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.
Seasons
Creator
Director
Cast
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Kim Ki-haeKim Chi-yeol -
Shin Myung-sungIm Woo-taek -
Shin Hyun-sooLee Chun-ho -
Lim 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 -
Ahn Da-eunKim In-hye -
Lee YeonRoh Ae-sul -
Kwon Eun-binYeon Bo-ra -
Moon Sang-minWang Tae-man -
Choi Moon-heeLee Na-ra -
Kim So-heeLee Soon Yi -
Ji Min-hyukJo Young-shin -
Oh Gi-gwangJo Jang-su -
Shin Su-hyunCha So-yeon -
Hong Xa-binWoo Hee-rak
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