Senkou no Boukensha

A man who died in an accident is reborn as Arte, the second son of a noble marquis family in a world where swords and magic exist. He lives a comfortable life with a supportive family. During a ceremony to assign magical abilities, Arte receives a rare and misunderstood power known as "Light." Initially seen as a flawed magic, it triggers his memories from his previous life, revealing its hidden potential. Arte decides to use his past knowledge to develop this magic into something powerful. His journey to master this ability and redefine its strength begins.