The Elementalist: Dark Rebound

As the chosen bearer of the Elementalist system, Ruvian dedicated his life to the path of a knight, guided by the Alliance. However, when he lost his life during the war, the Alliance decided to bury his heroic history. They restored peace under a white lie.

A demonic warlock then managed to reanimate Ruvian, merging his soul with a soulless body. However, Ruvian's heart remained true, and he thrived to see the world that had managed to regain its peace.

Until he met a troublesome white-haired girl who constantly gave him headaches....