At the height of World War I, a young man was trying to cross from Yokohama Port to Paris. His name is Chosokabe Tenpei. He aspired to become a first-class painter, but when he happened to see a poster recruiting students for the French Air Force Flight School, he decided to become an aviator! Together with his partner, the black eagle, Kurobee, Tenpei, a happy boy, plays an active role as the ace of the French Air Force!