Mattaku Saikin no Tantei to Kitara
ongoing

Detectives These Days Are Crazy!

Author: Igarashi Masakuni
Published: 2016
Demographic: Seinen
Type: Manga
Romance Comedy Adventure Drama Slice of Life Mystery
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Nagumo Keiichirou was a genius high-school detective. No case was complex enough for him. But what happens to genius detectives when they get older? Now 35, with bad hips, running a failing detective agency with no cases to solve and struggling to pay the rent, he's at a dead end. In comes a high school girl in his office who says she wants to work with him. With her help, will the out-of-touch, old-fashioned Nagumo get back the fire of his youth? --- Alt. Official English: [One Peace Books](https://onepeacebooks.com/jt/Tantei.html)
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Chapters (40)

Chapter 35: Mashiro vs. Tasting
Mar 31, 2026
Chapter 34: The Phantom Thief's Method 2
Mar 11, 2026
Chapter 33: Mashiro's Locked-Room Trash Case File (End)
Feb 27, 2026
Chapter 32: Mashiro's Locked-Room Trash Case File (Start)
Feb 21, 2026
Chapter 31: Today's Mashiro is 5-7-5
Feb 04, 2026
Chapter 30.5: Vol. 5 Extras
Jan 27, 2026
Chapter 30: Mashiro's War Inside Her Head
Jan 19, 2026
Chapter 29: Mashiro's Stealth Mission
Jan 17, 2026
Chapter 28: A Detective Assistant's Day Off
Jan 13, 2026
Chapter 27: Detective Nagumo's Cyber Case File (End)
Jan 12, 2026
Chapter 26: Detective Nagumo's Cyber Case File (Start)
Jan 11, 2026
Chapter 25: The solid situation during Mid Summer
Dortex Wife Scans Mar 25, 2025
Chapter 24: Chase The Mystery of Flying Grim Reaper!!
A Bored Loner Aug 13, 2023
Chapter 23: Where did Mashiro's pudding disappear?
A Bored Loner Aug 11, 2023
Chapter 22.5: Vol. 4 Extras
Boredom Society Apr 17, 2022
Chapter 22: Mashiro 3 Minutes Before Explosion
Boredom Society Sep 22, 2021
Chapter 21: Maki-Chan and Asunaro
Boredom Society Jul 10, 2021
Chapter 20: Nagumo's Mature Charm
Boredom Society Jul 08, 2021
Chapter 19
LIDL scans Oct 15, 2020
Chapter 19: Assistant Swap!!
Boredom Society Nov 07, 2020
Chapter 18: Great Detective vs. Phantom Thief River Fake
Boredom Society May 21, 2020
Chapter 17: Lost Child and Mashiro
Boredom Society Mar 12, 2020
Chapter 16: Mashiro Holds a Girls Talk
Boredom Society Mar 04, 2020
Chapter 15: A Capable Detective Talks with Their Eyes
SilverHelios Mar 05, 2019
Chapter 14: Mashiro and the Star Agent
SilverHelios Nov 12, 2018
Chapter 13: Nagumo Becomes a Parent
SilverHelios Jul 08, 2018
Chapter 12: Search for the Real Culprit!!
SilverHelios May 13, 2018
Chapter 11.5: Volume 2 Extras + Omake
SilverHelios Apr 16, 2018
Chapter 11: Mashiro and the Missing One Hundred Million Yen
SilverHelios Apr 15, 2018
Chapter 10: Welcome to the World of Adults
SilverHelios Mar 18, 2018
Chapter 9: Screamer Mansion Murder Case Part 002
SilverHelios Jan 25, 2018
Chapter 8: Screamer Mansion Murder Case
SilverHelios Jan 25, 2018
Chapter 7: Aim for the Knees of Ghosts
SilverHelios Jan 25, 2018
Chapter 6: People Who Aren't Aware They're Stalking Are the Worst
SilverHelios Jan 25, 2018
Chapter 5.5: Volume 1 Extras + Omake
SilverHelios Jan 25, 2018
Chapter 5: Great Detective Asunaro
SilverHelios Jan 25, 2018
Chapter 4: Formerly Fashionable Nagumo
SilverHelios Jan 25, 2018
Chapter 3: Mashiro's Vermin Extermination Case
Underdog Scans Jan 25, 2018
Chapter 2: Ex-Great Detective's Assistant, Mashiro
Underdog Scans Jan 25, 2018
Chapter 1: Ex-Great Detective Nagumo Keiichirou
Underdog Scans Jan 25, 2018

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