Kotone-chan, a girl who is usually serious, was worried about her classmates' sexual topics, and one day she went to her physical education teacher's home on a holiday to ask her to teach her about sex. I tried. However, the teacher is a purely lustful teacher who attends a sex club every week, and at first he visited her home to go to her sex service and tried to get rid of her troubles, but she took advantage of her troubles and gradually changed her mind. I play with her body. Kotone-chan also takes what her teacher says seriously, and she gradually becomes dominated by her body and mind.
