MTL - Worlds’ Apocalypse Online

Synopsis

The end of all worlds approaches. The Demon King Order harvests lives from all manners of living beings. Within this darkness full of despair, A single person escaped from space-time, returned to before the world collapsed, determined to change the fate of the past. But as time pass, he gradually finds out that the Apocalypse isn’t quite as simple as he thinks… - Description from novelupdates