S1 E1 • Kêichirô Nagumo, ancien grand détective / Mashiro, la reine de la désinsectisation

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

Première diffusion : 6 juin 2025

S1 E2 • Avec les fantômes, faut viser les genoux/Trouve le véritable coupable !/Mashiro, trois minutes avant l’explosion

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

Première diffusion : 6 juin 2025

S1 E3 • Asunaro, le grand détective/Mon talent inégalé à votre service !/Il n’y a pas pire qu’un harceleur qui s’ignore

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

Première diffusion : 15 juillet 2025

S1 E4 • L’Affaire du meurtre de la maison hurlante/Maki et le Conflit de générations

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

Première diffusion : 22 juillet 2025

S1 E5 • 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. Source: Crunchyroll

Première diffusion : 29 juillet 2025

S1 E6 • 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. Source: Crunchyroll

Première diffusion : 5 août 2025

S1 E7 • 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. Source: Crunchyroll

Première diffusion : 12 août 2025

S1 E8 • 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. Source: Crunchyroll

Première diffusion : 19 août 2025

S1 E9 • Take Good Care of Your Smartphone / Maki-chan and Asunaro

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

Première diffusion : 26 août 2025

S1 E10 • Catch the Sneak Photographer! / The Bullet Bride

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

Première diffusion : 2 septembre 2025

S1 E11 • Mashiro and the Psychic of Love

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

Première diffusion : 9 septembre 2025

S1 E12 • Nagumo Dons the Haori / Producing Nagumo Detective Agency / Nagumo Detective Agency Shuts Down

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

Première diffusion : 16 septembre 2025