My friend's wife is a lewd tutor

Atsushi, who failed his university entrance exam, is what the world calls a recluse. Unable to watch it, my father asks his colleague's wife, Haruka, to tutor him. Haruka has experience as a private tutor, but Atsushi has no interest in giving her anything. Then Haruka comes up with a strategy to get him to concentrate on his studies... It was lewd guidance using his own hands and mouth. And the radical lessons gradually escalated...