The Past or The Present ?

Kwon Jiyong is a son of a wealthy family that owns a big company that he'll be the one be the president.Choi Seunghyun is a wealthy man that own a big company too.Jiyong and Seunghyun meet on a party that one of their friends invite them and that time they meet each other.After what happened to the party the two started going out,until the two confesses to each other.No one knows about their relationship even their parents.The two of them are having a happy relationship but Seunghyun won't let Jiyong knows about what he's doing because he won't let Jiyong be part of it,until a big fight happened because when Seunghyun was in a vacation he did not bring Jiyong he brings a beautiful woman instead and Jiyong can't take it anymore,the two broke up.Seunghyun and Jiyong meet again and work together because of their company need.Jiyong finally knows that Seunghyun has a new boyfriend that will become his fiance and notice that Seunghyun change. There is a lot of jealousy.Lasty,who will be Seunghyun's true love