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 Chi-yeol
Im Woo-taek
Lee Chun-ho
Park Eun-young
Guk Young-su
Doh Su-chul
Kwon Il-ha
Jang Young-hoon
Kim Duk-joong
Kim You-jung
Kim In-hye
Roh Ae-sul
Yeon Bo-ra
Wang Tae-man
Lee Na-ra
Lee Soon Yi
Jo Young-shin
Jo Jang-su
Cha So-yeon
Woo Hee-rak
Choi Yeon-ju
Kim Won-bin
Yoo Ha-Na
Hong Jun Hee
Park So Yoon
Science High School student
Park Hae-jun
Science high school student
