The official website for the television anime adaptation of Harumurasaki's Arne no Jikenbo (The Case Book of Arne) game revealed additional cast on Thursday. The anime is scheduled to premiere on January 7, 2026, at 1:29 a.m. on Nippon Television, followed by BS Nippon Television and AT-X.

Cast
Zisye: Yuuki Sakakihara (Dead Mount Death Play)
Nachzehrer: Yuuki Shin (Karasu wa Aruji wo Erabanai)
Amy: Youko Hikasa (Kami no Tou)

Keisuke Inoue (Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta…) is helming the anime at SILVER LINK. Inoue is also in charge of series composition alongside Murasaki. Akiko Satou (Trigun Stampede) serves as the character designer, while Yoshiaki Fujisawa (Spy Kyoushitsu) is composing the music.

Harumurasaki created the mystery vampire game on RPG Maker and released it on the Vaka Game Magazine Website free of charge in November 2017. Arne no Jikenbo was released on Steam in October 2020 in Japanese, Chinese, and English.

Soraho Ina drew a manga adaptation in Comic Gene from November 2018 to March 2022. Media Factory published the fourth and final volume in March 2022.

Source: Comic Natalie