

There may not have been enough material to fill a sequel, but they were damn well going to finish the story to the best of their ability.

It was sad but fairly satisfying and Mari Okada's screenplay took liberties in ways that felt bold and consistent with the characterization up to that point. When all was said and done, Ciel accepts the end of his contract with Sebastian and lets the demon take his soul. The finale isn't even particularly bad, as it displays Sebastian going all out against his opponent in a brutal and even scary manner that feels like the culmination of every peek behind the curtain of his human exterior. An original final antagonist was written to tie off the main plot threads and bring the story to a conclusion. In those remaining episodes, the writers effectively concluded the story of Black Butler similar to Blue Exorcist.

The first season caught up to the most recently completed manga arc at the time by the end of episode 15, with 10 more episodes left. Primarily because the anime's first season went out of its way to conclude the story in its entirety. Sequels diverging from the manga were nothing new, but in the case of Black Butler, the demand for a sequel was especially vexing. The anime aired in 2008, but the manga had only begun two years prior and there wasn't enough content to fill the 24-episode order. When a cult kills his family, Ciel - only a child - makes a deal with a demon named Sebastian to help him avenge his parents, but only if Ciel forfeits his soul once his mission is complete. The series tells the tale of Ciel Phantomhive, heir to the Phantomhive earldom, and its covert responsibilities in service of the monarchy. So when the first season became a big hit, it was only natural that the production committee would greenlight a sequel, not that it was the easiest thing to do. Black Butler was a mainstay of Tumblr anime fandom for good reason, from its pretty depiction of Victorian London to its edgy gothic elements and the complicated relationships of the characters.
