Tanaka Nene is a kind and caring busty housewife who helped a diligent and fully erect virgin student in secret from her husband.

The story unfolds as young Manabu studies for exams at his uncle and aunt's apartment, leading to a forbidden tale. He borrows the underwear of the beautiful and kind Tanaka Nene for masturbation, only to be caught in the embarrassing act. Nene's body has grown remarkably, and her areolas are renowned for their allure.