Riena, a serious girl of her age, was worried that she couldn't keep up with the sexual topics of her classmates and couldn't talk to anyone. One day, I took the plunge and visited the teacher's home on a holiday to ask my homeroom teacher to teach me about sex. However, the teacher is a genuine amorous teacher who goes to the customs every Sunday, and he was trying to get rid of the trouble of the student who came to his home to go to the customs he had reserved, but he was too persistent, so he took advantage of her curiosity and played with the body in the development process, and Riena also took what the teacher said and gradually trained her body as the teacher's good.