After seeing his wife off on a trip, Kenji felt lonely in the house, which was too big for one person. At that time, his wife's older sister, Minami, suddenly appeared. Kenji was happy to be able to escape the loneliness of being alone, but his joy was short-lived as Minami, who is always touching him violently, pressed her breasts against him with an innocent face. She had soft, large breasts that his wife doesn't have, and her body was soft no matter where he rubbed it. He couldn't allow this. Even though he knew that, his cock swelled up and got excited at the sight of the attractive body in front of him...