Overview
When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
Cast
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
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