The world that people live in is a physical world, but on the other side of the mirror, there is still a projection of the real world - the mirror world. The "people living" in the mirror world are just "puppets" of human beings in the real world. They have no thinking or communication, and all "their" actions are just reflections of their actions in the real world. However, there is a kind of person who can enter the mirror world and even react by harming the human projection in the mirror world...
