Demon Slayer: Kimetsu No Yaiba and Pirate Rhapsody

"The monsters in this world... Can't be killed with fists?" Luffy stared at the demon that was shattered by the rubber fist but regenerated instantly, lost in thought. "You need this special knife to cut off the neck." Tanjiro handed over the Nichirin sword, but the moment he saw Luffy holding the sword—— The blade ignites fire, and the rubber body resonates with the breath of fire! Zoro: The swordsmanship in this world... Is called the Breathing Technique? Interesting! (Three Swordsman Style × Breath of Wind = Armed Nichirin Sword, Winding Oni: Where is my rebirth?!) Sanji: It is my bounden duty to protect the lady, please rest assured, Miss Nezuko! (Kicking skills × breath of fire + anti-ghost potion = all-round male god) When the pirate's dominance meets the Demon Slayer's breathing method, When the space boss Ye Luo tried to use the fragments to resurrect Wu Ke, Luffy entrusts the straw hat to Tanjiro: "This is proof of freedom. Next time we meet, you must be stronger!"