Kuroshitsuji ~ Across Time.

When Alice is thrown into the world of Black Butler with the help of her new demon friend Claude, new servant Ambrose, and their cursed book, she must immediately join Ciel in finding Jack The Ripper. Despite knowing the events and murderers of the crimes, rules and regulations prevent her from changing the events drastically. As she continues in cases with her supposed new 'brother' Earl Phantomhive, Alice discovers secrets about the demons she spends so much time with, as well as the impending disastrous change that awaits from her exposure to this new world.