Detectives These Days Are Crazy! (まったく最近の探偵ときたら) is a Japanese manga series written and illustrated by Masakuni Igarashi.It began serialization in ASCII Media Works' manga magazine Dengeki Maoh in April 2016.An anime television series adaptation produced by Liden Films aired from July to September 2025.
Plot
About 20 years ago, Keiichiro Nagumo was an ace detective in Japan despite being in high school. No case was too tough for him to solve. However, at 35 years old, his age is catching up with him. Nagumo no longer has the youthful energy or fame from his high school days. Suffering from aching hips and back issues, on top of growing increasingly jaded, his private eye office is struggling to attract clients and making it hard to afford rent and food. One day, an excitable high school girl named Mashiro Nakanishi appears at his doorstep and wants to be his apprentice, which he initially refuses. After she helps him finish a case, Nagumo lets her stay as an unpaid apprentice. Mashiro repays him by helping him deal with a wide range of cases from finding lost pets and exterminating bugs to hunting down masked villains and violent gangsters.
A former genius detective as a high school boy, but now a washed up 35-year-old man running a failing private detective agency who struggles with modern technology and cultural references. Even so, he indirectly inspired a newer generation of detectives and assistants with his former exploits.
A bubbly and excitable high school girl who looks up to Nagumo, often uses brute force to complete any task she is given. She can somehow procure any equipment in an instant, from a self-inflating stunt mat to a loaded flamethrower, hidden in her student uniform.
A stray cat that was captured by Nagumo for a client, only to find out the cat was not the same as the client's. Due to the client's refusal to take it with her, Mashiro decided to keep the cat in the office and named it Cerberus.
A low-level Yakuza who quits his job after Mashiro torches his group's office with a flamethrower. He soon joins the Nagumo Detective Agency, running errands for them.
Another fan of Nagumo's younger days who wants to become his apprentice, even though he has his own detective work and adoring female fanbase. Unlike Nagumo, he wears more traditional Japanese clothing. A master of lockpicking and other security tasks that require finesse, he immediately becomes Mashiro's biggest rival.
Asunaro's assistant who seems to just tolerate his antics and his nickname for her of "Maki-chan". She was given the job after not being intimidated like the rest of his fangirls when Asunaro deliberately made himself appear ugly during an audition to be his assistant. Even so, Maki-chan has an inferiority complex about her size and real age.
Azuha Hoshino (星野アズハ)
College dropout and self-proclaimed Star Agent who invents several spy gadgets and custom drugs. Her office is on the floor below that of the Nagumo Detective Agency.
Fuu-chan (風ちゃん)
The daughter of Detective Mimasaka who was inspired by her father's stories on the job, and now dreams of becoming "Phantom Thief Beaver," constantly stealing little items from Nagumo's office to prove her skills and annoying Mashiro with comments about her appearance.
Soya Mimasaka (美馬坂総也)
Nagumo's former classmate. Similar to Nagumo, he was a detective in his high school days who turned 35 years old, and struggles with modern-day technology. Unlike Nagumo, he joined the TMPD after graduation, and now works as a civil servant instead of a private eye. He claims to know Mashiro's "real identity" and the reason behind Nagumo's downfall from fame.
Coach (コーチ)
A large black man whose real name is unknown, but is often featured in Mashiro's flashbacks as having trained her to fight.
Media
Manga
Written and illustrated by Masakuni Igarashi, Detectives These Days Are Crazy! began serialization in ASCII Media Works' manga magazine Dengeki Maoh on April 27, 2016.[5] Its chapters have been compiled into sixteen volumes as of September 2025.The series is licensed by One Peace Books for English publication.[6]
Anime
An anime television series adaptation was announced on August 23, 2024.[26] It was produced by Liden Films and directed by Rion Kujo, with Rintarō Ikeda overseeing series scripts, Isoroku Koga designing the characters and serving as chief animation director, and Tomoki Kikuya composing the music.[27] The series airied from July 1 to September 16, 2025, on AT-X and other networks.[28] The opening theme song is "Suffer", performed by Taiiku Okazaki, while the ending theme song is "GORI☆GORI Feez e-Girl!!", performed by Kana Hanazawa (as Mashiro) and Tomokazu Sugita (as "Jolly Old Men").[29]Crunchyroll is streaming the series.[30]Medialink licensed the series in Southeast Asia and Oceania (except Australia and New Zealand) for streaming on Ani-One Asia's YouTube channel.[31]
Episodes
Episodes
Reception
By August 2024, the series had over 900,000 copies in circulation.[35]
See also
Senryu Girl, another manga series by the same author
