Tatsumaki-ppoi Tsuma

A newlywed couple moves into a house where the husband's older brother also lives. The wife, who bears a striking resemblance to Tatsumaki, discovers the brother secretly masturbating to her and her belongings. She confronts him, leading to a complex dynamic. The wife continues to be obsessed with her brother-in-law's semen, tasting it from her underwear. She masturbates with a toy while thinking about him. Later, while doing chores, she intentionally exposes herself to him, leading to him licking her genitals. They then have sex in a hotel, hiding their affair from her husband. The wife continues her secret affair with her brother-in-law. They have sex in various locations, including a public park restroom, the bathroom at home, and a hotel, often while the husband is nearby or away on business. She also dresses up in cosplay. The wife continues her affair with her brother-in-law, having sex in a public restroom, a hotel, and while camping. Later, a black man named Bob stays with them, and she begins an affair with him as well, performing oral sex and having sex with him while her husband is unaware. They also go on a hot spring trip together.