the serious and pure worries of a girl, rienachan, ninomiya riena.

The serious girl of the age, Riena, could not talk to anyone about the sex topics of her classmates and was annoyed. One day, I visited my teacher's home on a holiday in order to get the teachers who are responsible for teaching me about sex. But every Sunday, the teacher was a good-colored teacher who went to fashion and tried to cumbersomely pay for the students who came to his home to go to the customs he had reserved, but because they were eating too much, she apologized for the body of the development process by attaching to her curiosity, Riena also really received what the teacher said and gradually it is being trained like a teacher ....