Rein is an enchanter whose magic specializes in strengthening equipment. Despite his crucial role, he is suddenly expelled from his guild for an absurd reason: every piece of gear in the guild has already been enhanced to its maximum potential. Outraged by this unfair treatment, Rein decides to reclaim the enormous amount of mana he had poured into the guild's equipment over time.

He channels this accumulated mana into a random, ordinary copper sword. The result is far from ordinary, as the blade transforms into an extraordinarily powerful cheat-level weapon boasting ten thousand enhancement points. Though Rein possesses zero combat experience, he now has the unique ability to turn any item into overpowered gear.

Armed with this power, the laid-off enchanter sets off to begin a new, carefree life as an adventurer. The story takes place in a world where magic and science intertwine, and it follows Rein as he explores his newfound freedom and creates legendary equipment while living on his own terms. The series blends wild humor with layered character drama as the protagonist, who was once considered expendable, discovers that his overlooked support abilities are actually among the most formidable in the world. The manga adaptation of the story has sold over 1.3 million copies, and the anime is produced by studio P.A. Works.