Seirei Gensouki: Spirit Chronicles Vol. 1 (Light Novel)

Vol. 1: Kingdom of LiesOrphaned after his mother was killed when he was a child, Rio struggles to survive in the slums of the Beltrum Kingdom. One day, memories of a past life as a university student named Haruto Amakawa awaken in him along with powerful magic abilities, and he realizes he has been reincarnated into a world of swords and magic. After helping solve a case involving a kidnapped princess, he is admitted into the Royal Academy, a prestigious academy for the children of the nobility. A past life and present life intersect, and a boy with two memories confronts his destiny!
Notice: This book is written in Japanese.