Kimetsu no Yaiba Movie: Mugenjou-hen Manner Eizou

The self-proclaimed god of flashiness, former Sound Hashira, and husband to three wives, Uzui Tengen steps out of the Demon Slayer universe and into a modern movie theater to teach you how to behave during a film. That's the whole premise of this one-off short, and honestly, it works way better than it has any right to. Screened before the Infinity Castle movie in 2025, this ufotable-produced clip runs just a few minutes and features Tengen alongside Hinatsuru, Makio, and Suma as they walk through basic theater etiquette: silence your phone, don't talk during the movie, that sort of thing. The charm is entirely in the character dynamics — Suma's dramatic crying, Makio's short temper, Hinatsuru keeping everyone in line, and Tengen being, well, Tengen. It's a small comedic bit that leans into the personalities fans already love and drops them into an everyday scenario, which is where a lot of the humor comes from. If you've enjoyed stuff like Attack on Titan: Junior High or that Naruto: Shippuden Sunny Side Battle special — where familiar characters get thrown into mundane, slice-of-life situations — this hits the same note. It's not essential viewing by any stretch, but if you're a Demon Slayer fan heading into the Infinity Castle movie, it's a fun little warm-up that sets a good mood before things get intense.