Feeg possesses the ability “Skill Maintenance” (Skill Mente), which allows him to fix and adjust flaws in the skills that people possess. He works as a “Skill Mechanic” in the Hero’s party. However, because his ability isn’t useful in direct combat, he is one-sidedly kicked out of the Hero’s party. With nowhere left to go, Feeg begins heading back to his hometown. On the way, he encounters a mysterious girl named Lilia. After performing Skill Maintenance on her, he gains a new ability called “Modification” (Remodeling)—a power that can dramatically enhance skills. Using this strengthened ability, Feeg begins maintaining and upgrading not only his own skills but also the abilities of others, steadily unlocking new potential and regaining hope for the future.