Isekai Quartet 3

Picture every major isekai protagonist you know — Ainz from Overlord, Kazuma and his useless goddess from KonoSuba, Subaru from Re:Zero, the tiny war-crime machine Tanya — now shrink them all into chibi form and throw them into a school together. That's Isekai Quartet, and this third season adds even more characters to the chaos, including Cid from The Eminence in Shadow and Naofumi from Shield Hero. The setup is simple: a mysterious button transports these characters into a shared school setting where they have to deal with classes, clubs, and each other. The fun isn't really in the plot — it's watching characters from completely different tonal universes bounce off one another. Tanya trying to maintain military discipline while Aqua cries about everything. Ainz pretending he has a master plan while surrounded by people who actually don't care. Cid doing his whole "lurking in the shadows" routine in a classroom. Each episode runs short, so it never overstays its welcome. The humor is self-aware and leans hard into poking fun at isekai tropes, which works because these are the series that defined those tropes in the first place. If you liked the vibe of Attack on Titan: Junior High or Kaginado — where familiar characters get dropped into silly slice-of-life scenarios — this is the same energy but with a bigger roster. You don't strictly need to watch the source shows, but knowing them makes every joke land harder.