This manga takes place in a fantasy, sci-fi world where magic exists. The protagonist, Iska, is a soldier from the Empire, which has been at war with the Sovereignty, a nation ruled by mages, for over a century. Iska dreams of a future where humans and mages can coexist in peace instead of being enemies.

Plot Summary

Iska is imprisoned after freeing a mage (who later returns in the story). Upon his release, he is given a new mission: defeat the Ice Calamity Witch, a powerful mage from the opposing side. Along the way, he reunites with his old squad and faces numerous challenges.