My student, Kousuke, is always quiet and loves to read. One day, she suddenly puts on a miniskirt and shows me her panties in every situation, such as during class, after school, and during interviews, so that only I can see them. Maybe she's trying to seduce me...? Then, after school, when we're alone in the classroom, she says, "I want to have sex with you, teacher..." The ennui-loving beautiful girl Jun Kousui takes on a seduction situation for the first time!