Shin Ha-kyun as Killa

Yoon Ji-hye as She

Kang San as Kid

Park Gil-su as Feces Weight

Koh Soo-hee as Hiccup

Ko Chang-seok as Piano

Kim Min-jun as Ballet

Yeo Jin-goo as Young Killa

Park Choong-seon as Knife Scar (uncredited)

Kim Byeong-ok as Ponytail (uncredited)

Kim Eung-soo as Director (uncredited)

Lee Han-wi as Curator Killer (uncredited)

Yoon Sul-hee as Tail Hair Girl (uncredited)