Twelve Zodiac Duel Noir Challenge

Twelve Duel Noir Zodiac Challenge also known simply as Twelve Duel Noir Challenge are 12 Duel Noir cases featured in the third, fourth and fifth volume of Danganronpa Kirigiri.

The participants of the Twelve Zodiac Duel Noir Challenge are members of the Detective Library, with Tōkichirō Endō once again acting as the host and Gekka Ryuzōji acting as one of the observers.

Danganronpa Kirigiri
The Twelve Zodiac Duel Noir Challenge is a Duel Noir which consists on 12 unique Black Letters sent to Yui Samidare upon unsealing all the letters and pulling out the black papers enclosed. The Black Letters all link to a different location all with different prices:

All together, the Black Letters formed the Twelve Zodiac Duel Noir Challenge that must be solved whitin a week on Twelve locked murder cases. All together, Yui and Kyoko would have to travel to at least eleven separate locations to solve all Duel Noir cases.

The Goodbye Bar Duel Noir
The Goodbye Bar Duel Noir (BAR「グッドバイ」) is one of the many Duel Noir cases featured during the Twelve Zodiac Duel Noir Challenge. Hajiki Yaki was the detective in charge of this case and the criminal being Arai Gunzou, the bar's manager. In the way of the Duel Noir, Katsumi Kodama was asking for help just outside of the Goodbye Bar. Hajiki enters the Goodbye Bar using the key that Arai gave them along with her parthner, Ooba Ryou to rescue him.

Katsumi however is stabbed in the back by someone and dies in the process. Suddendly, the bar goes empty and became a closed room much like the other Twelve Duel Noir cases. Hajiki chases after thinking that the criminal must have escaped from the back door. As the case procceded, Hajiki meets with Lico who suddendly appeared at the Goodbye Bar and advises Hajiki to not go any further but without hearing it only for him to rush down the dark streets chasing the criminal revealed to be one of their own allies, Sachi Mizuiyama.

Museum of Medieval Torture Duel Noir
The Museum of Medieval Torture Duel Noir (中世西欧拷問器具博物館) is one of the many Duel Noir cases featured during the Twelve Zodiac Duel Noir Challenge. Sachi Mizuiyama was the detective in charge of this case and the criminal being Karasuba Kariyasu. Unlike the other Duel Noir cases, when Sachi went to investigate the Museum the police had already searched the crime scenes. On the nvestiigation, Sachi had discovered the murder didn't took place at the museum itself, insted it took place at a prefabricated hut located from the museum through a large courtyard. The victim was a university professor, Idogaki Fukuju. Sachi was forced to leave ot the crime scene to the polic as it was possible to see a headless Iron Maiden standing in the center of the courtyard between the museum and the hut. Which was writen down by Sachi to later use it as a key during the investigation.

Later, Sachi investigates one of Idogaki's seminar students since he was also a victim of that crime scene. During the investigation, they discovered the culprit was Karasuba who was the boyfriend of the researcher who apparently had a grudge against them. Convinced. Sachi headed to the crime scene when the police disappeared and sneak to the museum to get proof. Inside the museum she found five neckless Western armors at the crime scene.

Twin Abilities Research Center Duel Noir
The Twin Abilities Research Center Duel Noir (双生児能力開発研究所) is one of the many Duel Noir cases featured during the Twelve Zodiac Duel Noir Challenge. Kyoko Kirigiri was the detective in charge of this case and the criminal being Touya Tsutsumi. After Touya was left abandoned and the car got dived to a cliff was when the crisis began. Touya decides to take Kyoko as a hostage in exchange for Yui's surrender.

Kareobana Academy Duel Noir
The Kareobana Academy Duel Noir (枯尾花学園) is one of the many Duel Noir cases featured during the Twelve Zodiac Duel Noir Challenge. Salvador Fukuro Yadorigi was the detective in charge of this case and the criminal being Tōru Uchida.

Participants
Being the largest Duel Noir case featured in Danganronpa Kirigiri, for the rest of the participants see the Participants page.

Results and Aftermath

 * Finishing the 12 Duel Noir cases along with Licorne, Salvador Fukuro Yadorigi and Hajiki Yaki, Yui and Kyoko get promoted once again by the Detective Library as they reach the truth behind the other Duel Noir cases as they keep coming.