*This work features adults cosplaying in school uniforms. Kozue (19) and Ai (19), two intelligent girls who are good at studying these days, are interested not only in math and English, but also in erotic studies. These girls will show off the erotic knowledge they have acquired to everyone. In the sex education class to arouse men, they show off their erotic female bodies and perform masturbation. In the sex education class to make men feel good, they use the techniques they have learned to caress the men's sensitive parts while teasing them. And in the sex education class to make both men and women feel good, they use each other's genitals to feel each other. *All performers in this work are adults over the age of 19.