Thanks to his infinite mana Ishua has been working as a mana porter to the hero party. Doing a perfect task of supplying mana to the party members who consumed a lof of MP and earning the trust of his companions. However, Alan, the hero decides to banish him from the party in a fit of jealousy. "We don't need a mana porter!"And chasing after Ishua through the forest Aria, the saint, appears wishing to continue adventuring with Ishua. The story of the banished strongest mana porter begins here!