Season 1

Former Great Detective Nagumo Keiichiro / Mashiro's Pest Extermination

Jul 1, 2025★ 7.4

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

Jul 8, 202524 min★ 7.6

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

Jul 15, 202524 min★ 7.4

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

Jul 22, 202524 min★ 7.3

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

Jul 29, 202524 min★ 7.1

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

Aug 5, 202524 min★ 7.5

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

Aug 12, 202524 min★ 7.2

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

Aug 19, 202524 min★ 7.1

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

Aug 26, 202524 min★ 7.4

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

Catch the Sneak Photographer! / The Bullet Bride

Sep 2, 202524 min★ 8.0

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

Mashiro and the Psychic of Love

Sep 9, 202524 min★ 7.4

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

Sep 16, 202524 min★ 7.7

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