Based on the original work by Reiko Hinata and Akihiro Yamada, the anime adaptation of the Hikari no Ou novel was announced in 2020.
The only safe source of fire can be obtained by hunting black beasts, Flame Spirits, which reside deep in the forest.
The world is enveloped with a black forest and people have become infected with a pathogen that causes them to burst into flame in the presence of natural fire.
The encounter between the two, who were not supposed to cross paths, will change the fate of the world.