A Japanese salaryman is hit by a truck and reincarnated as a baby in a world filled with magic. He is taken in by the wizard Merlin Wolford who names him Shin and raises him as his grandson. As Shin grows he is taught magic by Merlin, magical item craftsmanship by Merlin’s friend Melida and swordplay by the warrior Michael. At age 10 Shin successfully slays a demon so Merlin tells him about finding him in the forest, but Shin already knew this as he has memories from his previous life...