- Kim Min-cheol - Doh Su-chul
- Kwon Eun-bin - Yeon Bo-ra
- Moon Sang-min - Wang Tae-man
- ??? - Lee Na-ra
- ??? - Lee Soon Yi
- Ro Jong-hyun - Jang Young-hoon
- Ji Min-hyuk - Jo Young-shin
- Yoon Jong-bin - Jo Jang-su
- Shin Hye-ji - Choi Yeon-ju
- Lee Soon-won - Kim Won-bin
- Shin Myung-sung - Im Woo-taek
- Hwang Se-in - Yoo Ha-Na
- Oh Se-eun - Hong Jun Hee
- Kim Jung-Ran - Park So Yoon
- Lee Jang-won - [Math teacher]
- Son Ji-na - [Yeon Bo Ra's mother]
- Yoo Dam-Yeon - [Kim Chi Yeol's mother]
- ??? - [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]
- Lee Jung-min - Seo Ja Yoon
- Shin Jae-hwi - Corporal Park
- Kim Won-hae - Choi Yong Sik
- Ahn Chang-hwan - [Soldier]
- Hyeon-seong Jang - Minister of Defense Park Sang Man
- ??? - Park Young Il
- ??? - Angkko
- Jeong Dong-geun - Park Jung Hoo
- Noh Sung-eun - [Soldier]
- Lee Dong-yong - [Commander]
- ??? - Park Jin Soo
- Song Yo-sep - Yoon Bum Sun
- ??? - Cha Moon Hyeok
- Park Jung-yeon - Park Yoon Seo
- Yoo Jun - Park Jae Won
- Sung Yong-il
- Lee Nam-kyu
- Ha Il-kwon
- ???
- Park Eun Woo
Shin Hyun-soo interpreta a Lee Chun-ho en la serie.
Kim Ki-hae hace el papel de Kim Chi-yeol.
Lim Se-mi hace el papel de Park Eun-young.
Ahn Do-gyu interpreta a Guk Young-su en la serie.
Woo Min-kyu interpreta a Kim Duk-joong en la serie.
Yeo Joo-ha interpreta a Kim You-jung en la serie.
Ahn Da-eun interpreta a Kim In-hye en la serie.
Kim Min-cheol interpreta a Doh Su-chul en la serie.
Kwon Eun-bin interpreta a Yeon Bo-ra en la serie.
Moon Sang-min hace el papel de Wang Tae-man.
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