Wataru has failed the university entrance exam three times. Unable to bear the situation any longer, his father asks his friend's wife, Reiko, who used to be a private tutor, to be his private tutor. Reiko readily agrees and immediately starts teaching Wataru. His eyes glimpse Reiko's cleavage from between her shirt, her breasts pressing against his arm as she gets engrossed in her studies, and a glimpse of her panties between her thighs. This makes it even harder for Wataru to concentrate on his studies, so he turns to Reiko...