Mahoutsukai no Yakusoku

A world where wizards and humans coexist. There are five countries on the continent that is the center of the world, and their land patterns and personalities vary from country to country. In this world, a big moon floats in the sky, and people call it the "Great Calamity" that attacks the world by exerting its mighty power. This is the story of the wizards who fight the Great Calamity. (Source: Ichijinsha, translated)