Mu-Gyul is the lead vocalist and guitarist for a rock band. He is chic and lives a carefree bohemian lifestyle. He doesn't talk much and only wants to make music. Mu-Gyul doesn't care about success. He also suffers trauma with his mother and, because of this, becomes tired of the women he dates and leaves them. Mu-Gyul is a bad guy to women. When it appears Mu-Gyul will never get married a once-in-a-lifetime opportunity comes about. He meets Mary, money becomes involved and a 100 days of marriage ensues. During this time, Mu-Gyul not knowing the meaning of family, surprisingly falls in love with Mary who is combative, loyal, and spunky. Mu-Gyul finds himself becoming a rival of Jung-In for Mary's love
