After school is also a wonderful time for the beautiful intern Koharu Izumi with the male student she teaches. Since arriving here for her internship, she has been paying attention to one student in the class, not because he is a good student or well-behaved, but because of his strong, masculine, and alluring appearance. Of course, the male student is aware of this, and gradually feelings develop between the two of them. These feelings are not the usual teacher-student relationship, but a type of love akin to that of a romantic couple. Not stopping there, to strengthen their bond, after each class, they would arrange to stay behind to engage in secret love affairs in the lecture hall.