When humanity is driven to the brink of despair by an alien threat called Pillars, a self-proclaimed god named Odin appears and bestows upon the people the power of "Valkyries"—battle maidens who pilot vintage aircraft called Hero Wings. Claudia "Schwertleite" Bruford is the ace of the European Valkyrie Wing. When Japan's S-class Valkyrie passes away in battle, Claudia is relocated to Japan as a replacement. However,...