Ha- joon , He is the youngest son of Baek Hyeon, a wealthy business tycoon.he is business management student with anger management issues, gets into a brawl with another student and is asked to either apologize or leave college. Ha- joon prepares to leave but stays back after seeing a first year student, Ji-won.Ha- joon, along with his friend Si-woo, goes to first year class room and announces that he is in love with Ji-won and she is exclusive to him.Ji-won, although initially afraid of his nature, eventually reciprocates his feelings and their relationship grows stronger over the course of next 3 years. Ha- joon's father rejects Ji-won and Ha- joon marriage because she middle class family belongs to us.Ha-joon father seperated Ji-won and Ha-joon each other.Ha- joon's father sent Ha-joon USA . He gets an apartment flat with the help of his friend james and joins as a house a start a small startup company. Unable to forget her, he becomes alcoholic and smoke addict. He befriends one of his famous model anna , and asks her for a no strings relationship but eventually rejects her after she grows feelings for him. After collapsing in collaboration meeting under the influence of alcohol , his collaboration meeting is temporarily canceled and he is father return call hime back to Korea. Next morning, his grandmother dies and he reconciles his father to give up his self-destructive habits. While on vacation, he learns that Ji-won is unhappy with her meets her after returning home.Ha- joon convinces Ji-won, now a pregnant woman, to live with him. Ji-won reveals that he is the father to the child and she left home after separation and living alone ever since working in tution teacher . They get married to each other.They marry and reunite with their families, with Ha- joon's father apologizing to them and the families coming together. Ha - joon and Ji-won end up on a beautiful garden with their baby.