Hisaki and Yasha are an odd pair of friends: Hisaki is quiet, distant, and possibly keeping secrets from everyone, while Yasha is loud, violent, and in serious need of anger management. As they try to deal with each other, they soon find that creatures are after them for something they know nothing about: a demon supposedly hiding within one of them.
Kijo finishes teaching Hisaki about the Darkfire, and before too long Yasha is back. She and Hisaki are alone in a world of demons, and someone is approaching them...