Isekai Quartet

A mysterious red button appears before people who are already accustomed to impossible worlds. Curiosity wins, and one press sends Ainz, Tanya, Kazuma, Subaru, and their companions into the same unfamiliar place with no explanation and no obvious escape. The greater surprise is what awaits them there: not a war or a demon king, but uniforms, classrooms, and orders to live like ordinary students. Their powers, personalities, and the rules of their original worlds could hardly be more different, so even the simplest lesson or school activity quickly turns into a clash of egos, misunderstandings, and absurd comedy.