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

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

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