The Case Book of Arne 2026
What is The Case Book of Arne?
The Case Book of Arne is an animation and mystery television series that premiered on January 1, 2026. The series features voice cast members Rimi Nishimoto, Yuko Miyamura, Soshiro Hori, and Hiroyuki Kinoshita, and is adapted from a Japanese Gothic horror mystery adventure game by Harumurasaki with character designs by Harutaro.
- Type
- TV series
- Year
- 2026
- Status
- Ended
- Episodes
- 12
- First aired
- Jan 7, 2026
- Last aired
- Mar 25, 2026
- Original language
- JA
- Origin
- JP
- Networks
- Nippon TV
- Genres
- Animation, Mystery
- Updated
At a glance
- Rating
- ★ TMDB users: 6.5/10 from 8 votes
- Format
- 1 season · 12 episodes
- Status
- Ended
- Network
- Nippon TV
Where to watch in United States
Stream
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How long to binge?
Estimate the schedule using 12 episodes and an average 45-minute runtime.
Trailer
Overview
The Case Book of Arne is an animation and mystery television series that premiered on January 1, 2026. The series features voice cast members Rimi Nishimoto, Yuko Miyamura, Soshiro Hori, and Hiroyuki Kinoshita, and is adapted from a Japanese Gothic horror mystery adventure game by Harumurasaki with character designs by Harutaro. Season one consists of twelve episodes. The story follows Louis Hartmann, whose father, a private detective investigating a string of murders, is killed. Rumors circulate that the murders are the work of a Grave-Digger Vampire. Although Louis is not keen on superstitions and dismisses the vampire rumors in his vow to catch the culprit himself, his life takes an unexpected turn when a self-proclaimed detective named Arne Neuntote and his assistant, Lynn Reinweiss, appear.
Should you watch it?
“An orphaned boy joins forces with a mysterious detective to investigate a string of murders.”
- Follows Louis Hartmann as he seeks the killer of his private detective father.
- Features the arrival of self-proclaimed detective Arne Neuntöte and his assistant Lynn Reinweiß.
- Explores a dark mystery involving rumors of a Grave-Digger Vampire.
- The story deals with a string of murders and a dark gothic horror atmosphere that may not suit viewers seeking lighthearted fare.
Watch it if you enjoy animated mystery series involving gothic horror and detective investigations.
The tone is gothic and mysterious, reflecting an animation and mystery adventure based on a Japanese game.
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Cast
Episode guide
Spoiler-Safe Browsing Progress
Season 1 · 12 episodes
Open the complete Season 1 guide & lore primer →- E1 Those Who Dig Pits for Others Will Fall In Themselves Mytharc Jan 7, 2026
- E2 There Is Always Sunshine After the Rain Core Jan 14, 2026
- E3 Misfortune Never Visits Alone Mytharc Jan 21, 2026
- E4 Those Who Never Gamble Never Win Core Jan 28, 2026
- E5 One Swallow Does Not a Summer Make! Core Feb 4, 2026
- E6 Time Will Tell Core Feb 11, 2026
- E7 Eating Whets the Appetite Core Feb 18, 2026
- E8 Desire and Love Make All Burdens Lighter Core Feb 25, 2026
- E9 Not All That Glitters Is Gold Core Mar 4, 2026
- E10 Different Countries, Different Customs Core Mar 11, 2026
- E11 Birds of a Feather Flock Together Mytharc Mar 18, 2026
- E12 All's Well That Ends Well Mytharc Mar 25, 2026
Frequently asked questions
Where can I stream The Case Book of Arne?
Streaming availability can be checked through platforms like The Movie Database.
Is The Case Book of Arne worth watching?
It is worth watching if you enjoy animated mystery and gothic horror stories about detective investigations.
What is the binge duration for the first season?
Season 1 consists of 12 episodes which premiered starting January 7, 2026.
Are there essential episodes to watch?
The first season contains 12 episodes that follow the ongoing mystery of Louis Hartmann and Arne Neuntöte.
■ Ended / Final Season Complete Renewal tracker
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