Joseph Luster
August 6, 2025 
Back in November of last year, an anime adaptation was announced for Harumurasaki’s mystery game The Case Book of Arne. Now the timing has been revealed, with a teaser trailer setting the TV anime series up for a January 2026 premiere.
Keisuke Inoue (My Next Life as a Villainess: All Routes Lead to Doom!) directs, with Akiko Sato as character designer and chief animation director and Yoshiaki Fujisawa on music for the SILVER LINK. production.
The Case Book of Arne Teaser
As previously reported, Scenario writer Murasaki will handle the scripts for the series, with illustrator Harutaro on character designs. The story follows vampire detective Arne Neuntöte, who solves bloody crimes with Lynn Reinweiss, the vampire-loving daughter of a noble family.
In addition to the upcoming anime, there’s also a manga adaptation by Soraho Ina, which launched in Kadokawa’s Monthly Comic Gene magazine in 2018. Those who want to check out the original game can check out an English version on Steam.
The Case Book of Arne Plot
Arne Neuntöte is a vampire detective who manipulates supernatural powers.
Lynn Reinweiß is a nobleman’s daughter who loves vampires.
Their worlds should never have crossed, but they join hands to solve a bloody mystery.
In the darkest of nights, Lynn finds herself in desperate need of help.
Then she wanders into the mysterious city of “Lügenberg”, where non-humans live.
Lynn’s world changes drastically when she encounters “Arne”, a vampire who is called “the worst” in the city.
And tonight, a new “murder case” has occurred.
What is the truth behind the bizarre incidents that take place in a world where humanity and the bizarre intersect?
“Come on, human. You may dance merrily under the crimson moon.”
Source: Official website
