When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
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Top cast
Kim Ki-haeKim Chi-yeol
Shin Myung-sungIm Woo-taek
Shin Hyun-sooLee Chun-ho
Im Se-miPark Eun-young
Ahn Do-gyuGuk Young-su
Kim Min-chulDoh Su-chul
Kim Su-gyeomKwon Il-ha
Ro Jong-hyunJang Young-hoon
Woo Min-kyuKim Duk-joong
Yeo Joo-haKim You-jung
