Ever wonder what drives the demons and beast in so many stories to hunt down the hero relentlessly, slay humans by the thousands, to strive so hard to wipe out all? Is it truly simply lust for power or hatred to humans? Why should a demon who had never set foot on a world immediately start a campaign to burn entire empires and crush all those who oppose them. Is it really just because it's what they are and nothing more?
After dying in an accident Ro wakes up to a strange world surrounded by creatures of all kinds proclaiming him the demon lord and begging him to save their world. An abnormality has descended upon the world draining the life force and luck from all those around it. Even though the universe itself rebels at it's existence restlessly trying to erase it, it survives at the cost of those around it. Born of the most ignorant races it titles itself
Ace Evolution (prequel)
The First Evolution (sequel)