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.
Word of the intruders reaches Sato and Yasha. Seeing an opportunity for a clean escape, Yasha makes one last appeal to Sato's kind nature. Meanwhile, Touya prepares for the battle ahead - despite Sato's protests.