking if she could see his penis. Initially surprised but sensing her sincerity, he agrees to show her. As time passes, the girl becomes more explicit with her requests, wanting to measure his erect size, witness his ejaculation, and even practice making babies. Despite initially refusing these demands due to fear of getting caught by her parents or neighbors, she threatens to expose his exposed genitals unless he complies. Ultimately, he gives in and ends up having sex with her while pretending to be innocent. However, it turns out that she was an incredibly promiscuous girl. Now, he worries about how this situation might affect his reputation among parents and neighbors.