Black Butler

Black Butler (Japanese: 黒執事, Hepburn: Kuroshitsuji) is a Japanese manga series written and illustrated by Yana Toboso. It has been serialized in Square Enix's shōnen manga magazine Monthly GFantasy since September 2006. The series follows Ciel Phantomhive, the 12-year-old Earl of Phantomhive serving as the Queen's Watchdog. He is tasked with solving crimes in the underworld of Victorian-era London. Ciel has formed a contract with demon Sebastian Michaelis, who disguises himself as his butler, to seek revenge on those who tortured him and murdered his parents. In exchange for his services, Sebastian will be allowed to consume Ciel's soul.

A 24-episode anime television series adaptation, produced by A-1 Pictures, aired from October 2008 to March 2009. A second 12-episode season aired from July to September 2010; this season features two new main characters and has an anime-original storyline which does not feature manga content. Another series, titled Black Butler: Book of Circus, was broadcast between July and September 2014. A two-part theatrical original video animation (OVA), titled Black Butler: Book of Murder, screened in Japanese theaters in October and November 2014. A live-action film adaptation was released in Japan in January 2014. An animated film, titled Black Butler: Book of the Atlantic, premiered in Japan in January 2017. A fourth anime season produced by CloverWorks, titled Black Butler: Public School Arc, premiered in April 2024.

In North America, the series has been licensed by Yen Press. It was published in Yen Plus from August 2009 to July 2010. The anime series was licensed by Funimation. Funimation lost the rights to the first two seasons, and they were later acquired by Aniplex of America.

By March 2024, the Black Butler manga had over 35 million copies in circulation, making it one of the best-selling manga series.