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