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Kimizuka Kimihiko is a crisis-magnet. So it is no surprise when his rather mundane flight suddenly enters a state of emergency with a dire need of a detective onboard. Unfortunately, his attempt at avoiding trouble is foiled by a beautiful girl with silver hair who goes by the codename Siesta. Declaring herself a detective, she unceremoniously drags Kimizuka into the case as her assistant. That incident spelled the beginning of an adventure around the globe that went beyond his wildest imagination. Putting their lives on the line, the two took down criminal organizations, prevented disasters, and saved thousands. But the curtain closed to their epic journey with Siesta's untimely death three years later. Resolving to live an ordinary high school life this time, Kimizuka spends a year maintaining a low profile. However, as fate would have it, a girl with an uncanny resemblance to Siesta comes crashing into his life, threatening to throw his peaceful days into disarray.

Series Cast

  1. Arata Nagai as Kimihiko Kimizuka (voice)

    Arata Nagai

    Kimihiko Kimizuka (voice)

    12 Episodes

  2. Saki Miyashita as Siesta (voice)

    Saki Miyashita

    Siesta (voice)

    12 Episodes

  3. Ayana Taketatsu as Nagisa Natsunagi (voice)

    Ayana Taketatsu

    Nagisa Natsunagi (voice)

    12 Episodes

  4. Kanon Takao as Yui Saikawa (voice)

    Kanon Takao

    Yui Saikawa (voice)

    12 Episodes

  5. Saho Shirasu as Charlotte Arisaka Anderson (voice)

    Saho Shirasu

    Charlotte Arisaka Anderson (voice)

    12 Episodes

  6. Maria Naganawa as Alicia (voice)

    Maria Naganawa

    Alicia (voice)

    12 Episodes

  7. Yoshitsugu Matsuoka as Bat (voice)

    Yoshitsugu Matsuoka

    Bat (voice)

    12 Episodes

  8. Mai Fuchigami as Fuubi Kase (voice)

    Mai Fuchigami

    Fuubi Kase (voice)

    12 Episodes

  9. Takehito Koyasu as Chameleon (voice)

    Takehito Koyasu

    Chameleon (voice)

    12 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 1

2021 • 12 Episodes

Season 1 of The Detective Is Already Dead premiered on July 4, 2021.

Those Dizzying Three Years I Spent with You

(1x12, September 19, 2021) Season Finale

View All Seasons

The Detective Is Already Dead
The Detective Is Already Dead


Original Name 探偵はもう、死んでいる。

Status Returning Series


  • See more TV shows from AT-X...

Type Scripted

Original Language Japanese


Content Score 


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  • Created by credit

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