Following a first episode broadcast that delivered a story-shaking twist, The Case Book of Arne anime released a brand-new trailer today, along with a key visual featuring an updated tagline that reads, "Dance with joy." Crunchyroll is now streaming the supernatural mystery series . The Case Book of Arne Trailer The Case Book of Arne Key Visual RELATED: Crunchyroll Winter 2026 Anime Season Lineup Announced! Keisuke Inoue ( My Next Life as a Villainess: All Routes Lead to Doom! ) directs The Case Book of Arne anime at studio SILVER LINK., with series composition by Inoue and Murasaki, character designs by Akiko Sato ( Betrothed to My Sister's Ex ) and music by Yoshiaki Fujisawa ( Mushoku Tensei: Jobless Reincarnation ). Crunchyroll describes the story: Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis… Source: Comic Natalie
