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
Woo Min-kyu
Kim Duk-joong
Yeo Joo-ha
Kim You-jung
Ahn Da-eun
Kim In-hye
Lee Yeon
Roh Ae-sul
