決戦！乙女たちの戦場3 ～電撃作戦！戦果はエースの名のもとに～

After the end of the second World War, a scientific experiment by the leading post-war nation went terribly wrong, annihilating most of the country. With the world balance suddenly in tatters, countries once again began to fight each other for supremacy. Out of this new war emerged three nations: the Republic of Japan, the Howell Kingdom and the Schwarzwald Empire.

[From Hau~ Omochikaeri!]