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Mashiro's schoolmate seeks the agency's help in catching a ghost, and Nagumo is suspected of underwear theft.
Episodes
1Former Great Detective Nagumo Keiichiro / Mashiro's Pest Extermination 2With Ghosts, Go for the Knees / Find the Real Thief! / Three Minutes Until Mashiro Explodes 3Great Detective Asunaro / The Ones Who Don't Realize They're Stalkers Are the Most Dangerous 4Murder at the Mansion of Screams / Maki-chan and the Generation Gap 5Welcome to the World of Grown-Ups / A Midsummer Thriller / Mashiro and the Agent from the Stars 6Mashiro Hosts Girls' Night Out / Assistant Switch!! / Battle to the Death at 100° Celsius 7Nagumo-san's Grown-Up Allure / The Lost Child and Mashiro / The Great Detective vs. Phantom Thief Riverfake 8Nagumo's Cyber Case File / The Phantom Thief's Method / A Detective Assistant's Day Off 9Take Good Care of Your Smartphone / Maki-chan and Asunaro 10Catch the Sneak Photographer! / The Bullet Bride 11Mashiro and the Psychic of Love 12Nagumo Dons the Haori / Producing Nagumo Detective Agency / Nagumo Detective Agency Shuts Down