A college student looking for an easy way to make money during his job hunt, decides to film a video with his 18-year-old cousin (his aunt's daughter) who he's always been close to. They've always had a playful, intimate relationship, often engaging in sensual activities like mutual masturbation. Taking advantage of his aunt's absence, he sets up a secret rendezvous at her house, where they engage in forbidden sex that they must keep hidden. The video captures their intimate moments from start to finish, including: meeting up, shopping together, going home, having drinks, cuddling, engaging in flirty conversation, watching each other masturbate, removing her black stockings, introducing her to toys, experiencing intense clitoral stimulation, playing with her beautiful pink nipples, giving her a blowjob, dressing her up in sexy cosplay, performing oral sex, having unprotected sex (her first time), moaning in pleasure from the raw penetration, riding position, grinding against each other for intense climaxes, various positions like doggy style, cowgirl, reverse cowgirl, face-to-face, and sofa stand-up, ending with a generous creampie.

就活中の大学生が従姉妹の女子大生(叔母の娘18歳)に手を出す一部始終が流出！昔から2人は仲が良く、舐めあいっこ等のエッチな遊びをしていた関係性。就活に疲れた男子大学生が楽に稼げる方法を模索中に【えり】なら協力してくれると思い動画を回す。叔母さんの留守中の家…絶対にバレてはいけない、禁断のSEXをご覧ください！【本編】待ち合わせ→買い物をして家へ→宅飲み→雑談しつつイチャイチャ→エロ系の雑談を織り交ぜる→オナニーしてるところを見たいとお願い→黒ストを脱がす→オモチャを取り出して使ったことないというので使わせる→足ピン絶頂→乳首を弄ってあげる(綺麗なピンク色)→乳首舐め→エロコスプレを用意していたので着替えてもらう→フェラ→ゴムなしで挿入→ナマでするのは今日が初めて→生挿入が気持ち良すぎて顔を歪ませる→騎乗位→自らグラインドして絶頂→正常位→バック→寝バック→側位→対面座位→正常位→ソファで立ちバック→正常位→たっぷりと中出し