Kaneko wakes up in Yokohama, but she realizes that it has changed from when she last been there...and changed for the worst. A sick and twisted game of survival has begun, ADA and PM are no more, and she and others must fight their own friends in order to stay alive. Inspired by High-Rise Invasion. DEATH ABOUND!

It has been 16 years since the war against the Decay of Angels, but the damage is still fresh. All organizations have been disbanded and the survivors have formed a council. However, ostracization is still at its high. Sooner or later, the next generation will have to take part in helping their parents fight back against adversity. Admist the tension, a new threat will arise.