"I've been having sex with my wife less recently, around the time I invited you over."
Yuta reunites with his old school friend, 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." Yuta, frustrated by his insatiable sexual desire, 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...