Lin katie ,a adventurous girl and is a major attraction to boys. She doesnt like it but when she moves to a new school . How can her normal life turn into a extreme adventure . Key, a major playboy and always sleeps with girls every night . Until he meets katie . He is surprized that she is not falling for him. What will he do ? Until then he and she is falling for each other . Without themselves knowing . Jonghyun, Taemin , Minho and Onew are friends of Key . Mini , Miyoung , Angelina and Sandy are friends of Katie .