Traveling Through the Demon Slayer World and Integrating Breathing Techniques

When Ye Chen opened his eyes, he found that he was in the Taisho era when humans and ghosts were confronting each other. Tanjiro's tragedy had not yet happened, and the Butterfly sisters had not yet experienced life and death. Facing this crisis-ridden world, he acquired a unique fusion system - not only can he learn various breathing techniques, but he can also fuse and sublimate them! The intertwining of water and thunder creates the breath of thunder and water, which is as continuous as heavy rain and as fast as thunder. Fire and wind dance together, creating the breath of Lanyan, and a storm that burns everything sweeps across the battlefield. When the five major breathing methods are perfectly integrated, the most powerful secret that surpasses the breathing of the sun - the breathing of the sun and the moon is born! He wants to change those destined tragedies, protect the butterfly Kanae from dying, and let the flame of Anjuro in purgatory never go out. He wants to stand in front of Onimusuji Muzan and use the power of fusion to end the thousand-year reign of terror. This time, there are no regrets. This time, he will use his own way to bring a real dawn to the world!