The last surviving member of her clan, Mirai Kuriyama is cursed with the terrifying ability to control and manipulate blood. Akihito Kanbara being half human and half youmo has made him immortal and doomed to a life alone. Alone their future seems bleak, but when a chance encounter brings them together, it becomes clear that they share more than just an unexpected bond. Beyond the world that we know, in a realm where nightmares are real and legends walk, their future awaits BEYOND THE BOUNDARY.
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.
Mirai successfully takes down her first Youmo, with a little help from Akihito. Later, they find out about a menacing new monster on it's way to town.
The Hollow Shadow has crept ever closer to town, and while all other spirit warriors go into hiding, Mirai is determined to take it down.
The Hollow Shadow has trapped Mirai and Akihito in a neverending labyrinth. However, defeating it is only the beginning…
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.
A special youmo with a penchant for pretty girls gives Mirai a tough time. Akiyama enlists the Literary Club for support.
Akiyama finds a weakened Sakura and assists her. Later, Sakura confrints Mirai, seeking vengeance.
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 has lost control and his youmu side has awakened. Mirai is faced with the hardest decision of her life.
Mirai succesfully stopped Beyond the Boundary, but at a great cost. The truth behind Mirai's past is revealed.
Mirai's battle with Beyond the Boundary rages on in a new dimension, while Akihito tries to figure out how to bring her back.
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.