Season 1 (2025)
7.43 avg 12 episodes 7.4 → 7.7
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Moto Meitantei Nagumo Keiichirô / Mashiro no Gaichû Taiji | 7.4 | 64 |
| 2 | Obake wa Hiza o Nerae / Shin-han'nin o Sagase!! / Mashiro Bakuhatsu San-pun-mae | 7.6 | 56 |
| 3 | Meitantei Asunaro / Sutôkâ no jikaku ga nai yatsu ga ichiban yabai | 7.4 | 45 |
| 4 | Zekkyôkan Satsujin Jiken / Maki-chan to Jenerêshon Gyappu | 7.3 | 46 |
| 5 | Welcome to the World of Grown-ups / A Midsummer Thriller / Mashiro and the Agent from the Stars | 7.1 | 38 |
| 6 | Mashiro Hosts Girls' Night Out / Assistant Switch!! / Battle to the Death at 100° Celsius | 7.5 | 38 |
| 7 | Nagumo-san's Grown-up Allure / The Lost Child and Mashiro / The Great Detective vs. Phantom Thief Riverfake | 7.2 | 34 |
| 8 | Nagumo's Cybercrime Case Files / The Phantom Thief's Tricks / The Assistant's Day off | 7.1 | 30 |
| 9 | Take Good Care of Your Smartphone / Maki-chan and Asunaro | 7.4 | 28 |
| 10 | Catch the Sneak Photographer! / The Bullet Bride | 8.0 | 30 |
| 11 | Mashiro and the Psychic of Love | 7.4 | 25 |
| 12 | Nagumo Dons the Haori / Producing Nagumo Detective Agency / Nagumo Detective Agency Shuts Down | 7.7 | 30 |