One can't die, and one can manipulate blood. When these two meet, a chain of events will take place that will send their intertwined fates into wild directions.
As punishment for going after the Hollow Shadow, Mirai's hunting license is revoked for one month. She's forced to take a part time job, but learns more about herself in the process.
The Calm, a time of fear for all youmu and half youmu alike, is fast approaching. As the clock stirkes midnight, all youmu become weakened, and thus, become easy prey.
Akihito reunited with Mirai within Beyond the Boundary. Meanwhile, the Nase family fights a different war on the other side in the thrilling conclusion of Beyond the Boundary.
Episode 0 takes place two years prior to the TV series when the Nase siblings meet Akihito for the first time in a mission for Hiroomi. Mitsuki follows her brother on this mission and their goal is to subjugate Akihito.