Who marries at the age of 18? Kim Yongman, the daughter of the Dragon Queen, escapes from the Dragon Palace to avoid a political marriage. She enters high school with the dream of becoming the top student in the entire school. However, the top student Shim Hae-soo, who is also her seatmate, isn't too happy about the appearance of a rival... Despite being busy with their studies, these two keep getting entangled?! A romance(?) of an 18-year-old boy and girl trying to improve their grades?