The Story go back to the year 1939 (new years eve party), Brandenburg. It is the house of familly "von Enschenbach". Protagonist is Heinrich von Eschenbach, 23 years old, soldier like his whole familly. He and his sister Helene learned to know Yakumo. Germany and Japan were allies in WWII. Yakumo is intelligence officer for Japan. Heinrich have to show him the german "Wehrmacht" and everything in Berlin and Brandenburg.
For a story in the 1940th I had to draw many details, buildings, cars, and so on.