Kim Hyoyeon just returned to Seoul after 6 years, she spent her high school years in America and planned to study in a prestigious school, Southridge University, in Korea. Her parents stayed in America so she will stay at her cousin's house, Choi Siwon who happened to be the team captain of the basketball team of SMU, the Junior Hoops(they are also a gang). But one day he bumped into a guy, Kai, while on her way home, this guy turned out to be a member of the basketball team of Bridgestone University, Exotic Shooters(gang also), that is the worst enemy of her cousin's team. Kai was ordered by their leader to use Hyoyeon to get to know anything about the Junior Hoops so that they can bring them down. At first it was nothing to Kai, but what will eventually happen once he gets to know her better.