Kang Yang-hyun
Ahn Jae-hong
Cheon Gi-beom
Lee Sin-young
Principal's Wife
Kang Ae-sim
Gi-beom's Father
Min Moo-je
Gi-beom's Mother
Choi Jung-yoon
Teacher 1
Bae Seong-il
Teacher 2
Kang Shin-chul
Teacher 3
Yoo In-hye
Teacher 4
Song Chang-gyu
Yongsan High school coach
Jang Hyun-sung
50s Man
Park Sang-myeon
Sportscaster
Park Jae-min
Bae Gyu-hyuk
Jeong Jin-woon
Imho Middle School Coach
Lee Sang-won
Referee
Baek Do-kyeom
Jemulpo High school 7
Kim Won-shik
Hong Sun-gyu
Kim Taek
Jung Kang-ho
Jung Gun-joo
Heo Jae-yoon
Kim Min
Jung Jin-wook
Ahn Ji-ho
Teacher Lee
Lee Jun-hyeok
Messy hair
Kim Hoe-jin
Gyu-hyuk's Mother
Kim Soo-jin
Director
Jang Hang-jun
Adaptation
Screenplay
Kim Eun-hee
Martial Arts Choreographer
Park Young-sik
Executive Producer
Ha Jung-woo
Cha Hyun-woo
Jang Won-seok
Kwon Sung-hui
Camera Operator
Seo Dong-gi
Original Music Composer
Nene Kang
Director of Photography
Mun Yong-gun
Set Decoration
Kim Jung-hyun
Editor
Heo Sun-mi
Special Effects Supervisor
Hong Jang-pyo
Makeup & Hair
Sin Eun-yeong
Production Design
Lee Mi-kyoung
Props
Im Ho-sang
Sound Supervisor
Gong Tae-won
Lighting Director
Park Ji-sung
Ji Hyung-jin
Costume Design
Choi Mi-yeon
Kang Joo-shin
Producer
Yoo Young-chae
Park Yoon-ho
Kim Ji-hoon
Production Sound Mixer
Shon Yong-ik
Digital Intermediate
Park Jin-ho
VFX Supervisor
Yoon Jae-hun
Key Grip
Park Beom-jun