is a Japanese light novel series written by Teniwoha and illustrated by Riichu. It began publication under Media Factory's MF Bunko J imprint in August 2021, with six volumes published as of November 2025. A manga adaptation illustrated by Inaba was serialized from July 2022 to March 2024, with its chapters collected into two volumes between March 2023 and March 2024. An anime television series adaptation produced by Liden Films aired from April to June 2026.
Plot The series follows Sakuya Outsuki, a high school student who works as a detective, aided by his assistant Lilithea. Sakuya has the ability to come back to life after being killed. The series covers Sakuya using his ability and detective skills to solve cases with the help of Lilithea, and their growing relationship.
Characters
A high school student who works as a detective. He is the son of Tatsuya Outsuki, a renowned detective known for solving even the most difficult cases. Like his father, he has the ability to bring himself back to life after being killed. Unlike his father, who is known for being involved in high-stakes investigations, Sakuya prefers more mundane cases. He cares about Lilithea, though he's not fully aware of her feelings.
A 16-year-old girl who serves as Sakuya's assistant, helping him with cases. She's a very beautiful girl with a nice figure, silver hair, and purple eyes. She's quite observant and capable at her job, yet tends to give into temptations to have fun while on the job. She cares deeply for Sakuya, and is quite possessive of him, getting jealous when he interacts with other women.
Media Light novel Written by Teniwoha and illustrated by Riichu, Killed Again, Mr. Detective? is published by Media Factory under their MF Bunko J imprint, with the first volume being released on August 25, 2021. Six volumes have been released as of November 25, 2025.
Manga A manga adaptation illustrated by Inaba was serialized on the Niconico and ComicWalker websites under Fujimi Shobo's Dra Dra Flat brand from July 7, 2022, to March 7, 2024. Its chapters were collected into two volumes between March 9, 2023, and March 8, 2024. The manga is licensed in English by Yen Press.
Anime An anime television series adaptation was announced during MF Bunko J's "Fall School Festival 2025" livestream event on November 16, 2025. It is produced by Liden Films and directed by Takashi Naoya, with scripts written by Mio Inoue, characters designed by Akiko Kumada, and music composed by Shūhei Mutsuki. The series aired from April 3 to June 19, 2026, on TBS and BS11. The opening theme song is , performed by Multidimensional Control Mechanism Yodaka, while the ending theme song is , performed by Shion Wakayama. Crunchyroll is streaming the series.
Episodes
Reception Rebecca Silverman, writing for Anime News Network, reviewed the first volume of the manga. She praised how the manga completed the murder case within a single volume, as well as Sakuya's characterization. However, she questioned Lilithea's characterization, describing her as too robotic and quirky rather than being fleshed out more. She also criticized the supporting character Yuriu as slowing down the pacing. She concluded by saying that while the volume was fun to follow, it was not a must-buy.
See also The Vexations of a Shut-In Vampire Princess, another light novel series illustrated by Riichu
Notes
References
External links Light novel official website Manga official website Anime official website