Yuri Kitayama 
Seirei Gensouki: Spirit Chronicles (Manga) Volume 11 [EPUB ebook] 

After successfully rescuing Professor Celia, Rio tells her about his memories from a past life in another world—the same world that the heroes he’s seeking are from—and she agrees to join him on his quest. But while the pair are bringing each other up to speed on their lives and their knowledge of current affairs, the people pulling the strings in the Strahl region waste no time capitalizing on the Arbors’ humiliation…and in the Spirit Village, the girls from Japan begin to make some startling realizations. What will become of Rio and his companions as his past life continues to color more of his relationships and as it becomes ever more deeply entwined in regional power struggles?