Little Miss Demon Specialist (A Black Butler Story)

When Margaretta Midford comes to London from an abbey deep in the countryside, looking for her family, she quite literally runs into her newfound cousin, Ciel Phantomhive, who is out for a day on the town with his butler. Margaretta can tell that something fishy is going on, but she doesn't think much of it. Until, that is, Ciel invites her to stay at the manor. Margaretta has never disliked someone so quickly, and yet now she's going to live with him and his obviously-not-human butler.