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…
Seasons and episodes
1 season · 12 episodes
S1 E1Those Who Dig Pits for Others Will Fall In Themselves
Jan 7, 202623 min
Louis Hartmann joins forces with the members of the Arne Detective Agency to investigate his father's murder.
S1 E2There Is Always Sunshine After the Rain
Jan 14, 202622 min
Lynn remembers the time she first met Arne and hired him to help investigate her father's suspicious behavior.
S1 E3Misfortune Never Visits Alone
Jan 21, 202623 min
Arne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.
S1 E4Those Who Never Gamble Never Win
Jan 28, 202622 min
Lynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.
S1 E5One Swallow Does Not a Summer Make!
Feb 4, 202622 min
Lynn and Arne assemble the servants to review the clues and sniff out the killers through deductive reasoning.
S1 E6Time Will Tell
Feb 11, 202622 min
A distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.
Starring
Frequently asked questions
- Where can I watch The Case Book of Arne?
- The Case Book of Arne is streaming on Crunchyroll. Availability is refreshed weekly.
- How many seasons of The Case Book of Arne are there?
- The Case Book of Arne has 1 season and 12 episodes. Status: Ended.
- Will there be a new season of The Case Book of Arne?
- The Case Book of Arne has ended; no new episodes are scheduled. The final episode aired on March 25, 2026.
- Who stars in The Case Book of Arne?
- The Case Book of Arne stars Mariya Ise, Koki Uchiyama, Aimi Tanaka, Yuka Nukui, Yuki Sakakihara.
