2組のカップルが宅飲みで相互NTR！！彼氏の家でくつろぐサクラちゃん…。しかし、少し重い空気の2人？彼氏の態度に不満気味のサクラちゃんに親友のマリちゃんからの電話。最近付き合い始めたというマリちゃんとユウマカップルが合流し宅飲みに！酔いも回って、サクラちゃんは彼氏のハルトの浮気話を暴露したりで恋愛トークで大盛り上がり！そのうちに寝入ってしまう4人…。寝静まる部屋でハルトがマリちゃんにモーションをかけていく…（実はハルトとマリちゃんはセックスしたこと有り！）ダメだよ…と最初は抵抗していたマリだが、徐々に流されてしまい…洗面所でこっそりハルトとセックスしてしまう！！異変に気付いていたユウマだが…サクラちゃんから「向こう、絶対なんかヤッてるよ…私たちもしちゃおう！」といきなりキス！突然の誘惑！NTRシチュエーションにスケベなユウマもギン勃ち状態！！されるがままにサクラの巧みな腰使いのグラインド騎乗位に完全のノックアウトで逆NTR中出し！まだまだ満足できないサクラが騎乗位セックスを続けていると…マリちゃんとハルトがまさかの合流！！「こっちもしようぜ！」とハルトは再びマリちゃんと相互NTRセックス開始！！！カップル同士の寝取り寝取られNTR4P乱交に発展！！入り混じる嫉妬心と羞恥心！？複雑な感情を推し消す絶え間ない絶頂！！最後も当然、親友の彼氏からの濃厚中出し！！！それでもマリとサクラは親友！中出し仲良し！「どうする？彼氏交換でもするー？www」
Two couples engage in mutual NTR at a home drinking party! Sakura is relaxing at her boyfriend's house… but there's a slightly heavy atmosphere between them? Sakura is unhappy with her boyfriend's behavior when she gets a call from her best friend, Mari. Mari and Yuma, who recently started dating, join them for a home drinking party! As they get drunk, Sakura spills the beans on her boyfriend Haruto's infidelity, and the conversation becomes lively with talk of love! Eventually, all four fall asleep… In the quiet room, Haruto makes a move on Mari… (Actually, Haruto and Mari have had sex before!) Mari initially resists, saying "No…", but she gradually gives in… and ends up having sex with Haruto secretly in the bathroom! Yuma notices something is wrong, but Sakura suddenly kisses him and says, "They're definitely doing something over there… let's do it too!" A sudden seduction! The NTR situation makes even the horny Yuma rock hard! Completely knocked out by Sakura's skillful grinding cowgirl position, he gets a reverse NTR cumshot! Still not satisfied, Sakura continues the cowgirl sex… and then Mari and Haruto unexpectedly join in! "Let's do it too!" Haruto and Mari start mutual NTR sex again! It develops into a NTR 4P orgy with couples cheating on each other! Jealousy and shame are mixed together!? Non-stop orgasms that suppress these complex emotions! And of course, it ends with a deep cumshot from her best friend's boyfriend! Even so, Mari and Sakura are still best friends! Cumming together is fun! "What do you want to do? Shall we swap boyfriends? lol"
– JavGG.net