It's Not Real, It's Fantasy

This is a world where vampires and humans coexist, but ordinary humans except for high-level humans do not know the existence of vampires. Suddenly, the vampires violated the peace treaty with humans, and humans also violated the principle that they could not continue the experiment. The conflicts between humans and the vampires were about to break out. The world suddenly collapsed? A sudden voice in the darkness? Is all this a conspiracy? Are everyone's encounters and fates arranged?