Another Life (Black Butler Fanfic) (SebastianXCiel) (Collab with AlicaDark)

Between the thin curtain that divides the human world from the demonic world, rules have to be set. And let there be one who breaks them, shall see himself thrown aside no longer a curtain in the way. But the rules are not much and not hard to follow. Humans, keep to your contract. Demons, keep away from your feelings....