Together Forever

This installment, the tenth of the anime, adapts events from the manga and shares its name with chapter nineteen. It wraps the Asakusa storyline by finishing Tanjiro's duel with Yahaba and resolving the standoff with the Temari Demon, Susamaru. The hour also deepens the bond between the Kamado siblings and the demon doctor Tamayo, and it closes with the comic introduction of a yellow-clad swordsman badgering a stranger to marry him.

Having already beheaded Yahaba, Tanjiro survives a frantic barrage of guided arrows by chaining together one Water Breathing form after another until the dying demon disintegrates into ash. Drained and unable to grip his blade, he bites down on it and drags himself toward the others. Susamaru keeps hurling her temari, but Nezuko deflects them, shields Yushiro, and trades blows that grow stronger each round, a sign her power is rising on its own without feeding. Tamayo then steps between them and provokes Susamaru into speaking Muzan's surname, which triggers the buried curse. Demonic arms erupt from the Temari Demon's body and tear her apart. Tamayo explains that Muzan's cells, planted in every demon, are the one thing capable of destroying a demon from within, and that neither Susamaru nor Yahaba bore a Twelve Kizuki numeral.

Adaptation details

The episode draws on chapters eighteen and nineteen and takes its title from the latter. Its first eyecatcher reworks the cover of chapter sixteen, while the second reimagines the cover of chapter nineteen.

Differences from the manga

The exact wording Susamaru blurts out to spring the curse is phrased a little differently between the two versions. The transformed Asakusa man and his wife, who appear in the basement in the manga, are absent from the anime entirely. After dawn, Tamayo asks to take Nezuko into hiding, and a thankful embrace from the girl moves the normally guarded doctor to tears before the group parts ways.