The series centers on Yui Yūri, the daughter of a death row convict imprisoned for enacting the "greatest terrorist attack in the Heisei era." At the time, Yui was nine years old, and was judged not to have been involved in her father's activities. Now she is a second-year high school student at Takekura Kosugi High School, where the Japanese prime minister and his security detail are conducting a visit. But a paramilitary force assaults the school and takes the prime minister and the students hostage, without issuing any demands. In the middle of the crisis, Yui tries to find a way to get out.

The story centers on Minemori Kotoha, a woman who has been offered work at Suma Research Company's "Anti-Detective Section," and Sasaki Rena, its only investigator. This section focuses on rooting out corrupt detectives and removing them from their positions. While the two women spend their days investigating crooked cops, a new criminal is beginning to make his move…

Ogasawara Yuuto is a writer for the magazine "Weekly Kadokawa." His current project is an article about mysterious sumo wrestler stickers that have been appearing around the city. With the deadline looming, the appraiser he was depending on to examine the stickers has suddenly quit. A desperate online search finds him Rinda Riko, All-Round Appraiser Q. Possessing a keen eye for details and a vast amount of knowledge, she is an appraiser who can find the truth behind anything! Adapted from the Novel series by Matsuoka Keisuke of the same name. Related Link: [Tokutou Tenjouin α no Nanjiken](https://www.mangaupdates.com/series.html?id=106887) - Spin-Off