About Joker Game:. In autumn of 1937, as the coals of World War II are beginning to smolder, Lt. Yuuki of the Imperial Army secretly establishes a spy training organization called the "D Agency." Those chosen as members of the agency, in opposition to the national trend toward reverence of native-born soldiers in the army, are civilian university graduates who pass the superhuman selection test with flying colors. Under the resourceful Lieutenant Colonel Yuuki, they learn not only how to work with gunpowder, wireless communications, vehicles, and airplanes, but also various skills essential for spies..