Black Butler is an anime set in Victorian London about a boy from a wealthy family who traded his soul in return for being served by "one hell of a butler" (a pun from the subtitles that you'll probably get sick of by the end of the series and isn't even an accurate translation of the original Japanese phrase) — literally a demon butler with supernatural abilities. The two make it their business to fight crime for whatever reason.
I liked the general concept of the story, though the episode-to-episode execution of the plot can be somewhat weak. There is a very slight mystery element, but the viewer isn't really provided with enough information to be able to make any deductions.
The animation quality is average and appears to have been produced with limited resources. Despite that, I did like the stylised visual aesthetics.
The voice acting is consistently good. There aren't any outstanding performances, but they all suit the characters well. I liked the opening and ending songs. For the ending song in particular, it was quite a nice surprise to hear BECCA's vocals in it, which I recognised instantly. The rest of the audio elements are minimal and don't draw attention to themselves.
Overall, Black Butler is a mixture of weak and decent components. I enjoyed it a fair amount.
