Seulgi is a result of a one night stand of two young wild individuals. They met at the first time and did IT.  Kwon did not marry Hwang and they remained good friends through the years, as they lived on the same house for the sake of their daughter. They will meet different people and fall in love. How will Seulgi be affected on this? She believes that her parents love each other but they don't see it because they were preoccupied about their own