All Cast
Kim Soo-ro
Cheon Seong-geun
Park Bo-young
Han Song-i
Lee Chan-ho
Ok Gi-ho
Kim Hyeong-beom
Cha Seung-ryong
Kim Ki-bang
Meok-tong
Park Jin-Taek
Jin-gook
Kim Yeong-ok
Seong-geun's Mother
Ha Jung-woo
Doctor
Jang Hee-Su
Gi-ho's Mother
Lee Yong-i
Eun-sil's Mother
Lee Hyung-Kwon
Vice-principal
Gong Ho-seok
Teacher Choi
Lee Han-wi
Principal
Kim Sung-ryung
President Lee
Moon Chae-won
Lee Eun-sil
Lee Min-ho
Oh Sang-hoon
Baek Sung-hyun
Baek Jung-goo
Lee Eon-jeong
Chemistry Teacher
Kim Byeong-ok
Publishing Company President
Kim Won-jin
Referee
Ji Hye-in
Ji Yeon
