Hakoiri Shoujo: Virgin Territory

The main character is a young and attractive man who works as a teacher at a women's academy for girls from wealthy families. There are no boys in this academy, so he has become very popular among the female students.

Sometimes he conducts additional classes where he teaches girls the basics of relationships, demonstrating everything by example. At one of these classes, he gets close to one of the students. However, the appearance of a beautiful new student immediately attracts his attention.