Black Butler: Book of Circus

"Black Butler: Book of Circus" (Japanese: 黒執事 Book of Circus) is the third season of the "Black Butler" anime television series, adapting the Circus Arc from the manga series. The anime aired from July 11, 2014, to September 12, 2014, with a total of 10 episodes. Set in late-nineteenth-century London, the story follows the Noah's Ark Circus, whose dazzling performances capture the attention of audiences. However, children begin mysteriously disappearing in London, correlating with the circus’s movements. Queen Victoria sends her notorious guard dog, Earl Ciel Phantomhive, and his demon butler, Sebastian Michaelis, to investigate undercover. Ciel and Sebastian infiltrate the circus as performers, trying to uncover the truth behind the disappearances. As they balance their circus acts with their secret mission, they face growing suspicion from the other performers and the looming threat of the circus’s mysterious benefactor. Ultimately, their discoveries shake Ciel to his core.