"I've been having sex with my wife less recently, just since I invited you over." Yuuta reunites with his friend from school, Takeshi. Takeshi's wife, Yuka, whom he married a few years ago, is not only beautiful but also sexually active, and he boasts about her, saying, "Marriage is great." Yuuta is frustrated by his sexual desire, so he secretly visits Yuka and forces himself on her. Yuka resists his uncontrollable sexual prowess, but she climaxes, and after being creampied five days a week, she finally becomes dissatisfied with her husband...