As Tanjiro and his friends continue to fight against Muzan, they realize that they are running out of time. Muzan's power is growing stronger with every passing moment, and they are struggling to keep up. However, just when all hope seems lost, a figure emerges from the shadows.

It is none other than Yoriichi Tsugikuni, the legendary demon slayer who defeated Muzan centuries ago. Yoriichi, who has been watching the battle from afar, decides to join the fight and lends his strength to Tanjiro and the others.

Together, the group launches a fierce attack on Muzan, determined to end his reign of terror once and for all. As they fight, Yoriichi shares his knowledge and experience with Tanjiro, helping him to refine his skills and unleash his true potential.

In a dramatic final showdown, Tanjiro and Muzan face off in a battle that shakes the very foundation of the earth. As the two clash, Muzan unleashes his most powerful attack, a blast of pure demon energy that threatens to consume everything in its path.

But Tanjiro, fueled by his love for his friends and his determination to protect the innocent, channels all of his strength into a single blow. The impact is so powerful that it creates a massive shockwave that shatters the ground beneath them.

When the dust settles, Muzan is defeated, and the demon slayers emerge victorious. Yoriichi, satisfied that his duty has been fulfilled, disappears into the night, leaving Tanjiro and his friends to celebrate their hard-won victory.

In the aftermath, the demon slayers rebuild their organization and work to restore peace to the world. Though they know that there will always be more demons to fight, they also know that as long as they stand together, they can overcome any challenge that comes their way.