Azure Chronicles: Apocalypsium

After finding themselves in an oddly familiar place, although not realising it, at the end of their lives: Zalroth and Chronia are greeted by someone they both do and don't recognise who offers to grant them a wish. Having nothing to lose given they're already dead, the two, but mainly Chronia, agree to make a wish.

Over eight decades after the Strife of Chaos was destroyed and the disappearance of the last original heavenly heroes. The world the heroes once called home morphed far from the state it was in upon their departure, less in the literal sense and more in its "presentation" and marred by unforeseen chaos. During the many decades, the world was plunged into chaos as otherworldly monsters of aether descended on the world, scaring the world as it turned all living beings into zombie-like monsters.

Although the widespread chaos had subsided, the world was still strained to its limits. Even within the safety of the sanctuaries of current-day Heavenly Heroes, the common folk continued to live in constant fear of the aether beasts roaming the land. After learning the true extent of the aether beast's influence, Temperance made it his sole objective to rid the aether beasts from the world... at least that's what he tells others.