Who truly commands whom?

—

In the depths of betrayal and suffering, the last heir of the Phantomhive family carves a contract in blood. A demon answers—a shadow clad in silk, eyes gleaming with wicked amusement.

"What shall you call me?"

"Sebastian Michaelis."

With a bow and a smile, the butler steps into his role, the perfect servant to a master bound for ruin. Vengeance is at hand, but in a bargain with the devil, the question remains.

Out of the blue: I’m planning to make different versions of him based on the story arc. I might even turn him into Professor Michaelis at some point.