Well this isn't a bad game after all, but I suggest you to unlock a nation as soon as possible. I know that there are many things to do in those 3 nation but now it's boring to loitering here and there, exercise the bosses, completing the same domains. There is also some great story quest and hangout events but after competing all of that stuff there is nothing to do. As a traveler, we really need to move forward to search of him/her. So unlock the 4th nation ASAP.