A father finds out that his junior colleague's wife, Aoi, is a private tutor, and decides to have her help his stupid son, who is completely unable to study. He trusts Aoi because of her earnest, polite and humble personality, but Aoi true nature is that of a slutty wife who is hungry for young men's dicks... Aoi takes this opportunity to release the sexual desires that have been building up every day, slowly teasing his crotch, and the stupid son's virgin dick is helpless...