A world where "practical sex education" exists, which was introduced as a measure to combat the declining birthrate. It is a new type of sex education where men and women learn about sex by actually having sex to make a baby and getting pregnant. In this work, homeroom teacher Otsuki Hibiki calls in students who have refused to come to school and uses her own body to directly teach them about creampie sex... She carefully teaches them which parts of a woman's body are sensitive and how to please them, and lets them experience making a baby by actually touching them, inserting themselves, and creampieing them, and then she reports that she is pregnant, and the education ends.