For twelve years, Amari Sakura was held hostage in a hidden room down in the basement by her stepfather. When a sudden blackout finally sets her free, she stumbles into an apocalyptic version of Tokyo, where she has to fight for her life playing deadly games. Chishiya Shuntaro is a brilliant doctor who hides behind cold smirks and distant walls. He built them after his childhood best friend Sakura, vanished without a trace twelve years ago, only to be found 'dead'. Her disappearance left a void he could never fill, and now he hides behind indifference, refusing to let anyone close enough to hurt him again. What will become of two childhood best friends when fate reunites them in a world where love and friendship were never meant to exist?