Countdown: Cast
Jin Sun-kyu
Si-heon
Sung Yu-been
Yoon-woo
Oh Na-ra
Il-sun
Ko Chang-seok
Principal
Jang Dong-ju
Hwan-ju
Ko Kyu-phil
Man-deok
Kim Min-ho
Bok-an
Lee Jong-hwa
Gao
Choi Hyung-tae
Bok-co
Cho Jung-hun
Jody
Tae In-ho
Song Hee-cheol
Cha Soon-bae
President
Lee Jun-hyeok
Reporter
Lee Hong-nae
Lee Dong-su
Lee Il-hwa
Koo Do-sun
Park Seong-geun
Director
Lee Yoon-hee
Teacher