Goo Hye Sun : Geum Jan Di

is from a poor family with a fierce and weed-like determination. She is a cleaner's daughter and sometimes works in her family business and works hard at many other jobs. One day, while making a delivery, she stumbles upon a boy about to jump off a building from being severely bullied at Shinwa High. She rescues the boy and gets a full scholarship to attend Shinwa High. A group of 4 rich, handsome boys called F4 rule the school and are idolized by all the girls. Ignoring F4's power over the school, Jan Di stands up to the leader, Gu Jun Pyo, numerous times. She starts getting bullied by getting a "Red Card" from F4 which makes everyone else in the school automatically bully you. Yun Ji Hoo often helps her and rescues her when she is in danger, which made her fall in love with him. Gu Jun Pyo later falls in love with Jan Di and expresses his love to her. As the series goes on, she realizes she has only Jun Pyo who is her soulmate and will be her husband.