Rule Horror: Are You Sure Everyone You See Is Human?

[No female lead + feel-good power fantasy + invincible protagonist + suspense + horror + mystery + plot-driven]

There are too many people in the world these days, thanks to the chaos of the turbulent years long ago.

All the demons and monsters that were beaten and smashed to pieces reincarnated as humans, giving rise to all sorts of unruly spirits and monsters reborn as people.

They’re excellent at disguising themselves. They may have grown human faces and bodies, but their hearts haven’t changed!

So... how can you be sure that everything your eyes see... is really human?