To adapt is to survive, a relatively common phrase in today's society on earth. After awakening, many things changed and continue to change every moment. Adapting became an essential skill, so much so that it became part of the culture itself.
The only irony is that humanity was trying to adapt, but they could not keep up with the changes. Every day the mutated beasts evolved more; they showed more coordination and intelligence; more importantly, the beasts were becoming increasingly aggressive towards humanity.
Humanity had its own ways of protecting itself, but these were either becoming obsolete or creating their own problems. Firearms became less and less effective against the most powerful mutated beasts or against those with strange abilities. While the espers were stepping up to become humanity's new trump card, the problems spawned by the espers couldn't be ignored either.
