In autumn of 1937, as the coals of World War II are beginning to smolder, Lieutenant Colonel Yuuki of the Imperial Army secretly establishes a spy training organization called the “D Agency.” Those chose...

In the year 1937 on the eve of World War II, Lieutenant Colonel Yuuki of the Imperial Japanese Army forms the D Agency, an army intelligence outfit under his command and tutelage. Army General Staff attaches...

Long ago, there existed a land divided into four countries: Sou, Kou, Do, and Ah. The King of Ah took on a wife from Kou and soon thereafter one from Do, creating a shaky alliance between the three nations....