It's another world inside the TV. They kinda act like portals, but not a lot of people know about it or can enter 'em. So you don't find a lot of humans inside. The only things that do live inside the TV world are shadows, and Teddie. Well, he lived there for a while, but then he moved in with Yosuke-senpai. But anyways--when someone gets shoved in against their will the world inside makes up these places that fit to the person inside. So almost all of 'em are different.