Ahn Jae-hong
Kang Yang-hyun
Acting
Lee Sin-young
Cheon Gi-beom
Acting
Jeong Jin-woon
Bae Gyu-hyuk
Acting
Kim Taek
Hong Sun-gyu
Acting
Jung Gun-joo
Jung Kang-ho
Acting
Kim Min
Heo Jae-yoon
Acting
Ahn Ji-ho
Jung Jin-wook
Acting
Lee Jun-hyeok
Teacher Lee
Acting
Kim Hoe-jin
Messy hair
Acting
Kim Soo-jin
Gyu-hyuk's Mother
Acting
Kang Ae-sim
Principal's Wife
Acting
Min Moo-je
Gi-beom's Father
Acting
Choi Jung-yoon
Gi-beom's Mother
Acting
Bae Seong-il
Teacher 1
Acting
Kang Shin-chul
Teacher 2
Acting
Yoo In-hye
Teacher 3
Acting
Song Chang-gyu
Teacher 4
Acting
Jang Hyun-sung
Yongsan High School Coach
Acting
Park Sang-myeon
50s Man
Acting
Park Jae-min
Sportscaster
Acting
Lee Sang-won
Imho Middle School Coach
Acting
Baek Do-kyeom
Referee
Acting
Kim Won-shik
Jemulpo High School 7
Acting
Jeon Yeong
Doctor
Acting
Lee Tae-young
Police
Acting