The school action fantasy is set in a world where people with magic powers are close to being wiped out. Just as the balance of power and military might had once shifted from swords to sorcery, it shifts once again to guns. Takeru Kusanagi attends the AntiMagic Academy, a training facility for students to become Inquisitors who crack down on the dwindling threat posed by hostile magic users.
However, Takeru cannot use guns at all and can only fight with a sword. As a result, he is relegated to the 35th Test Platoon, the motley “small fry platoon” for fellow odd-ball students. One day, Ouka Ootori, the ex-Inquisitor prodigy joins the platoon.