In "Black Butler", there is an episode about a man Liu introduced to the Phantomhive mansion. This man thought he was a partner with Liu and wanted to kill Ciel.

This is the Black Butler Circus Chapter. The Black Butler Circus Chapter is the third issue of the same series of animations adapted from the manga "Black Butler" by Japanese cartoonist Su Liang (translated by Hong Kong TVB as "Black Butler: Circus"). Mystery"). Produced by animation company A-1 Pictures, it began broadcasting in July 2014. On March 22, 2014, the official website of "Black Butler" was updated, revealing the news that the circus chapter of the third season will be broadcast from July. In addition, the OVA's Ghost Castle Murder Incident Chapter (Part 1, Part 2) will also be broadcast in October 2014. It will be released on November 25th and November 15th. The eighth and tenth episodes have been updated.