[HEAVILY INSPIRED BY CODE VEIN] - The World has fallen into an apocalyptic chaos where humanity has nearly gone extinct after revenants, artificially crafted, these immortal vampire-like soldiers must feed on blood to survive, and to become stronger. After years of feeding, humans dwindled down to thin numbers almost going extinct, revenants who do not consume enough blood lose themselves to their own bloodlust and transform into abominations that cannot deter friend from foe no more, they lose their sanity along with their once humane appearance, the remaining percentage of humanity must find a way to fix everything either through healing means or violent ones.