Kuroshitsuji

Ciel Phantomhive lost his family and home to a conspiracy that left him captive during the darkest period of his life. There he made a contract with the demon Sebastian Michaelis: Sebastian would give him the power and means to take revenge, and in return would claim Ciel's soul once that vengeance was complete.

Ciel now heads the Phantomhive family and serves as Queen Victoria's "Guard Dog," investigating crimes and threats that Victorian England cannot handle openly. Sebastian stands beside him as the perfect butler, displaying inhuman skill in everything from serving tea to eliminating enemies. Each case brings Ciel closer to the truth he seeks and Sebastian closer to the payment he has been promised.