Dark Wasteland Apocalypse.

After the war between giants and humans, a disaster broke out that could destroy everything in the world. It took humans hundreds of years to reopen a pure land - the "Land of Desolation". It's just that this pure land is full of darkness, pain and disaster. Nearly centuries have passed since that disaster, but the impact of that disaster still continues. As all forces recuperated, the situation gradually stabilized, and those crazy heretics gradually became more active. . . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.