Rima, a student in Tamura's class, a dull math teacher, is getting bad grades and is at risk of repeating a grade. If a student repeats a grade in his class, it will affect Tamura's own evaluation, so for one week during the summer vacation, Tamura has to have one-on-one supplementary lessons with Rima, and Rima, who shows no interest in studying, is a teacher. I'm trying to seduce a certain Tamura with her pussy spread and get credit! Rima, who liked Tamura's cock, goes crazy having sex in an empty school, not because she wants credits...