Overview: A Clash of Generations and Mysteries#
Detectives These Days Are Crazy! (known in Japan as Mattaku Saikin no Tantei Tokitara) centers on Keiichiro Nagumo, a man who was once a world-renowned detective capable of solving the impossible. However, a decade has passed, and Nagumo has become a typical middle-aged man who is completely out of touch with the modern world—to the point where he doesn’t even understand what a smartphone is.
The story takes a turn when Mashiro, a high school girl, enters his life wanting to serve as his assistant. This “gender-gap detective duo” creates a dynamic where old-school detective skills meet modern sensibilities. If you enjoy themes revolving around detectives and the comedic friction between different generations, this series is a great fit for you.
If you’re looking to dive into the world of Nagumo and Mashiro, you can buy the manga to see the original art and storytelling.
Is the Anime Really Finished?#
The anime adaptation of Detectives These Days Are Crazy! debuted on July 1, 2025. Because the series is based on a manga that has been serialized since April 2016, there is a substantial amount of source material available.
While the anime provides an entry point into the mysteries, viewers who want a fully satisfying conclusion or the complete story will likely need to continue with the original manga. Since the manga predates the anime by nearly a decade, it remains the definitive version of the story for those who want to know everything.
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Recommended Watch and Read Order#
Depending on whether you prefer a visual introduction or a complete narrative experience, we recommend the following paths. Please refer to the relationship tree below the article for a visual breakdown of these connections.
Release Order#
For those who want to experience the series as it was released to the general public:
- Detectives These Days Are Crazy! (Anime) - Starting from its July 2025 release.
Completionist Order#
For fans who want to consume every piece of available media in the order of original creation:
- Detectives These Days Are Crazy! (Manga) - Start here, as serialization began in April 2016.
- Detectives These Days Are Crazy! (Anime) - Watch the 2025 adaptation to see the characters brought to life.
The “Source Material” Path#
If you don’t mind jumping straight into the written word to ensure you get the full story without waiting for future anime seasons:
- Start and finish with the manga.
Where to Watch and Collect#
- Streaming: You can watch the anime on Prime Video (which collaborates with Crunchyroll in several regions).
- Reading: To get the full story, pick up the manga available through One Peace Books.
- Collectibles: For fans of the duo, you can find official merchandise here.
Whether you are here for the mysteries or the comedy of a detective who can’t use a phone, Detectives These Days Are Crazy! offers a unique take on the detective genre.
Detectives These Days Are Crazy! • manga • 2016-04-27 (serialized in Dengeki Maoh, Jun 2016)
└─(adaptation)→ Detectives These Days Are Crazy! • anime • 2025-07-01
