Beautiful mature woman Toshie Yabe finally releases her fist fuck! Hisae is a female teacher at a certain school. One day, while teaching about the functions of male and female genitalia during a health class, two students are not listening to what she is saying at all! When she confronts them, they say that they have problems in their home environment and have no interest in the human body. Furthermore, the two students accuse Hisae, saying, "There's no way a baby can come out of a woman's genitalia." For the sake of these two, Hisae makes a decision...