Jan Di's first and only friend when she transfers to Shinwa High. However, she harbors deep feelings for Gu Jun Pyo and ends up sabotaging Jan Di to get closer to him.
Because of her love for swimming, commoner Geum Jan Di gets a scholarship at Shinwa High. What sets her apart despite her unpopular personality is her courage and optimism. She stands by her principle and willing to take on any blow intended for her friends. And it is also because of this character that she sweeps the arrogant and powerful F4 leader, Gu Jun Pyo off his feet.
Born with a silver spoon in his mouth, the mean and arrogant Jun Pyo has always believed that there is nothing that money cannot buy. But all of that changed when he meets Jan Di who teaches him humility and that everyone is equal when it comes to love.
Grandson of the former President and second member of the F4. He is Jun Pyo’s best friend and Jan Di’s first love. Ji Hoo is musically inclined and can play the violin, guitar, harmonica, piano or conduct symphonies. He epitomizes the prince charming in fairy tales and eventually finds himself falling for Jan Di’s charms.
F4’s perennial playboy and a talented potter too. Handsome and gifted with a brilliant smile, Yi Jeong has also a knack with sweet words that could make any woman fall for him. Even Geum Jan Di’s good friend, Chu Ga Eul could not escape his charming ways.
The young master of a real estate construction company that owns half of Jeju. Among the members of F4, Woo Bin is the most-skilled and capable that even Jun Pyo would not contest. He keeps the peace among F4 members and protects his friends when trouble looms.