Kaede Shirokuma is a former detective, working as a new inspector from the 6th Inspection Division (commonly known as Dairoku) of the Japan Fair Trade Commission. Tsutomu Koshobu, on the other hand, is an elite inspector from Dairoku, who passed the bar examination at age 20 and graduated as the top of his class at the University of Tokyo. As the inspectors of Dairoku, Kaeda and Tsutomu work hard as "keepers of competitions" by ensuring a free and fair competition in businesses and cracking down on violations relating to the The Antimonopoly Act.
