Born into a family known for producing the strongest exorcists, Shinmoru Mayaya was deemed a failure due to his lack of talent. Labeled incompetent and defective, he was summoned to another world by a god. After four years in this world, he gained immense power, saving it alongside a hero. Returning to his original world with his newfound strength, he finds his journey has only just begun. Now, he will fight as an exorcist.