16+ The line between the human world and demons has been erased. The remnants of humanity fight for survival in “bubbles”—protective fields created by sacred relics.
Beyond the bubbles lies the Eternal Chaos—space where a constant struggle goes on between entities that devour each other, trying to become more powerful and absorb the rest of the world.
But some demons took a different path. They began to enter into contracts with humans, becoming their servants and protectors. The contract price is standard—a human soul, which the servant receives after the master dies. And the power a demon gains after fulfilling the contract is in no way comparable to devouring its own kind.