When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
Season 1
Question the Spheres
S1E1 / 31 Mar 2023
Military Training Begins
S1E2 / 31 Mar 2023
School Escape
S1E3 / 31 Mar 2023
Become the Villain
S1E4 / 31 Mar 2023
Will We Ever Go Home?
S1E5 / 31 Mar 2023
Fight or Flight
S1E6 / 31 Mar 2023
Disagreement Among Classmates
S1E7 / 21 Apr 2023
Prisoners at Yongwon Penitentiary
S1E8 / 21 Apr 2023
For Whom the Bell Tolls
S1E9 / 21 Apr 2023
End of the War
S1E10 / 21 Apr 2023
Kim Ki-hae
Kim Chi-yeol
Shin Myung-sung
Im Woo-taek
Shin Hyun-soo
Lee Chun-ho
Im Se-mi
Park Eun-young
Ahn Do-gyu
Guk Young-su
Kim Min-chul
Doh Su-chul
Kim Su-gyeom
Kwon Il-ha
