Other titles: The Twentieth Century Girl , 20segi Sonyeo , Isibsegi Sonyeo
Synopsis: Bo Ra is 17-year-old high school student. She is good at taekwondo and has a bright and positive personality. Yeon Du has a crush on Hyun Jin and asks Bo Ra to find out everything about him. After that, she falls in love with him and goes to the U.S. for heart surgery.