The year of 1939. It was when the "Neuroi" appeared, anybody knows where they are from, or what they're up to in the Earth. But the fact is that they attacks drove people out of their towns and cities. In order to took arms againts them, humanity develops a new anti-Neuroi weapon the "Strike unit", thus in order to combat against those monsters is by the power of magic, this new devices power-up and amplificate the power of magic-female wilders. To use this devices, young witches from over the world where centralized at an Elite tast force unit called: The 501st joint fighter wing, known by the people as "Strike Withces"