Park Hyun-sukSungchul's mom Kim Chae-wonGirl at PC cafe Park Jae-hyeonKijoon's friend Kim Jung-pal[Seong Cheol's father] Moon Seung-wookRegista / Sceneggiatore / Montatore Lee Du-hoonDirector Of Photography Ko Dong-hunProduction Sound Mixer Kim Bong-sooSound Supervisor 
