Black Butler (Kuroshitsuji) is a horror/mystery/supernatural/comedy manga byToboso Yana set in Victorian London. It follows the exploits of the young Earl Ciel Phantomhive, the latest head of a family whose job it is to deal with the less savory and less legal sides of society to ensure the continued safety of the Queen. From putting up with comically inept servants and unexpected visits by his fiancee to stalking serial killers in the backalleys of the city, Ciel's life is never easy. Luckily, he has his butler, Sebastian, to help him along the way. Sebastian is the perfect butler: he cooks, cleans, gathers information, acts as a bodyguard, and is skilled in all manner of hobbies approved by high society. He's also a powerful demon under contract to Ciel. Needless to say, life is extremely interesting in the Phantomhive household...

More information can be found at Devil's Food Cake: A Black Butler site.