After a series of lairs filled with Upper Rank Demons, the Ubuyashiki clan is now preparing to eliminate Muzan and his Shitani army once and for all. To defeat this enemy, they have set up a training camp for all their soldiers, run by their top-level warriors, the Hashira. Each Hashira is providing separate and solid training to ensure they become seasoned soldiers.
Amidst all this, Tanjirou Kamado is still recovering from the wounds sustained in his previous lair. While his half-demon sister Nezuko is being researched by great figures, Tanjiro wastes no time in training with every Hashira. He wants to learn everything because he has sworn to destroy Muzan with his own hands.
