Pirates: Start by Adding Some Breathing Techniques

As the master of various breathing techniques of Demon Slayer, Kiro is known as the strongest swordsman of the Demon Slayer Corps in the past century. Just after he finally killed Mukai Kibutsuji, he accidentally traveled to the world of pirates and became a civilian about to be bombarded by warships in the O'Hara incident. Fortunately, Goldfinger did not disappear and came into this world with him. Defeat powerful enemies to gain points, which can be used to upgrade skill proficiency or gain stronger skills through deduction. Facing the desperate situation, Kilo didn't care and grinned. "Yonko General Shichibukai? I don't know how many of my swords they can take!" … On top of the war, the roar of [Thunderbolt: Thundergod] resounded in the sky, and the black and red lightning razed the naval headquarters Marinefando to the ground. In the new world, the striped swordsmen are like ghosts and gods, their swords tear through the sky with aura, and the clouds are rolling endlessly. On Dantou Island, the flames of the sun burning the sky and boiling the sea burned wantonly, and the blazing red sword finally cut off all sins. … Many years later. The centuries-old sacred site of Marie Gioia collapsed in the flames of war. Kilo, who has become the world's greatest swordsman, stands in the sky, facing a frightened crowd as if facing a formidable enemy. "Are you crazy? How dare you massacre the noble Celestial Dragons?!" "You are against the whole world!" Kylo laughed loudly. "What a damn evil spirit, actually disguised as a Celestial Dragon! As a former Demon Slayer Swordsman, I can't just ignore it!" "Besides, there's something you've made wrong -" "It's not that I'm against the world, it's that the world is against me!"