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Summary: The Pillars suddenly appear above Earth above all life. Odin the ruler of Valhalla and a god came to aid humanity with the maidens called Valkyries. A Valkyrie named Brunhilde find and summoned 4 individuals called the 4 Cardinal Heroes to aid the battle maidens Walküres as the threat approached on both land and air.

Naofumi x Claudia
Ren x  Azuzu
Itsuki x Sonoka
Motoyasu x Miyako

(Note: Naofumi, Ren, Itsuki and Motoyasu will be part of the same world as the battle maidens.)