A serious girl of her age, Riena, was in trouble because she couldn't keep up with her classmates' sexual topics and couldn't talk to anyone. One day, I went to the teacher's house on a day off to be taught about sex by my homeroom teacher. However, the teacher is a genuine porn teacher who comes to customs every Sunday, and is trying to get rid of the troublesome students who visit his home to go to the customs he has booked, but he is so stubborn that he takes advantage of her curiosity and plays with her body in the process of development.
