The world of Exo was once peaceful. The world of Exo was once beautiful. That was... until disaster struck and the princess was lost. Her twelve warriors had fought valiently and relentlessly, and most of them had died in the battle. The few who survived went into a deep sleep. A sleep that was about to be broken. The world of Exo was about to be thrown back into the whirlpool of chaos.    

H. University, known to the general public as The University, is said to be a college only for those with serious problems. The truth though is something far more dangerous than just a few hundred troubled young adults. The mysterious H in the University's name stands for Humanoid, and that is exactly what the few hundred young adults are. But if that's the case, then why has Yoosun recieved an enrollment verification form?