Kuroshitsuji: Tango on the Campania.

The fifth musical adapts the Luxury Liner Arc of the manga. Earl Ciel Phantomhive and his demonic butler Sebastian Michaelis take a trip aboard the luxury liner Campania with the mission to investigate a secret society of nobles and their illegal human experiments. Unfortunately for all passengers on board, there are darker forces working behind the secret society, and their attempts to resurrect the dead do not go as planned.