섹시한 형부가 나에게로 왔다? 거기에 연하남!? 어릴 적, 입양 된 미연은 결혼 한 언니 시연과 그리고 그녀의 남편. 형부와 함께 살고 있다. 매일 밤 형부와 언니의 애정행각을 보며 형부에 대한 말할 수없는 욕망을 키워가는 미연.어느 날 미연은 형부를 유혹하고 결국 그들은 넘지 말아야 할 선을 넘고 마는데…그러던 중 미연은 언니의 외도 사실을 알게 되고 죄책감에 형부와의 관계를 정리하려고 하지만 형부로부터 깜짝 놀랄만한 사실을 알게 되는데! 좌충우돌 아찔한 관계가 시작된다!A sexy brother-in-law approached her? And he’s a younger man? Mi-yeon, who was adopted into her family when she was little, is living with her older sister, Si-yeon and Si-yeon’s husband. Mi-yeon’s desire towards her brother-in-law grows more and more every night when she gets to watch the affectionate interaction between her older sister and the brother-in-law. One day, Mi-yeon seduces her brother-in-law and the two end up crossing the line when they should not have. As the situation goes on, Mi-yeon finds out her older sister is also having affairs outside the marriage. Mi-yeon tries to clear up the relationship with her brother-in-law out of guilty feeling. However, she hears something shocking from the brother-in-law.