Season 1 (2025)

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Former Great Detective Nagumo Keiichiro / Mashiro's Pest Extermination
8.2

July 1, 2025

Nagumo Keiichiro was once a great child detective, but age is starting to catch up with him.

With Ghosts, Go for the Knees / Find the Real Thief! / Three Minutes Until Mashiro Explodes
8.4

July 8, 2025 • 24m

Mashiro's schoolmate seeks the agency's help in catching a ghost, and Nagumo is suspected of underwear theft.

Great Detective Asunaro / The Ones Who Don't Realize They're Stalkers Are the Most Dangerous
8.8

July 15, 2025 • 24m

A young detective lockpicks his way into Nagumo's office and asks to work for him.

Murder at the Mansion of Screams / Maki-chan and the Generation Gap
7.0

July 22, 2025 • 24m

Nagumo is invited to a dinner party at a stately old mansion... where a mass murder once took place.

Welcome to the World of Grown-Ups / A Midsummer Thriller / Mashiro and the Agent from the Stars
7.5

July 29, 2025 • 24m

Nagumo takes Mashiro to his favorite bar to give her a taste of grown-up society.

Mashiro Hosts Girls' Night Out / Assistant Switch!! / Battle to the Death at 100° Celsius
7.5

August 5, 2025 • 24m

Mashiro spends an evening with Azuha and Maki. Later, Nagumo and Asunaro switch partners.

Nagumo-san's Grown-Up Allure / The Lost Child and Mashiro / The Great Detective vs. Phantom Thief Riverfake
7.5

August 12, 2025 • 24m

Mashiro brings back a lost little girl... and finds out there's more to her than meets the eye.

Nagumo's Cyber Case File / The Phantom Thief's Method / A Detective Assistant's Day Off
7.5

August 19, 2025 • 24m

The gang tries to sniff out a cyber criminal who's brainwashing people through online videos.

Take Good Care of Your Smartphone / Maki-chan and Asunaro
7.5

August 26, 2025 • 24m

Mashiro loses her smartphone, and Asunaro recounts how he and Maki became partners.

Catch the Sneak Photographer! / The Bullet Bride
7.0

September 2, 2025 • 24m

Nagumo receives a case of someone taking indecent photos of women at a water park.

Mashiro and the Psychic of Love
7.0

September 9, 2025 • 24m

A client asks Nagumo to save his wife from a psychic who seems to have brainwashed his village.

Nagumo Dons the Haori / Producing Nagumo Detective Agency / Nagumo Detective Agency Shuts Down
7.5

September 16, 2025 • 24m

Can the gang make enough money to pay off Nagumo's overdue rent and save Nagumo Detective Agency?