羞恥男女が体の違いを全裸になって学習する質の高い授業を実践する共学〇校の保健体育2時限目男性器の仕組み射精のメカニズム編
2nd period of health and physical education at a coeducational school where men and women practice high-quality classes where men and women learn about the differences in their bodies completely naked.Mechanisms of male genitalia and mechanisms of ejaculation.
