Isekai Quartet

Isekai Quartet brings together the casts of Overlord, KonoSuba, Re:Zero, and The Saga of Tanya the Evil in a chibi-style crossover where powers, pride, and rivalry are squeezed into ordinary school life. After a mysterious button sends Ainz, Kazuma, Subaru, Tanya, and other familiar faces into a strange classroom, they are forced to deal with attendance sheets, club activities, exams, and the daily humiliations of being treated like normal students. Across the franchise, Isekai Quartet plays that absurd setup for comedy, using the contrast between its source worlds to create running gags, awkward alliances, and constant misunderstandings. Proud rulers, reckless adventurers, and ruthless tacticians are all reduced to gossip, homework, schedules, and school rules, while familiar relationships from the original series continue to shape the way the ensemble reacts to one another. The result is a lighthearted crossover built on character chemistry, shared absurdity, and the pleasure of watching overwhelming power collide with the smallest problems imaginable.