The story of a certain family. The catalyst was the elder brother Tatsuo's long-term overseas business trip. Because, despite being supposed to have left as an adopted son-in-law, the younger brother Yasuhiro crossed the line with his sister-in-law Ryoko Murakami shortly after moving in together. As a result, Ryoko became the younger brother's sex slave. Meanwhile, the younger brother's wife Neha Leon, relatively deprived of nighttime companionship, continued to seduce her brother-in-law with her unguarded and hedonistic behavior upon his return, ultimately leading to an affair. Then one day, the brothers simultaneously came up with a peculiar proposal. Let's see which one of our wives is more perverted…
