"My wife and I have been having sex less recently, since I invited you over." Yuuta 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." Yuuta is frustrated by his insatiable sexual desire. So he secretly visits Yuka and forces himself on her. Yuka cannot resist his uncontrollable sexual prowess...