800 years ago, 3000 dimensional gates opened across the entire world. In that moment, it was as if 3000 different colored eyes opened across the world as hordes of monsters swarmed out of these gates like tears.,Some could destroy city walls with one strike; They had bodies the size of a giant and fed on humans,Some latched onto humans, absorbing their bodies’ nutrients and enslaving humans,Some infiltrated the humans’ cities, disguising themselves as normal human beings while feeding upon human blood to sustain themselves.,In a night, the Human race fell to the bottom of the food chain.,The world had turned into a paradise for monsters…