From the introduction:
Welcome to the world of Mahou Sensei Negima! Most of this world is just like the one that you’re used to, but with a few exceptions. First, Magic exists! Mages, and magical beings, mostly live in another “magical world” that can only be reached in a few travel points. Some mages have formed NGOs and try to make the world a better place, but most are isolationist. However, the largest population of mages in the “real world” is the teaching staff of the Japanese Mahora Girls Academy, where you’ve just been accepted as a student or teacher! This school is incredibly advanced, far beyond the world you know. For some reason, the magic and superscience studied here hasn’t spread to the rest of the world. But you’ve just been accepted as a student or teaching assistant there, so that might change. But with a class including vampires, robots, half-demons, ghosts, and several students with mysterious pasts, your time here will certainly be interesting either way.