Michio Tsuchida, who lost his life trying to save a girl from a random attacker, woke up to find himself reincarnated in an unknown world. Starting a new life as Cain Sanrose, the son of a nobleman, he undergoes a baptism ceremony on his fifth birthday to receive his Skills. There, he is granted several types of magic, starting with "Earth Magic," along with infinite magical power. This is the story of a young boy who uses his Earth Magic and infinite mana to bring smiles to the people of his fief──.