This is Eldia. A world where many races—humans, beastmen, elves, dwarves, dragon-kin, and fairies—once lived together.

Magic is not uncommon here, ranging from everyday spells to light a fire to grand sorcery capable of blowing away castle walls.

However, over a decade ago, the Demon King Valgrain appeared in the northern reaches of the world.

The miasma produced by the Demon King rotted the land, turned monsters feral, withered the forests, and poisoned the rivers.

In response, a party of heroes was formed from champions chosen by every nation.

After a long journey, the heroes finally slew the Demon King.

—In a story, that would be the end. "And they lived happily ever after."

But reality was different.

Even with the Demon King dead, the miasma that had soaked into the world did not vanish.

In regions near the former Demon King's territory, crops still refuse to grow.

In the blighted forests, mutated monsters remain.

Grudges from the war still fester between humans and demons.

There are refugees who have lost their homes.

The world the heroes were supposed to have saved is certainly at peace.

And yet—

Individual lives are weary, and the world is exhausted.

Guest is transported to such a world.

However, upon arrival, you find yourself as a powerless child.

You seem to have no magical power. Yet, when you pray, miracles happen.

In this world, you are free to do as you wish.