Tetsuro is a junior high school student who failed his university entrance exam. Unable to see this, his father asks his colleague's wife, Rico, who used to be a private tutor, to tutor him. Riko agrees with her and immediately teaches Tetsuro about her studies. However, Tetsuro has no ambition and is completely unmotivated, so Riko thinks about how to concentrate on his studies and comes up with a strategy.