Brave Citizen

Shin Hye-sun

So Si-min

Lee Joon-young

Han Soo-kang

Jung-Woo Park

Go Jin-hyeong

Hyuk-kwon Park

So Yeong-taek

Cha Cheong-hwa

Lee Jae-kyeong

Lee Chan-Hyeong

Lee Kwon-joong

Lee Do-eun

Hye-gyeong

Do Eun-ha

Yang Kyung-jin

Kim Hye-hwa

Han Soo-gang's mother

Bae Hyeon-jun

Byeong-jin

Hyo-hee Dong

English teacher

In-jo Yoo

Doctor

Lee Joong-ok

Seo Sang-woo

Nam Jung-woo

Mathematics teacher

Kyeong-ryong Kim

Principal

Lee Kyu-hoi

Vice-principal

Min-ji Kang

Min-ji

Sang-woo Kim

Park Joong-ho