Seirei Gensouki: Spirit Chronicles (Manga): Volume 5 by Futago Minaduki

Life in the spirit forest is pleasant for Rio and Latifa-but alas, their time together there isn't meant to last. With a promise that he'll eventually return, Rio departs for his parents' hometown in the Yagumo region. A small village holding the secrets of his birth awaits him.
Binding: Paperback / softback