Kimetsu no Yaiba: Yuukaku-hen

鬼滅の刃 遊郭編

After visiting the Rengoku residence, Tanjirou and his comrades volunteer for a mission within the Entertainment District, a place where desires are sold and demons dwell. They journey alongside the flashy Sound Hashira, Tengen Uzui, in search of a monstrous foe terrorizing the town. Sworn to slay creatures of the night, the hunt continues.

(Source: Funimation)

Note: The first and final episodes aired with an extended runtime.