[Sabitsuita Ken] wo Tameshi ni Kyoukashite Mitara, Tondemonai Maken ni Bakemashita

At age 12, individuals are given a Mystic Arms by God. Rust, who aspires to be a hero, hopes for a strong one. As others in his village receive high-ranking Mystic Arms, he grows anxious and prays for one himself. In response, he is given a Mystic Arms of the lowest rank, a Rusty Sword. The story follows Rust, the weakest boy, and his lowly weapon on their journey to becoming heroes.