Ancient guns vs. modern guns, a desperate battle - the world was devastated by nuclear war, and the era after that -. Under the absolute rule of the World Empire, people are all controlled and live in a world where their freedom has been taken away. However, when all use of force is prohibited, there is a resistance movement that continues to fight secretly to break the dictatorship of the World Empire. They challenge with "ancient guns" left as works of art. And the "noble musketeers" who appear as if in response to their souls. The "absolute nobility" they possess as they fight noble and gorgeously brings a ray of hope to the world -! The daily life of the young noble musketeers who have been given life and shine with vitality. The story of these beautiful young people who laugh, cry, rejoice, are confused, and sometimes get hurt, but still fight in pursuit of their own "absolute nobility". What are we fighting for, and what should we protect - Be Noble!