The Case Book of Arne (Arne no Jikenbo) is a gothic mystery anime about a detective, his assistant and a series of strange murders. Based on a video game, it aired in early 2026. Here is what to know.
What Is the Story About?
After his detective father is murdered, Louis dismisses rumors of vampires and sets out to find the killer. Then a mysterious detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, arrive in the gothic city of Lügenberg. Their investigation opens a new door for Louis, and the trio begin to solve cases together.
Main Characters and Cast
- Louis Hartmann, an original character for the anime, voiced by Mariya Ise.
- Arne Neuntöte, voiced by Kōki Uchiyama, with Aimi Tanaka as young Arne.
- Lynn Reinweiß, Arne’s assistant, voiced by Yuka Nukui.
- Zisye, Nachzehrer and Amy, voiced by Yuki Sakakihara, Yūki Shin and Yōko Hikasa.
Release Date and Where to Watch
The anime premiered on January 6, 2026 on NTV, with later airings on BS NTV and AT-X. It ran for 12 episodes through March 2026. Crunchyroll streams it outside Japan. The opening theme, “Q.E.D.,” is by Sou, and the ending, “Ningyō no Machi,” is by Watashi Kobayashi.
Who Is Behind It?
Silver Link animated the series. Keisuke Inoue directs and co-writes the series composition with Murasaki, the original game’s writer. Akiko Satō designs the characters and serves as chief animation director, and Yoshiaki Fujisawa composes the music. Harutarō created the original character designs.
The Game and Manga Behind It
The story began as a Gothic horror mystery adventure game by Harumurasaki, originally published by Game Magazine in 2017. Kadokawa has published a manga adaptation illustrated by Soraho Ina in Monthly Comic Gene since 2018. The coverage reviewed does not mention a second anime season, so check official channels for news.
Sources: Anime News Network, Wikipedia, IMDb News, Final Weapon.