It was a certain Friday―. The story begins when Yumi, the wife of a man named Abe's boss, comes to send her drunk husband home. Both the husband and Yumi are too busy with work to have any opportunity for nighttime activities except on Fridays... Unknowingly, Yumi has been building up her desires. A few weeks later, when Abe comes again to send her drunk husband home, he notices Yumi's sexual frustration. From that day forward, the two of them start meeting on "Fridays" only to satisfy each other's bodily needs…
