Kim Ki-hae

Kim Chi-yeol

Shin Myung-sung

Im Woo-taek

Shin Hyun-soo

Lee Chun-ho

Lim Se-mi

Park Eun-young

Ahn Do-gyu

Guk Young-su

Kim Min-chul

Doh Su-chul

Kim Su-gyeom

Kwon Il-ha

Ro Jong-hyun

Jang Young-hoon

Woo Min-kyu

Kim Duk-joong

Yeo Joo-ha

Kim You-jung

Ahn Da-eun

Kim In-hye

Lee Yeon

Roh Ae-sul

Kwon Eun-bin

Yeon Bo-ra

Moon Sang-min

Wang Tae-man

Choi Moon-hee

Lee Na-ra

Kim So-hee

Lee Soon Yi

Ji Min-hyuk

Jo Young-shin

Oh Gi-gwang

Jo Jang-su

Shin Su-hyun

Cha So-yeon

Hong Xa-bin

Woo Hee-rak

Shin Hye-ji

Choi Yeon-ju

Lee Soon-won

Kim Won-bin

Hwang Se-in

Yoo Ha-Na

Oh Se-eun

Hong Jun Hee

Kim Jung-Ran

Park So Yoon

Im So-yun

Science High School student

Lee Jong-hyun

Park Hae-jun

Kim Gyu-ri

Science high school student

Lee Jung-min

Seo Ja Yoon

Shin Jae-whi

Corporal Park

Sung Ji-ru

Park Young Il

Park Jung-yeon

Park Yoon-seo

Lee Jang-won

[Math teacher]

Son Ji-na

[Yeon Bo Ra's mother]

Yoo Dam-Yeon

[Kim Chi Yeol's mother]

Jang Hyuk-jin

[Kim Chi Yeol's father]

Shim So-young

[Kook Young Soo's mother]

Kim Do-yeon

[Kim Deok Joong's mother]

Seo Ji-young

[Jang Young Hoon's mother]

Woo Hyun-ju

[Kwon Il Ha's mother]

Kim Won-hae

Choi Yong Sik

Ahn Chang-hwan

[Soldier]

Jang Hyun-sung

Minister of Defense Park Sang Man

Kim Ye-won

Angkko

Han Myeong-hwan

[Soldier]

Shin Min-soo

[Teacher]

Lee Dong-kyu

[Anchorman]

Jung Dong-geun

Park Jung Hoo

Noh Sung-eun

[Soldier]

Lee Dong-yong

Commander

Um Mun-suk

Park Jin-soo

Song Yo-sep

Yoon Bum-sun

You Seong-joo

Cha Moon-hyeok

Yoo Jun

Park Jae-won

Park Jin-soo

Lee Ji-min

Hong Soo Hee

Costume Designer

Han Jung Hee

Cinematography

Sung Yong-il

Director

Kim Soo Hyun

Editor

Jang Jung-do

Executive Producer

Park Eun Woo

Music

Lee Nam-kyu

Writer

Ha Il-kwon

Original Story