Once a legendary detective, Nagumo Keiichiro now stumbles through middle age before he is disrupted by Mashiro, a bold high school girl who demands to become his apprentice.
EPISODE 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.
EPISODE 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; Nagumo is suspected of underwear theft.
EPISODE 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.
EPISODE 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.
EPISODE 5
Welcome to the World of Grown-ups / A Midsummer Thriller / Mashiro and the Agent from the Stars
Junichi Suwabe
Kana Hanazawa
Tomohiro Yamaguchi
Aya Hirano
Kengo Kawanishi
Fairouz Ai
Rion Kujo
Rintaro Ikeda
