Tinto is an adventurer boy who can't level up no matter how hard he tries. Called the "Divine Enemy", he is finally expelled from the party he belongs to, but the goddess Esther appears before him. According to Estelle, her mistake kept Tinto at level 0 because she didn't get any experience points. As an apology, Tinto is given 100 times the experience points that he should have gained, and overnight he becomes the strongest adventurer!