In 1992, the World War began from the conflict between federations of civilism and republicism. It lasted for 13 years.
50 years after the Great War the Cold War is still pending with occasional skirmishes happening.
Zhengzhou, a marine nation located in the east of the world, pumps up its military while remaining hostile to both factions. Eventually it provokes a large-scale backlash. Inside the country the militarization is spread even to the schools. This story takes place in the oldest preparatory school that has a big number of excellent graduates, but even bigger number of war idiots, so students of this school are often called "war fools"...

[From vndbreview]