Season 112 episodes
1 seasons
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Overview
Once a legendary detective, Nagumo Keiichiro now stumbles through middle age baffled by smartphones and modern life. His quiet decline gets disrupted when Mashiro, a bold high school girl, bursts into his office demanding to become his apprentice. Though he’s rusty and set in his ways, her relentless enthusiasm drags him back into detective work. Now the gap-bridging detective duo is on the case!
Latest season
Episodes
E01
Former Great Detective Nagumo Keiichiro / Mashiro's Pest Extermination2025-07-01
E02
With Ghosts, Go for the Knees / Find the Real Thief! / Three Minutes Until Mashiro Explodes2025-07-08
E03
Great Detective Asunaro / The Ones Who Don't Realize They're Stalkers Are the Most Dangerous2025-07-15
E04
Murder at the Mansion of Screams / Maki-chan and the Generation Gap2025-07-22
E05
Welcome to the World of Grown-Ups / A Midsummer Thriller / Mashiro and the Agent from the Stars2025-07-29
E06
Mashiro Hosts Girls' Night Out / Assistant Switch!! / Battle to the Death at 100° Celsius2025-08-05
E07
Nagumo-san's Grown-Up Allure / The Lost Child and Mashiro / The Great Detective vs. Phantom Thief Riverfake2025-08-12
E08
Nagumo's Cyber Case File / The Phantom Thief's Method / A Detective Assistant's Day Off2025-08-19
People behind the story
Top Billed Cast
Junichi SuwabeKeiichiro Nagumo (voice)
Kana HanazawaMashiro (voice)
Kengo KawanishiTaro Nezu (voice)
Tomokazu SugitaCheerful Old Man / Nipple-Tasting Man / Cross Chest Hair Man / Man Who Likes Ropes (voice)
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