Once a legendary detective, Nagumo Keiichiro now stumbles through middle age baffled by smartphones and modern life. His quiet decline gets disrupted when Mashiro, a bold high school girl, bursts into his office demanding to become his apprentice. Though he’s rusty and set in his ways, her relentless enthusiasm drags him back into detective work. Now the gap-bridging detective duo is on the case!

Junichi Suwabeas Keiichiro Nagumo (voice)
Kana Hanazawaas Mashiro (voice)
Kengo Kawanishias Taro Nezu (voice)
Tomokazu Sugitaas Cheerful Old Man / Nipple-Tasting Man / Cross Chest Hair Man / Man Who Likes Ropes (voice)
Haruna Mikawaas Cafe Staff (voice)
Kozue Saitoas Granny (voice)
Amane Shindoas Mako Hachiya (voice)
Taichi Takedaas Skin (voice)
Taisuke Nakanoas Intellectual (voice)
Shoumaru Zouzaas Takako's Husband / Ken (voice)
Tomoki Kikuya