Thousands of years in the future, humans who entered space were divided into two countries, the Galactic Empire and the Free Planets Alliance, with two different political systems, "autocracy" and "democracy". The struggle between the two countries lasted for 150 years, with the boundless and vast galaxy as the stage, repeating endless battles. The corruption of the aristocratic society of the Galactic Empire and the group politics known as the "drawbacks of democracy" in the Free Planets Alliance were eroding the two countries. Later, at the end of the 8th century of the Universal Calendar, the appearance of two geniuses drove history. "The ever-victorious genius" Reinhard von Lohengramm, and Yang Wenli, known as the "undefeated magician". The two led the Imperial Army and the Allied Army to engage in an unknown number of conflicts.