Detective Kuroiwa of the Metropolitan Police Department's Fourth Investigation Division and Takigawa, a reporter club cap of the Toyo Shimbun Josai Station, describe a drama full of non-work hidden behind gangster crimes through their appearance. .. Ryosuke Kuroiwa, a detective dispatched from the main office to the 4th Investigation Division of the Josai Station. He is quiet and shy, but he hates crime more than anyone else. His parents are no longer there and he lives with his sister Keiko. Takikawa and Kuroiwa are seniors and juniors in high school, and they have a strong friendship that goes beyond the positions of a newspaper reporter and a detective.