Beyond the controversy, perhaps ToAru too, in its universe it is supposed to be full of hundreds of millions of phases that are supposed to even can collide and are in the form of layers, which are mostly the size of the universe, some not even have a concept of time or space, other phases are heaven, hell, Olympus, Naraka, etc. All of this is generally considered to be in one universe, I am not going to enter into the debate whether that would be multiversal in scope or not but it would be a single fairly large universe.