Mirai isn't allowed to hunt youmu for one month as punishment for going near the Hollow Shadow. Now she must get a part-time job to pay the bills. As Mirai comes out of her shell, perhaps she will heal the hearts of those around her...

The Calm is coming. This is a dangerous time for youmu since it is when their powers grow weak. But what does that mean for the ultra-rare half-youmu, Akihito? And Miroku seems to be up to something. What does he have up his sleeve?

According to Izumi, Akihito’s youmu transformation could be permanent! She tells Mirai that she must kill Akihito during the Calm or else he will become a powerful youmu gifted with immortality. Mirai is torn by the decision she must make.

Now that Akihito and Mirai have been reunited, they must work together to defeat Beyond the Boundary’s core. But what will happen to Mirai and Akihito once it has been defeated...? Will either of them survive?