Driven by a sexless marriage, 36-year-old Sayuri agrees to spend a night at an adult college student's home with just one condom. They quickly use it for their first round, but when one ejaculation is not enough for him, she consents to sex without protection. They pretend the second round never happened, yet neither can forget the pleasure of raw sex. With her departure time approaching, they give in to their desire for each other once more.