証明終了, Hepburn: Kyūīdī Shōmei Shūryō) is a Japanese manga series written and illustrated by Motohiro Katou.

The series follow Sou Touma, a university graduate who encounters a variety of investigative cases after returning to Japan from the US.

iff, started in Shōnen Magazine R in January 2015 and was transferred to Getsu Maga Kichi online manga platform in February 2023.

After that, on the first floor of the building where the shooting took place, Kana happens to meet Sou Touma, who recently transferred to another school.

Although he graduated from MIT's mathematics department at the top of his class at the age of 15, for some reason he came to a normal high school in Japan.

[11] Shōnen Magazine R ceased publication on January 20, 2023,[12][13] and the series was transferred to the online manga platform Getsu Maga Kichi on February 14 of the same year.