Invaders of the Rokujouma!? Volume 8.5

With the civil war now in full swing, Alaia and her allies mount a resistance to try and retake their beloved country. History seems to be unfolding all according to the legend, except for one major problem. The Blue Knight is still missing. In his stead, Koutarou and Clan find themselves in the center the chaos, trying to keep history from going too far off the rails so they can eventually get back home to their own place and time. Will they be able to save Forthorthe and themselves?
The 10th book in the Invaders of the Rokujouma!? series!