A young man who should have died in an accident awakens to find himself reincarnated as Arte, the second son of a prestigious marquis family in a world of swords and magic. Surrounded by a kind and loving family, his new life is smooth and peaceful—until the ceremony to receive one’s magical attribute. There, he is granted a mysterious unique magic called “Light”, which everyone considers a failure attribute. But when his memories from his previous life return, Arte realizes the true, exceptional nature of this magic… Using the knowledge from his past life, he aims to turn this so-called “failure” magic into the strongest magic of all! Thus begins the tale of the man who would one day be known as Flash, and his free, unstoppable adventure!