The Heavens Beginning with Gun Fighting

A martial arts master who is worth a thousand people, who carries a huge strength and is invincible in the world with just one person and one drink? The eternal sword immortal opened the sky with one sword, and Xiaoyao Zi lived forever with one sword? Superheroes show their special powers to protect the city? A magician with a superior status can destroy a country with one method? … When an era begins to be romanticized, it means they have retired! "In that case, isn't it my turn next?" Luke, who was holding a gun, pointed at the group of old antiques in front of him and smiled evilly. One man and one gun, walking through the heavens! (The worlds to be written about include: League of Assassins, JOJO's Bizarre Adventure, Bleach, One Piece, Naruto, Demon Slayer, Genshin Impact, Arknights...)