One day, a new girl joins the company he works at. At first he thought she was a capable rookie, but... noticing all the subtle things she does... he realizes she must be a masochist...! It would seem she's not even aware of it herself... which makes the protagonist frustratedly horny...! And with the two working in close contact, there's no way nothing's gonna happen... When they are alone, she prostrates herself before him and begs... "Let me take responsibility for all the mistakes I made at work." While the protagonist may already be married... her words are too powerful...!! He is unable to repress his sadistic urges any more, and thus begins his sexual training of an utterly masochist woman!