Rmmbr the early chap when haruto goes somewhere i forgot where with an orb, and the orb just let a voice "what is the hero doing here?" Some kinda lines?
I'd say that world truly is andalugia, but after the "forced go home" spell they want to take the world under their hands and use something like global scale memory manipulation or smth, and now is controlling the world through heroes and a fake demon lord, that's why they need the (real) hero to get out of the picture.