A 30-year-old single woman decided to fake a marriage in order to become the person in charge of an overseas project. And the person she faked her marriage to, behind the scenes, turned out to be a gay man who didn't have the courage to come out.
After discovering the secret of the two people, he thought that he was the eldest son of both men and women, and decided that a third party would intervene to make this family with their own hidden agendas more complicated. So three uncles and aunts in their early 30s began a ridiculous but warm life.