Season 1

1. Former Great Detective Nagumo Keiichiro / Mashiro's Pest Extermination

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

2025-07-01 • ? min

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

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

2025-07-08 • 24 min

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

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

2025-07-15 • 24 min

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

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

2025-07-22 • 24 min

5. Welcome to the World of Grown-ups / A Midsummer Thriller / Mashiro and the Agent from the Stars

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

2025-07-29 • 24 min

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

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

2025-08-05 • 24 min

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

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

2025-08-12 • 24 min

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

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

2025-08-19 • 24 min

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

2025-08-26 • 24 min

10. Episode 10

2025-09-02 • 24 min

11. Episode 11

2025-09-09 • ? min

12. Episode 12

2025-09-16 • ? min