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…

The Case Book of Arne (2026)

★ 6.5/10 January 7, 2026 1 season

AnimationMystery

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…

Where to watch

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Trailer

Cast

Mariya Ise Louis Hartmann (voice) Koki Uchiyama Arne Neuntöte (voice) Aimi Tanaka Young Arne Neuntöte (voice) Yuka Nukui Lynn Reinweiß (voice) Yuki Sakakihara Zisye (voice) Yuuki Shin Nachzehrer (voice) Yoko Hikasa Amy (voice)