Steel Cold Winter

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Shi-hoo Kim

Yoon-soo

Moon Chang-gil

Executive director Park

Park So-dam

Ji-yun

Hee-Jun Oh

Hyung-joon

Gwang-Sup Kim

Gwang-seop

Tae-hee Lee

Young-jun

Jang In-sub

Young-jae

Seo Hyun-woo

Math teacher

Han Hee-Jung

Homeroom teacher

Doo-Gyum Jung

Yoon-su's father

Jo Han-chul

Clinic Doctor

In-gi Jeong

Hye-won's Father

Gi Ju-bong

Young Jun's Father

Yoon Kyung-ho

Homeroom teacher

Jang-You Lee

Ji Yun's Father

Kim Yoon-hye

Hae-won

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