The upcoming TV anime based on the mystery adventure game The Case Book of Arne revealed a new trailer, key art, the main cast and the official theme song performers for the series today. The series broadcasts in Japan on Nippon TV beginning on January 6, 2026, with additional broadcasts to follow on BS Nippon TV and AT-X. The Case Book of Arne Trailer The main cast for The Case Book of Arne includes: Louis voiced by Mariya Ise Arne voiced by Koki Uchiyama Arne (as a child) voiced by Aimi Tanaka Lynn voiced by Yuka Nukui Louis Arne Arne (child version) Lynn Sou performs the opening theme for the series, which is entitled “Q.E.D.”. watashi kobayashi performs the ending theme for the series, which is entitled “Ningyou no Machi” (“Town of Marionettes”). Originally developed by HARUMURASAKI and published by Vaka Game Magazine in 2017, The Case Book of Arne was also adapted into a manga with artwork by Soraho Ina that was serialized from November 2018 to March 2022 in Media Factory's Monthly Comic Gene magazine. Keisuke Ino directs the TV anime adaptation at animation studio SILVER LINK., with series composition by Murasaki and Keisuke Inoue, original character designs by Harutaro, animation character designs and chief animation direction by Akiko Sato and music by Yoshiaki Fujisawa. The Case Book of Arne key art RELATED: The Case Book of Arne Anime Teaser Trailer Announces January 2026 Premiere Steam distributes an English language version of The Case Book of Arne , and describes the story as follows: 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 The Case Book of Arne TV anime home page
