The official website for the television anime adaptation of Nigojuu's Tantei wa Mou, Shindeiru. (The Detective Is Already Dead) revealed additional cast, new staff, the theme songs and third promotional video for the second season on Friday. The anime series is scheduled to premiere on October 7 at 9.30 p.m. on AT-X, followed by Tokyo MX, and BS Nippon Television.

Voice actors Akari Komiyama and Nobuhiko Okamoto (Sousou no Frieren) are joining the cast as Mia Whitlock and Scarlet, respectively.

Staff
Director: Manabu Kurihara (Medalist chief animation director)
Series Composition: Deko Akao (Noragami)
Character Design: Yousuke Itou (Kawaikereba Hentai demo Suki ni Natte Kuremasu ka?)
Art Director, Background Art: Haruka Miyata (Medalist 2nd Season) NEW
Color Design: Eiko Nishi (Tokyo Ghoul:re)
CG Director: Shouta Tsukuda (Granblue Fantasy The Animation CG assistant) NEW
CGI Producer: Satoshi Iijima NEW
Director of Photography: Ayumi Itakura (Majo no Tabitabi) NEW, Yuusuke Yamamoto (Uzaki-chan wa Asobitai! Double) NEW
Offline Editing: Masato Yoshitake (Shingeki no Kyojin: The Final Season) NEW
Animation Producer: Yuutarou Hoshino (Unnamed Memory) NEW, Yuuichi Yasuda (Unnamed Memory Act.2) NEW
Sound Director: Nobuyuki Abe (Kemono Friends) NEW
Music: Yuuyu (Shiyan Pin Jiating), 40mP (Blue Archive the Animation) NEW
Studio: ENGI

Note: The staff denoted with the legend NEW are new in their respective roles.

Singer Koume is performing the opening theme "Kono Shinzou ni Hanataba wo". VTuber and illustrator Nana Kagura is performing the ending theme "Hakuchuumu." Both theme songs are previewed in the third promotional video below.

Produced by ENGi, the first season aired in 12 episodes in Summer 2021, roughly adapting the first two volumes. Crunchyroll streamed the anime with subtitles and dubs in multiple languages.

Nigojuu began penning the mystery romance comedy light novel, also known by its short name Tanmoshi, under MF Bunko J imprint in November 2019, featuring illustrations by Umibouzu. Kadokawa published the 13th volume in July 2025, with the 14th volume scheduled for an October 23 release. Tanmoshi has over 1 million copies of its volumes in circulation since July 2022.

Mugiko began drawing a manga adaptation in Comic Alive magazine in May 2020. Kadokawa published the sixth and final volume in October 2023. The manga series covered the first and third volume of the light novel.

A second manga adaptation by Poni, titled Tantei wa Mou, Shindeiru. The Lost Memory began in the same magazine in January 2021. Kadokawa published its fourth and final volume in November 2022. This manga series covered the second volume of the light novel.

A spin-off light novel written by Syusui Tsukimi, with illustrations by Hanekoto (Otonari no Tenshi-sama ni Itsunomanika Dame Ningen ni Sareteita Ken), titled Natsu na Nagisa wa Mada, Mesukousei de Itai. (Nagisa Natsunagi Still Wants to Be a High School Girl) was published by Kadokawa in August 2023. Its second and final was released on February 24. Yen Press licensed the spin-off and published the final volume on February 26.

A second spin-off light novel Charlotte wa Tada, Jiken wo Tokitai. written by Hinachihoko, with illustrations by Minori Chigusa (Watashi no Yuri mo, Eigyou da to Omotta?) was published by Kadokawa in May 2024. A third spin-off light novel Saikawa Yui wa Demo, Aidoru de Iru written by Shao Senlin, with illustrations by Almic (Koi wa Futago de Warikirenai) was published by Kadokawa in August 2024.

Yen Press licensed both the light novel and manga in English in January 2020 and April 2021, respectively. The 12th light novel volume was released on August 11. The sixth manga volume went on sale in December 2024. The company also licensed the spin-off and published the final volume on February 26.

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Source: Comic Natalie