Based on the popular comic from the Doujin circle Antyuumosaku.
The setting is Private Korundo Girls’ Academy, a prestigious, high-society school where tradition is law. To fight declining birth rates, sex is legally mandatory. While the law technically mandates sexual intercourse, the school has completely neglected proper sex education. Enter Kobayashi, a newly appointed “sex instructor.” whose official role is to teach both the theory and practice of intimacy.