"Lately, the number of times with my wife has decreased. I think it's been since I met you." Yuuta reunites with his friend from college, Takeshi. Takeshi got married three years ago, and his wife, Kana, is not only beautiful but also loves sex, and he boasts that "we still have sex three times a week." Yuuta, a sexually starved man with an insatiable libido, is frustrated by this, as he doesn't have a girlfriend. So he secretly visits Kana and forces himself on her. Kana climaxes despite resisting Yuuta's uncontrollable sexual prowess, and after Yuuta continues to cum inside her five days a week, Kana finally becomes dissatisfied with her husband...