Black Crow Project

This story revolves around the interwar period in the 1920s and 1930s. Due to the First World War, the old colonial system led by Britain and France was in shaky state. The world situation was extremely unstable and various forces were undercurrent. The protagonist of the story, as a U. S. Military veteran of World War I, successfully prevented their supernatural military combat plan that could destroy all mankind, but the remaining villains hid around the world after the war and prepared to make a comeback. In the process of hunting down the enemy, the protagonist also gradually discovers that the whole world and even the entire universe are one of the worlds created by ancient evil gods that existed long before humans; human civilization is so insignificant in front of them.