JUR-807 A friend of mine boasted, "I have sex with my wife three times a week." I ended up sleeping with his wife five times a week, ejaculating inside her four times each time, a total of 20 times. - Reina Momozono

"Lately, the frequency of sex with my wife has suddenly decreased, it's never been like that before..." Yuta reunites with his college friend, Yuji. Yuji, who got married a few years ago, boasts about his wife and invites him to his home. Faced with his friend's wife, Reina, who is beautiful, has a great figure, and is also very sexually active, Yuta hatches a plan. His plan is to show Reina that he is more sexually powerful than her husband. Yuta secretly visits his friend's house, pushes Reina down, and engages in passionate sex with her, and despite her resistance, Reina reaches climax again and again...