All Cast
Sul Kyung-gu
Sung-geun
Park Hae-il
Tae-sik
Yoon Je-moon
Chief Oh
Lee Byung-joon
Professor Heo
Ryu Hye-young
Yeo-jeong
Jang So-yeon
Nurse
Lee Kyoo-hyung
Cheol-Ju
Chae Soo-bin
Girl (uncredited)
Jung Hae-kyun
King Lear (uncredited)
Min Kyung-jin
Principal (uncredited)
Heo Joon-seok
Neurosurgeon (uncredited)
Kim Won-jin
Audition Actor (uncredited)
Park Min soo
Young Tae-sik
Son Young-soon
Sung-geun's Mother
Bae Sung-woo
President Baek
Son Sang-kyung
Big Guy
Jeon Kuk-hwan
President
Lee Jun-hyeok
Gi-cheol
Jeong In-kyeom
Director
Kim Se-dong
Older Alumnus
Lee Hyun-gul
Bus Jumper Man
Yun Se-hyun
Demonstration Student