The Case Book of Arne_
Original: アルネの事件簿
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…
Network
Nippon TV
Episodes
12
Updated Feb 16, 2026
WHERE TO WATCH
Prime Video
1 country
Anime Times Amazon Channel
1 country
dAnime Amazon Channel
1 country
FOD Channel Amazon Channel
1 country
Hulu
1 country
TVING
1 country
DROPTHE_ GOSSIP
Overview
The Case Book of Arne has 1 season with 12 episodes spanning 2026-present.
CAST (7)
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)
SEASONS (1 season, 12 episodes)
SEASON 1
01
Those Who Dig Pits for Others Will Fall In Themselves
Louis Hartmann joins forces with the members of the Arne Detective Agency to investigate his father's murder.
02
There Is Always Sunshine After the Rain
Lynn remembers the time she first met Arne and hired him to help investigate her father's suspicious behavior.
03
Misfortune Never Visits Alone
Arne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.
04
Those Who Never Gamble Never Win
Lynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.
05
One Swallow Does Not a Summer Make!
Lynn and Arne assemble the servants to review the clues and sniff out the killers through deductive reasoning.
06
Time Will Tell
A distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.
07
Episode 7
08
Episode 8
09
Episode 9
10
Episode 10
11
Episode 11
12
Episode 12
SERIES INFO
1
Seasons
12
Episodes
Returning Series
Status
NETWORKS (1)
Nippon TV
DETAILS
First Aired
Status
Returning Series
Seasons
1
Episodes
12
Language
Japanese
Country
Rating
7.0/10 (2 votes)
Popularity
7
IMDB
FREQUENTLY ASKED QUESTIONS
What is The Case Book of Arne about?
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 can I watch The Case Book of Arne?
The Case Book of Arne is available on Prime Video, Anime Times Amazon Channel, dAnime Amazon Channel, FOD Channel Amazon Channel, Hulu. Availability varies by region.
How many seasons does The Case Book of Arne have?
The Case Book of Arne has 1 season with 12 episodes total.
Who stars in The Case Book of Arne?
The cast of The Case Book of Arne includes Mariya Ise, Koki Uchiyama, Aimi Tanaka, Yuka Nukui, Yuki Sakakihara.
What is the rating of The Case Book of Arne?
The Case Book of Arne has a rating of 7.0 out of 10 based on 2 votes on TMDB.
Is The Case Book of Arne still running?
The Case Book of Arne is currently active with a status of "Returning Series."
GENRES (2)
Animation
Mystery
