© 2026 The Couch Critic
Status
Ended
Release
2025 - 2025
Seasons / Eps
1 / 12
Streaming availability by country
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!
27 Cast Members
Junichi Suwabe
Keiichiro Nagumo (voice)
12 Episodes
Kana Hanazawa
Mashiro (voice)
12 Episodes
Kengo Kawanishi
Taro Nezu (voice)
12 Episodes
Tomokazu Sugita
Cheerful Old Man / Nipple-Tasting Man / Cross Chest Hair Man / Man Who Likes Ropes (voice)
12 Episodes
Saya Horigome
High School Girl on TV (voice)
1 Episodes
Shoumaru Zouza
News Announcer (voice)
1 Episodes
Chado Horii
Cerberus (voice)
2 Episodes
Haruna Mikawa
Cafe Staff (voice)
1 Episodes
Kozue Saito
Granny (voice)
1 Episodes
Amane Shindo
Mako Hachiya (voice)
1 Episodes
Taichi Takeda
Skin (voice)
1 Episodes
Taisuke Nakano
Intellectual (voice)
1 Episodes
Seisuke Fujiwara
Nishino (voice)
1 Episodes
Volcano Ota
Big Brother (voice)
1 Episodes
Takayuki Nakatsukasa
Boss (voice)
1 Episodes
Yuu Hayashi
Hayashida (voice)
1 Episodes
Mitsuhiro Ichiki
Underwear Thief (voice)
1 Episodes
Tsuguo Mogami
Police Officer (voice)
1 Episodes
Yusuke Shirai
Knit Man (voice)
1 Episodes
Tomohiro Yamaguchi
Yuu Asunaru (voice)
1 Episodes
