Rakuin no Monshou IX Seiya ni Ryu no Doukoku Fukisusabu

is the ninth volume of the Rakuin no Monshou light novel series, written by Tomonori Sugihara and Illustrated by 3. It was released under the Dengeki Bunko Imprint in September 2011.

Synopsis
Orba who returned from the west and revived as "Prince Gil". He reunites with Virina and begins preparing for the fight. Meanwhile, Emperor Ghoul concludes that Gil has returned as a fake and sends his army to Apter. In the overwhelming force difference, Orba, who had to raise the signal of the anti-emperor as a crown prince, devised a plan to win a vivid victory with a soldier. The two armies finally reached a time of clash ──.

(source: Bookwalker JP - Translated)