Seirei Gensouki: Spirit Chronicles

Haruto Amakawa is a young man who died before he could reunite with his childhood friend who disappeared five years ago. Rio is a boy living in the slums of the Bertram Kingdom who wants revenge on behalf of his mother, who was murdered in front of him when he was five years old. Earth and another world. Two people with completely different backgrounds and values. For some reason, Haruto, who should have died, is resurrected in Rio's body. As the two are confused over their memories and personalities fusing together, Rio (Haruto) decides to live in this new world. Along with Haruto's memories, Rio awakens a "special power," and it seems that if he uses it well, he can live a better life. Complicating matters, Rio suddenly encounters a kidnapping involving the two princesses of the Bertram Kingdom.