5 Evils is a Manga/Manhwa/Manhua in english language, MONSTERS series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

A land where humans and demons are always at odds against each other. Although humans were abundant in numbers, it was just enough to keep them alive, barely keeping the balance between the two sides. Will it be the humans who will take over the world? Or will it be the demons? In order to defeat the demons, a battle to the death begins.