In the face of a looming threat from 'mad spirits', individuals harness magic to combat it. Masou Academy, nestled in an enchanting university town, nurtures adept magic users and houses the formidable Exmachina—a unique and potent magical weapon known as the Spirit Machine. Kazuha, a determined boy with no magical abilities, embarks on a quest for power. Despite leaving the land once before, he returns and undergoes a special ritual enabling him to wield a magical weapon. His motivation? The well-being of his childhood friend, Kikyo. Unexpectedly, the weapon crafted for him takes on the form of a girl, adding a twist to his journey.