Ryoma Mikoshiba prepares to open a new destiny for the Kingdom of Rhoadseria!

The Kingdom of Rhoadseria's inner turmoil grows all the more intense. Ryoma Mikoshiba, a high-schooler summoned to another world from modern day Japan, begins gathering forces for Princess Lupis, heir of the Rhoadserian throne. Lupis's camp gathers powerful warriors, like the mercenary woman Lione the Crimson Lion, but they're still at a vast numerical disadvantage.

But Ryoma marches into the battlefield, ready to decide the critical battle with strategies that would guarantee his victory...