The manga centers on the actions of a mysterious "fixer" who sits at the top of the black-market underworld of Shibuya's Kabukichō district. [ANN]

For some reason, there are many incidents around Kirigamine Ryo, the deputy director of the detective department at Koigakubo Gakuen High School. The thief who disappeared from the school building, the relationship between the classmate and the poisoned coffee clan, the UFO turmoil of out-of-school learning-Ryo is enthusiastic about solving it, but the gag is just clear and the reasoning is developing. Is it the deputy director of the detective department who will show off the good reasoning? What is the end of the humor school reasoning?