The Void Cataclysm, also known as the Void Invasion, is simply an event where numerous holes suddenly appear in the sky, from which dense, malevolent creatures, resembling dark clouds, emerge. Wielding blood-red scythes of death, they reap human lives like wheat, plunging humanity into a crisis teetering on the brink of extinction. No one knows how the Void came into being or how it appeared on this planet. Its arrival caught humanity completely off guard, resolving the world's overpopulation problem within a single day and propelling humanity a giant leap towards becoming a rare species.