How a Realist Hero Rebuilt the Kingdom: Volume 9 by Dojyomaru Book Resume:
Souma, who has come to the Union of Eastern Nations to deal with the demon wave, pushes east toward the intense fighting in the Duchy of Chima. Duke Chima has been gathering reinforcements with a promise to reward those who distinguish themselves in battle by presenting them with one of his six capable children, but the battle has reached a stalemate. En route to the Duchy of Chima, Souma meets the king of the nomadic state of Malmkhitan. As they travel together, Souma learns Fuuga is also there to support the Duchy of Chima. But for Fuuga, who is aiming to be the top contributor to the war effort, Souma is an enemy competing with him for one of the six brothers and sisters. When faced with Fuuga's shocking power, how will Souma handle it?! The revolutionary administrative fantasy series, volume nine!