No Matter How Many Lives

Nezuko's box is sent flying during the explosion, but uses her Blood Demon Art to fall safely. Following the explosion, Tanjiro realizes he no longer is withstanding the effects of Gyutaro's poison, and asks himself why is he still alive. She reunites with Nezuko, overjoyed that she is still alive. He finds Zenitsu, back in his cowardly state as he has awakened, who guides him to a dying Inosuke. Nezuko uses a new healing Blood Demon Art on Inosuke, that ignites the poison in his body away, saving him. They find Tengen at the verge of death, surrounded by his wives, and Nezuko similarly saves him. Unable to move, Tanjiro asks Nezuko to carry him, where they go looking for the demon siblings' heads. They find them, arguing with each other over whose fault their defeat is, and insulting their relationship. As Tanjiro intervenes and comforts the demons, Gyutaro remembers his past life as a human. Born in the poorest slum of the entertainment district, his extreme ugliness meant he had a dire childhood, being treated by a monster by everyone. Unloved by anyone, things seemed to change when his sister Daki, whose real name was Ume, was born. Thanks to her beauty, Gyutaro began living a better life. However, as Ume turned 13, she brutally attacked a samurai with a hairpin, and was burned and left to die in retaliation. Finding her in a pit, Gyutaro is similarly attacked from behind, and left for dead, much to the perpetrators' delight. However, he survived, and murdered both of his assailants with a sickle, and as it started to snow, they are found by Douma, then the Upper Six demon. He offers them to become demons, and to eventually escalate to become Upper Ranks one day. Back in the present, Daki finishes disintegrating, dying in a rage of agony. Gyutaro meets with her in the passageway to Hell where they finally reconcile, and promise each other to be together for the rest of time. Gyutaro finishes disintegrating, and Tanjiro wonders if they managed to ammend their brotherhood. Obanai Iguro, the Snake Hashira, arrives and congratulates Tengen on the accomplishment of defeating an Upper Rank demon. However, Tengen remains steady on his desire to retire, and informs Obanai that Tanjiro is near his full potential, and is a good candidate to take over his spot. Back in the Demon Slayer Corps headquarters, an increasingly ill Kagaya is overjoyed at the news, and expresses his proudness in the three young Demon Slayers, noting that the feat of defeating Muzan is not too far away. Meanwhile, Akaza is summoned at the Infinity Castle, and realizes one of his fellow Upper Ranks has been defeated. Tanjiro reunites and emotionally embraces with Zenitsu and Inosuke, happy to be alive, amongst the ruins of the entertainment district.