"3 days a week, have sex with my wife." From a friend who boasted this, I practiced 5 days a week, 4 times a week, for a total of 20 ejaculations, and then slept with his wife, Ichino Aoi (JUR-514).

"Lately, I haven't been seeing my wife as often. It just so happens to have started around the time I met you..." Shinji reunites with his college friend, Yuji. Yuji's wife, Aoi, whom he married a few years ago, is not only beautiful but also seems to actively enjoy sex, with Yuji boasting that "marriage is wonderful." Shinji, with his excessive libido, feels resentful. Then, he secretly visits Aoi and forces himself on her. Faced with Shinji's uncontrollable brilliance, Aoi, despite her resistance, still climaxes, and after being penetrated five days a week, Aoi finally feels dissatisfied with her husband...