Story
Mysterious invaders have attacked the Earth! As the Irousu roam the conquered lands, mankind has been driven back, but there’s one last weapon that may still turn the tide: super-powered schoolgirls! At schools like the Shinjugamine Girls Academy, elite classes of Star Guardians alternate between regular schoolwork and learning to kick Irousu behind.
Inhaltsangabe via AniList (Englisch).