The ninth instalment of the Boukyaku Tantei Series. The forgetful detective, Okitegami Kyouko, is arrested as a suspect in a robbery-murder case. She was found asleep at the scene, clutching the bloody murder weapon, and had forgotten her memories of the incident. When Kyouko-san offers to investigate the case from inside her cage, she is confronted by Hitaisei, a strong police officer nicknamed "the False Accuser". As he struggles with his pride as a police officer, he chooses to ask for the help of the "forgetful detective expert", Kakushidate Yakusuke...? (Source: Kodansha, translated)

The thirteenth instalment of the Boukyaku Tantei Series. When Kyouko-san's powers of deduction are taken away, her partner, Yakusuke, is on the run! How will she take on the series' greatest enemy? A time limit mystery! "The characters on the ceiling. It was I who wrote them." A young man, Yakusuke, has been deemed a suspect in an attempted murder case. As usual, he asks the forgetful detective, Okitegami Kyouko, to solve the case. However, in the middle of the case, Kyouko-san is shot. She survives but loses her great deduction ability. In pursuit of the culprit, Yakusuke is confronted by someone who knows about the forgetful detective's past... (Source: Kodansha, translated)

The 10th instalment of the Zaregoto Series announced in the 20th-anniversary video for Nisio works. Kunagisa Jun is Ii-chan and Tomo's daughter, an "ordinary" 15-year-old attending Sumiyuri Academy. One day, Aikawa Jun kidnaps her and brings her to the Kunagisa Organization, where she happens upon a grisly murder. (Source: Amazon JP, translated)

A one-shot starring Kumagawa from Medaka Box. The story takes place at Suisou Academy, 2 months prior to Kumagawa's enrollment at Hakoniwa Academy, and shows events leading up to the shutdown of Suisou. *Notes: \- Part one of the "Good Loser Kumagawa" series. \- After premiering in the Winter 2012 issue of Jump NEXT, it was included in Volume 15 of Medaka Box.*

The Final entry in the 'Good Loser Kumagawa' series of Medaka Box side-stories *Notes: \- Final part of the "Good Loser Kumagawa" series. \- After its initial premier in the Summer 2013 Issue of Jump NEXT, it was included in Volume 22 of Medaka Box.*

The second instalment of the Boukyaku Tantei Series. A young man, Oyagiri Mamoru, works as a security guard at a museum. Whenever he visits the area he guards, there's always a beautiful white-haired woman who stops in front of a particular painting. She is Okitegami Kyouko, also known as the Forgetful Detective. They were only supposed to be a guard and spectator until a number of tough cases involving art occurred—. (Source: Kodansha, translated)

The fifth instalment of the Boukyaku Tantei Series. With her resignation letter tucked into her breast pocket, Inspector Hatopa was shaken. Her last case is a drowned body found floating in a park fountain. However, due to its inexplicability, she is forced to investigate in cooperation with the famous forgetful detective, Okitegami Kyouko...... A detective wishing to quit and a workaholic detective. A strange tag team takes on the mystery! (Source: Kodansha, translated)

The Zerozaki Clan is a family of demonic killers, ranked third among the Killing Names. Having just become siblings, Zerozaki Hitoshiki and Mutou Iori attack Aikawa Jun—Humanity's Strongest Contractor—with the best intentions. But, as a result, get caught up in her work! They're headed towards the domain of the second-ranked Killing Names, the Yamaguchi Folks, on the island of Taiyakujima. Therein lies the Lifelong Undefeated Crystal Kaiser, Rikka Kajumaru. (Source: Kodansha, translated)

The Central Realm, a unique world connected to countless other realms through numerous “gates.” Diz, an angel dispatched from Heaven on the Archangel's orders, is having a rough time at work. Then one day, a trouble-making demon named Pasang falls into Diz's life like a meteor! A sweet & deadly, chaotic alliance featuring a selfish angel, a demon, and yet another troublemaker! (Source: Naver, translated)

The eighth instalment of the Boukyaku Tantei Series. "I'll snatch the Eiffel Tower." --Miss Phantom Thief. The forgetful detective, Okitegami Kyouko, is invited to Paris to stop a daring crime threat. However, the thief's true plan is to have Kyouko-san herself steal the Eiffel Tower......?! Stolen memories and a brilliant trap. Can her assistant, Kakushidate Yakusuke, save Kyouko-san from the thief's clutches? (Source: Kodansha, translated)

The sixth instalment of the Boukyaku Tantei Series. The forgetful detective Okitegami Kyouko gives her "first" lecture. A dangerous love question is posed towards Kyouko-san while she's on stage leads to a false accusation, and a young man named Kakushidate Yakusuke receives an unexpected proposal...... Will the beautiful forgetful detective be able to stop the cursed marriage? (Source: Kodansha, translated)