Detective School Q or Tantei Gakuen Q is a 22 volume manga by Seimaru Amagi that ran from 2001 to 2005. It was adapted into television in 2003, albeit incompletely, spanning a mere forty-five episodes covering only the beginning of the manga, leaving out most of the plot. Later, the series was also adapted into a live action drama.This story involves a group of students called the Q class of Dan Detective School, founded by Retired Badass Detective Morihiko Dan, the best detective in Japan. These students, led by Kyū Renjō, form a Five-Man Band and are task to solve seemingly unsolvable mysteries, as well as to battle a criminal organization led by Pluto who had a past with Morihiko Dan and a mysterious connection with one of the students...Now has a character sheet that could really use some love.
Becoming the Mask — Ryu was supposed to be The Mole, but he fell in love with Kyuu grew fond of Kyuu, Megu, Kazuma and Kinta for real. as time passed.
Break the Cutie — More than once case is a painful, slow, tear-jerking breaking process for either victims, Sympathetic Murderers or witnesses, the top examples being Miyo Fuuma, the three Ichinose siblings, Kuniko Tooya, Mitsuru Hoshou and both her boyfriend and her half-sister Arisa, Midori Tachikawa, and Yuri Hitsuji. And in-story, Ryu gets progressively broken as he develops more.
Brown Note — The "Banquet of Evil" violin solo drives a violinist into increasing insanity as soon as he hears it, and it's mentioned that a mysterious person is forcing three other people to hear it as well through cellphone calls. The reason? It was the favorite musical piece of a brilliant player who was handicapped and killed herself... after an horrible trap staged by the other four (it was actually three because her boyfriend has never considered that this could lead to tragedy). Who end up murderedby the girl's fellow violinist and boyfriend. And had he not done it, they would've died at the hands of the girl's half-sister.
Faking the Dead — The businesswoman Hanayo Ichinose tried this to save her enterprise. She got plastic surgery and returned under a disguise to stop her Smug Snake sister's machinations and check on her three children... and ended up dead because the two eldest didn't recognize her and thought she was the Smugsnake's accomplice, so they killed her to protect their baby sister.
Hot Springs Episode — Two murders happen in onsens. Only one of these mini-arcs has fanservice, as Kyuu and Kinta first fail to get Ryu naked in the springs and then try to peep on a Sexy Secretary bathing on the other side... and end up beaten by Megu, whom they get to see in the nude. The incident is actually plot-relevant, as it drops hints about the murderer - said Sexy Secretary.
It's Not You, It's My Enemies Satoru had to leave Kyuu and his mom when he started investigating Meiousei/Pluto, only watching them from a distance. The single time he attempted to approach little Kyu directly, he was kidnapped by Meiousei, and Satoru went all Papa Wolf on them and singlehandedly got his kid back. Few later, though, he was killed.
Manchurian Agent - Pluto does this all the time to its clients and its own agents as a failsafe. On the trigger, they'll kill witnesses, or themselves, or go insane... it's not pretty.
Also applied on several culprits, courtesy of Meiuosei itself. Basically, they give you the means to carry your revenge and keep an agent close as a monitor, but when said revenge is foiled, they force you to either kill yourself or murder the person who blows your cover. And if a Meiousei agent is captured by the police, another will activate some sort of Mind Control that will make them kill themselves as well.
Smug Snake — Many culprits, but specially Sachiyo Ichinose.
Team Dad — Morihiko Dan, and Tatsumi Hongou is a sterner version. Nanami counts more as Big Brother Mentor due to his closer approach.
Title of the Dead - Episode 22 "Dinner of the Dead", that deals with the murder of a food connoisseur.
Tsundere — The Type B Megu is all sweet and light and gentleness, until Kyuu comments on her panties or flirts with other girls. Yukihira is a Type A, quite more competitive and tsuntsun.
Wounded Gazelle Gambit — Midori Tachikawa, Kazuma's favorite teacher at his elementary school, did this to get money from life insurance. Which wasn't even for herself, but for her seriously ill baby's treatment. Kazuma unmasks her, but also makes sure she gets a lighter sentence and the money she needs for her child.