『最近、急に妻との回数が減ったんだ、 今までそんなことなかったのにさ…。』大学時代の友人、雄二と再会したゆうた。数年前に結婚した雄二に嫁自慢をされて自宅へ招かれたのだが、美人でスタイルも抜群、おまけに性欲旺盛な友人の妻・怜奈を前にして、ゆうたはある企みを持つ。それは、怜奈に夫よりも性豪であることを分からせるというもの。密かに友人宅を訪ねたゆうたは怜奈を押し倒し絶倫性交におよび、怜奈は抵抗しながらも何度も何度も絶頂してしまい…。

"Lately, the frequency of sex with my wife has suddenly decreased. It's never been like this before…" Yuta reunites with his college friend, Yuji. Yuji, who got married a few years ago, boasts about his wife and invites Yuta 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. Despite her resistance, Reina reaches climax again and again…