Ryoma Mikoshiba prepares for a rebellion. It's not long until his actions sow chaos across the Kingdom of Rhoadseria. The nobles start turning their backs on Queen Lupis, and the kingdom begins to split into factions. As the rebellion unfolds, it begins to have a dangerous effect on the surrounding countries as well.

It's then that Ryoma hears the whisper of Kikoku—his enchanted blade, which has yet to show its true potential...