What Is It?
The 2021 Japanese anime (animated) TV show Demon Slayer: Kimetsu No Yaiba (Season 2).
This is how Wikipedia describes this anime:
Demon Slayer: Kimetsu no Yaiba is a Japanese anime series based on the manga series of the same title, written and illustrated by Koyoharu Gotouge. The second season adapts volumes seven to eleven (chapters 55–97) of the manga series and ran in two cours, with the first part titled Demon Slayer: Kimetsu no Yaiba – Mugen Train Arc, a seven-episode recompilation of “Mugen Train” as seen in the 2020 film featuring new music and an all new original episode, which aired from October 10 to November 28, 2021. The second part is titled Demon Slayer: Kimetsu no Yaiba – Entertainment District Arc which aired 11 episodes, from December 5, 2021, to February 13, 2022. The season was directed by Haruo Sotozaki, with character designs by Akira Matsushima, and animation produced by Ufotable; staff and cast from the first season and Demon Slayer: Kimetsu no Yaiba – The Movie: Mugen Train also returned.
This is how MyAnimeList describes this anime TV show:
The devastation of the Mugen Train incident still weighs heavily on the members of the Demon Slayer Corps. Despite being given time to recover, life must go on, as the wicked never sleep: a vicious demon is terrorizing the alluring women of the Yoshiwara Entertainment District. The Sound Pillar, Tengen Uzui, and his three wives are on the case. However, when he soon loses contact with his spouses, Tengen fears the worst and enlists the help of Tanjirou Kamado, Zenitsu Agatsuma, and Inosuke Hashibira to infiltrate the district’s most prominent houses and locate the depraved Upper Rank demon.
[Written by MAL Rewrite]