The official Twitter/X for The Case Book of Arne TV anime series have announced the addition of three more new cast members. The anime is scheduled to premiere in Japan on January 6, 2026.
©春紫/Vaka, Inc. ©春紫／バカー／アルネ探偵事務所
The three new additional cast include Yuki Sakakihara as Zisye, Yuuki Shin as Nachzehrer, and Yoko Hikasa as Amy.
They join a previously announced voice cast that is headlined by:
- • Mariya Ise as Lewis Hartman
- • Koki Uchiyama as Arne
- • Aimi Tanaka as Arne (young)
- • Yuka Nukui as Lynn
Keisuke Inoue (My Next Life as a Villainess, the upcoming My Stepmother and Stepsisters Aren’t Wicked) is directing the anime series, with Murasaki and Keisuke Inoue as series screenwriters, Akiko Sato (A Condition Called Love character designer) as character designer and chief animation supervisor, and Yoshiaki Fujisawa (Takopi’s Original Sin) as music composer. SILVER LINK is in charge of the animation production.
The Case Book of Arne is inspired by the 2D mystery-adventure game created by Harumurasaki. The game first debuted in 2017 on the Game Magazine website (who is also credited as a developer) with a serialized format, before being released on Steam in October 2020.
A manga series was launched by Kadokawa in November 2018 and illustrated by Soraho Ina, ending in March 2022. Four total tankobon volumes were released in Japan.
©春紫/Vaka, Inc. ©春紫／バカー／アルネ探偵事務所
Steam describes the main synopsis of The Case Book of Arne video game as:
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.”
Sources: The Case Book of Arne Official Twitter (1) (2) (3), Anime News Network
