What happens when 9 girls, who are best friends, meet 9 guys that they completely hate then fall for them.

     Taeyeon, Jessica, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, Yoona, and Seohyun go to Seoul Highschool. When they get to school 9 guys bump into them and make them fall. They didnt even bother to help them up. What were the guys running for? What happens to the girls? Will they become friends or not?