Book Of Circus - Episode 1 - Kuroshitsuji:

Critics and fans generally view it as a effective "refresher".

: The "Book of Circus" arc truly begins in the final minutes when Ciel receives tickets to the Noah's Ark Circus and an order from the Queen to investigate missing children. Reception and Narrative Depth Kuroshitsuji: Book of Circus - Episode 1

: Reviewers at ViscountXela highlighted the beautiful contrast between a butler’s morning and a demon’s night, which captures the core of their contract. Critics and fans generally view it as a

: Many noted the vibrant animation and the return of the band SID for the opening theme as high points that kept the show feeling "fresh" yet familiar. : Many noted the vibrant animation and the

: The plot revolves around a typical day at the manor where Sebastian manages the incompetent staff while preparing for a guest, Cedric Brandel.

: Some reviewers at The Geekiary found the "flying cutlery" and comedic servant mishaps a bit silly for a show about demon contracts, though they admitted it successfully pulled them back into the mystery by the end.