Having failed the college entrance exam three times, Watari's father finally arranges for Reiko, the wife of an old friend who once worked as a private tutor, to help him study. Reiko kindly accepts and begins giving Watari careful, thorough lessons. As their sessions continue, Watari finds himself distracted—glimpsing the alluring cleavage peeking through Reiko's shirt, feeling the soft press of her breasts against his arm as she leans in during intense study moments, and catching subtle flashes of her panties between her thighs. Overwhelmed by desire and unable to focus on academics, Watari finally gives in and makes a move on Reiko...