However, Black Butler's popularity remained, and instead of giving the series a Fullmetal Alchemist: Brotherhood treatment by starting over and making a more faithful adaptation, fans received Black Butler: Book of Circus as Season 3. The second season took fan-favorite elements of the first season and disposed of them, delivering completely original content with new, unlikeable main characters, and was consequentially poorly received. Instead, the Season 2 that fans later got is infamously known as being a terrible and lackluster sequel. Unfortunately, with the manga being adapted early on, this meant there wasn't a sufficient number of manga chapters for another season. The production company likely didn't expect the significant popularity and was eager to seize this opportunity. Season 1 aired with 24 episodes, but only a third of the season contained canon material, meaning two-thirds of the season is filler, including an anime-only ending. With its massive success, it's understandable that fans are still hoping for another season, although the series has been subjected to poor treatment. This role tasks Ciel with investigating important cases that have the potential to disrupt England and the crown, and which often involve dirty or immoral methods to get the job done. To do so, he becomes Earl of the Phantomhive manor and takes on his father's position as Queen Victoria's watchdog. Sebastian takes on the disguise of Ciel's butler to always be by his side as the two embark on a journey to satisfy Ciel's vengeance.

The contract states that Sebastian will assist Ciel in accomplishing his goal to seek revenge on those who have wronged him in exchange for his soul. Upon experiencing excruciating abuse at the hands of said members, one night during a sacrificial ceremony, Ciel ends up meeting and forming a contract with a demon, who he later names Sebastian Michaelis. On Ciel's tenth birthday, the Phantomhive manor is attacked and set ablaze, killing both of Ciel's parents and leaving him to be kidnapped, then sold to members of a demon-worshipping cult. The story follows Ciel Phantomhive, a 13-year-old earl living in Victorian-era London. Created by Yana Toboso, the series is published by Monthly GFantasy, with the anime being adapted by A-1 Pictures Studios.

Is black butler season 2 filler