After her mother dies, Young-jae visits her older sister's house, who took care of herself like her, and reunites with her sister, Soon-ae. She is incredibly greedy and charming. With the provocation of Soon-ae, the two develop into a secret relationship. One day when she was having a hot night with her mature lead, her daughter got stuck between the two ... A young and sexy daughter, a seasoned and mature mother, and a man wandering between mother and daughter. An unprecedented triangular romance between the three begins.

Takashi, who lived with his wife and his two sisters together, decided to let him sleep for a moment with a request from his friend Yuuki, whom he met a long time ago. Takashi is suspicious of Yuki who seems to be hiding something secret. And while Takashi came to work, he showed the touch of black desire for his mother and wife ...

One day, Minho's dad recklessly brings a performance to his lover and tells Sang-mi to divorce him. Sang-mi and Minho are angry at saying that they can't accept it, and Dad says that if he doesn't divorce within a month, he'll get rid of him without divorce. Minho comforts his mother Sang-mi and says he will try somehow. Minho calls out to play and tells him to leave without breaking the family. When the old dad asked what he liked, he said it was because of the money. He boldly seduces Minho who is trying to expel himself, and says that if he becomes a mother, he can continue to do it with him. Rejecting temptation, Minho comes up with an idea. Minho calls his childhood friend Hyung-jin home and asks him to seduce him to play. I decided to do a favor for my friend's mother, who had been treating me well. Sang-mi heard the plan by chance. After a while, Minho came home with Hyungjin while the musician was alone.