Black Butler (Kuroshitsuji) manga by Yana Toboso begins serialization in Monthly GFantasy magazine.
The first season of the Black Butler anime adaptation airs in Japan, bringing the series to a larger audience.
The Black Butler: Book of Circus anime adaptation airs, adapting the 'Noah's Ark Circus' arc from the manga.
The two-episode OVA Black Butler: Book of Murder is released, continuing the story from the manga.
Black Butler: Book of the Atlantic anime film premieres, adapting the 'Luxury Liner' arc from the manga.
The birth of Ciel Phantomhive, the heir to the Phantomhive household and future Queen's Watchdog.
Ciel's parents are killed in a mysterious fire, and Ciel is kidnapped and tortured by a cult called the Noah's Ark Circus.
Ciel forms a contract with the demon Sebastian Michaelis to seek revenge against those who destroyed his family.
After being rescued with Sebastian's help, Ciel returns to his role as head of the Phantomhive household and Queen's Watchdog.
Ciel begins investigating crimes in London on behalf of the Queen, marking the start of his career as the Queen's Watchdog.
Ciel and Sebastian investigate the mysterious circus involved in the kidnapping and deaths of children, confronting the dark secrets behind it.
Ciel investigates a series of gruesome murders in London attributed to Jack the Ripper, uncovering a supernatural plot behind the killings.
The main household staff, including Mey-Rin, Bardroy, and Finnian, are introduced, playing key roles in Ciel's life and operations.
The reaper North is introduced, adding complexity to the supernatural aspects of Ciel's investigations.
Ciel holds the annual Phantomhive family revival party to maintain the family's social standing and gather intelligence.
