Hidden in the Abyss and Wandering in the Clouds

When guns replaced fists, feet and swords, martial arts became an antique hidden in the dust of history. People would admire it, admire it, study it, and remember it, but they would not use it. But in the mountains and fields that people in that world ignore, martial arts is still being passed down. Where it is, it belongs to the world. Even if no one knows it anymore, it will protect the world in its own way!