After an unexpected accident in his previous life, Maki is reincarnated into a new world as Leon Unlike other reincarnated heroes, Leon awakens as a new born infant, but with the consciousness and some memories of his former life still intact. He soon realizes that he has been born into a powerful family—his father, Gustav, is a legendary fighter known as Berserker Gustav, and his mother, Stella, is a renowned mage both members of previous hero's party. As Leon struggles to adapt to his new life as a toddler, he discovers an astonishing ability: the power to use magic. This revelation changes everything as he slowly starts practicing in secret, trying to harness his newfound abilities in a body too young and weak to handle such power.