Tantei Gakuen Q

Kyuu, a mystery otaku, stumbles into a supposed suicide and after solving the case almost single handedly, he is told about Dan's Detective School.

Kyuu, Megu, and Kinta enter the Entrance exam. Kazuma is introduced.

Using deductions and clues Kyuu, Megumi, Kinta and Kazuma reach the venue for the written exam.

Bent on revenge for failing the entrance exam, someone is threatening the school with three bombs.

A murder takes place where the only clue is a coded dying message written on the computer

A murder takes place and one of the suspects, a stage actress, has about 1000 witnesses who watched her performance when the murder took place.

Another dying message case involving a 5000 piece solid white puzzle that only Megu can solve thanks to her photographic memory.

Q and A classes go to a field trip to Kirisaki Island only to find out that the island is haunted by a string of murders committed by a Jack the Ripper wannabe.

The classes are trapped there by a storm as the Jack the Ripper wannabe has started to murder the students one by one with Sabouramaru being the first victim.

Two students are dead. Ryu solves the mystery of the double locked door room. One more student dies at the end. All the victims have been Class A members.

Kyuu and Ryu solve the case and find the victim. But some secret lies in the name class Q that nobody knows.

Kyuu's friend, Kaoru Ichinose, comes to seek help when a fortune teller mysteriously appears with a letter from her mother who died in a plane crash.

The fortune teller's mystery stays unsolved and murders take place.

The case is finally solved, but the bitter truth about the fortune teller is revealed.

Class Q is on Vacation and a person is found missing, so Class Q decides to help them find the missing person

Class A promises to defeat Class Q in the upcoming exams and replace the members of class Q and so Dan-sensei tells them to have the test at that moment. They are given the diorama of the murder and are supposed to solve it.

Class Q is sent to solve the mysterious murder of the student and other murders that have taken place in Kamikakushi Village

A murder has taken place and they believe that the gods of their village are responsible.

The secret behind one of the murders is understood, but then another is killed.

Kyuu eventually deduces the murderer's identity and uncover the dark past of the village.

The murders of Kamikakushi village are solved. However, the murderer isn't going to give up easily as the former has one more trick in case of emergency...

Class Q are on a trip until they encounter another murder case. A famous chef has been found dead sitting at the table ladened with a full course meal. With four people who all found the body at the same time as suspects, will the Q class be able to solve the mystery.

Kyuu and Kinta are on their way to a fishing trip. Traveling in a train, they meet a famous story writer but they're unaware that she's just in a murder attempt.

Kyuu gets interested in one of the cases sent to DDS, about a mysterious death of an idol, and uses his vacation time to investigate. Once there, he unexpectedly stumble upon Sakurako Yukihira of the A-class, who challenges him to deductive duel in this case.

Yukihara is kidnapped by an unknown assailant forcing Kyuu to find her. With the appearance of the rest of Class Q, they save Yukihara and help to solve the case of the idol's curse. In the end, there are hints of a sinister organization that begins to surface from the shadows....

Megu, prompted by her sister, invites her classmates to her house for dinner though she actually wants to see her 'two princes.' However, it seems like someone has broken into her house-- but is it more than a simple break-in?

A new teacher, Tatsumi Hongōu, is assigned to teach class Q. While cleaning their building in place of Kinta, Megu and Kyuu discover a hidden door, and go exploring.

Kinta, Ryuu and Kazuma realize that Megu and Kyuu have gone missing, and start a desperate search in DDS for them.

Meg and Ryu are sent to an elite school to find out about the mysterious disappearances and also about the one who calls himself "the Collector", who puts videos of the murders of students on the net.

Meg is kidnapped, a student is killed, and the recording of the video is on the net.

The mystery is solved and the secrets are understood.

Megu, Yukihara, and the newcomer Kuniko Touya are sent to help Kyuu and Kinta after they're mistaken as peepers during on their case, but the three girls stumble upon another case.

Kazuma's elementary school is missing a 'cursed' blow dart and a sample of curare. A teacher is shot by a blowdart from a sealed room

With everyone's help, Kazuma discovers the perpetrator's identity and decides to confront the latter...

A madman has been planting bombs in three buildings. He claims that he can talk to the God of gems. DDS set out their move and manages to find the man, but he has already planted the fourth bomb. Kyuu and his friends figure out where the bomb was planted, but they were unable to find it. With only 5 minutes remaining until the bomb explodes, will Classs Q find the bomb in time before it explodes?

Class Q are sent to investigate the threat sent to a violin teacher. But as soon as they arrive, a murder takes place.

A second murder has Ryu looking like a suspect. Will the serial killer ever be found?

The murderer has been revealed and the secrets come to the light. However, even after the truth has been said, there will be one more tragedy of the night...

Kinta takes Ryu to the hospital after the failed murder attempt on Kyuu by a PLUTO agent.

Ryu, Kyuu, and Kyuu's mother go to the third street where The Headless Woman wanders, can they find the truth or face their death...

Dan-sensei visits his best friend and comrade, Satoru Renjo, Kyuu's father. On their way back guys with rifles came and get him. The culprits called a ransom on the appointed time or else the bomb will go out. Will the detectives be able to rescue Dan-sensei or give into the culprits' demands?

The battle of DDS and Pluto have finally come, will Ryu escape his destined fate and will Kyu find out his past? The final battle had come to an end. There's only ONE answer!!