My friend's wife is a lewd private tutor

Tetsuro fails his university entrance exam and is currently in his second year of competing. Unable to see this, his father asks Rico, the wife of a colleague who had previously been a private tutor, to become a private tutor. After being happy to understand, Rico immediately teaches Tetsuro how to study. However, Tetsuro, who has no energy and is completely unmotivated, comes up with a strategy to think about how to concentrate on his studies, comes up with one strategy: using Rico's proud body to seduce the students and stimulate the motivation...