A college student on his job hunt decides to take advantage of his close relationship with his cousin's daughter (his uncle's niece), who is also a university student. They have always been close and engaged in playful sexual activities like kissing games. Desperate for easy money during his job search, he convinces her to make a video together. In their uncle's absence, they meet up at home where they begin by drinking and reminiscing about their past intimate moments. As they become more comfortable, they start discussing erotic topics while touching each other provocatively. He asks if he can watch her masturbate, which leads them to undress further until she agrees to use some unfamiliar toys on him. After reaching climax using these items, she surprises him with a cosplay outfit specifically chosen for its erotic appeal. She then performs oral sex on him before he penetrates her without a condom - both agreeing that this is their first time having raw intercourse. Their passionate encounter continues through various positions including cowgirl, reverse cowgirl, doggy style, missionary, spooning, and side-by-side sitting. Throughout the video, they express how much they enjoy being intimate together and how good it feels to be so close.

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