Natsume has been married for two years and is living a happy life with her husband Ginji, who is kind, hardworking, and a huge butt lover. One night, Ginji comes home with his younger brother, Shinji. He seems to be looking for work, so they decide to live together until he finds a job. Shinji, who is just as big a butt lover as his brother, can't help but be curious about Natsume's butt. The best peach butt he's ever had in his life is within reach! Just thinking about it fills his mind with thoughts of Natsume's butt...