The Case Book of Arne TV anime series released a second key visual and trailer. The trailer and key visual were released after the first episode of the series aired in Japan on January 6 JST.
Unlike the first key visual, the second key visual focused on Arne and Lyn, while Lewis was moved back to the background. The second trailer also focused on the first meeting between Arne and Lyn.

The Case Book of Arne is inspired by Harumurasaki‘s 2D mystery-adventure game. It was first released in 2017 on the Game Magazine website before being released on Steam in 2020. The game also inspired a manga adaptation by Soraho Ino that ran from November 2018 to March 2022.
Harumurasaki’s game can be purchased on Steam where it describes the game as:
A vampire and a girl… who are they?
The two of them have a secret and solve a strange case…
In a world where paranormal activity takes place,
“Player” solves a case in which a non-human becomes a suspect.
Such a “detective adventure” is coming to STEAM.
Use the clues that appeared in the Problem Edition to solve the mysterious case.
If you like logic puzzles and detective stories, give it a shot!
Use the clues that appeared in the Problem Edition to solve the mysterious case.
If you like logic puzzles and detective stories, give it a shot!
The game is divided into “Problem” and “Solve” episodes. In Japan,
the “Solve” episode was preceded by a massive “Guess Who” session, in which over 1,000 people participated.
Solving the mystery with “special rules” involving zombies, vampires, and other monsters has been highly praised by experts in authentic mystery.
Also, the cute looking characters and the fantasy elements surrounding the vampires are very popular!
This is an authentic mystery-solving game that can be enjoyed by both children and adults.
Staff:
- • Director: Keisuke Inoue (My Next Life as a Villainess)
- • Series composer: Murasaki
- • Series composer: Keisuke Inoue
- • Character designer and chief animation supervisor: Akiko Sato (A Condition Called Love character designer)
- • Music composer: Yoshiaki Fujisawa (Takopi’s Original Sin)
- • Animation production: SILVER LINK
Cast:
- • Mariya Ise as Lewis Hartman
- • Koki Uchiyama as Arne Neuntöte
- • Aimi Tanaka as Arne Neuntöte (young)
- • Yuka Nukui as Lynn Reinweiss
- • Yuki Sakakihara as Zisye
- • Yuki Shin as Nachzehrer
- • Yoko Hikasa as Amy
- • Reo Osanai as Diana
- • Momoka Terasawa as Elise
- • Rikuya Yasuda as Bernd
- • Yuto Uemura as Heinz
- • Kakeru Hatano as Kai
Sources: The Case Book of Arne official website, Comic natalie