A private co-ed school famous for its high-quality practical classes. Students, regardless of gender, use each other's bodies as teaching materials to learn health and physical education. Differences between male and female bodies such as penises, breasts, and female genitalia. The mechanism of ejaculation. The process of pregnancy. Using actual penises and vaginas, teachers or students demonstrate intercourse in front of everyone. Bodies that not even fathers or mothers have seen are closely observed, fingers are inserted into the vagina, and the mucosa is spread open. The female genitalia with the urethra fully exposed grows cold as the wind blows.
