The new production company also revealed that the film will be directed by Lee Kwon, with members of the boy band Super Junior as the main cast. Park Jeong-su of Super Junior, or his stage name, Leeteuk, was originally cast as the president of the school dance club, but since he was involved in a car accident on 19 April 2007, that left him and band-mate Kyuhyun injured, his place was taken by band-mate Kim Hee-chul. Kim Hee-chul's original role as the first victim of the serial attacks in the film was replaced by band-mate Lee Sung-min. Kyuhyun who received the most injury from the accident; right rib fracture, pneumothorax pulmonary hemorrhage, pelvic bone fracture, hemoperitoneum, and foot fracture, ultimately did not participate in the filming to focus on recovering. Kyuhyun's original role as the basketball player from Geosang High School was taken by band-mate, Han Geng.