Towards the end of the manga,
After Ageha presses Miroku to go a different way to making a society of Psi users, we are shown an airstrike that flies in and demolishes a huge portion of the forest.
WE actually see Ageha and his friends escape, but there is no mention of Miroku and his companions. In the last chapter, it is mentioned that the world "believes" they are dead.
Are we to assume that they die? Or is it that they go off into hiding?