When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
Episodes
Season 1
Media
Backdrops and posters from the title's official gallery
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
Backdrops and posters from the title's official gallery
