On a parallel Earth whose development resembled that of our mid‑20th‑century world, mysterious invaders known as the Neuroi appeared. Their attacks devastated entire countries, and ordinary Earth weapons proved powerless against the aliens. Salvation came from a consortium of science and magic in the form of "storm witches"—young girls endowed with magical powers who used a hybrid of a twin witch"s boot and a combat fighter. Recent opposing nations united and sent their best to the legendary 501st Composite Squadron, which won the battle for Britain and cleared Western Europe of the Neuroi. Six months passed. The main heroine, Yoshika Miyafuchi, returned to her homeland in the Fuso Empire, finished high school, and prepared for a career as a healer at her family"s clinic. At that moment new twists of fate caught up with her: a letter from her long‑missing father and news that the Neuroi"s second strike was now in Southern Europe. The pacifist Yoshika had to return to service again, together with her old friends, to protect the beloved planet and finally unravel her father"s disappearance. And it is time to make peace with the Neuroi.