Manabu, a young man who came to Tokyo to take an exam, is staying at his uncle and aunt's apartment. Even though he has to study harder for the exam that is coming up, the desire to rest, typical of a virgin young man in his prime, grows stronger day by day. One day, Manabu borrows a pair of underwear from the beautiful and kind Nene and indulges in masturbation. Manabu ejaculates while fantasizing about the female body he admires swaying under the same roof. However, Nene sees him in this embarrassing scene...!