Legend

Legend summary:

Reiji Saeki was living in a north-eastern countryside town and lost his life in an accident during summer vacation. But before he knew it, a mysterious ball of light appeared in front of his eyes in a world of whiteness. Being a magician from a parallel world, that ball of light is looking for someone qualified to inherit the magic they had created in order to prevent it from being lost. Reiji, who took on that suggestion, lives in the parallel world Elgin, with a new body and powerful magic.