Kuroshitsuji Book of Murder
In the behest of the Queen, Earl Ciel Phantomhive hosts a lavish dinner party attended by a number of the best members of polite society–along with fighting writer, Arthur. But since the party reaches its high, a dreadful murder happens and none aside from the Earl himself is suspected of the offense.
As a violent storm rages on outside, the death count continues to climb. The Phantomhive family and their distinguished guests discover they need to cooperate to be able to solve this mystery before they too fall prey to this mysterious murderer. But, it appears that not the best butler, Sebastian Michaelis, is secure from this terror.