That Which Is Not Human

Natsume accidentally bump into a woman and realizes that the woman had blood covered her body. He then follows the mark that the woman left with blood and found a house. When he open the door, he was surprised by the scene of some ayakashi that was badly injured. When he checks one of it, someone suddenly grab his neck and trying to kill him until another ayakashi help him and run off. There's been someone who kill ayakashi for blood and with the help of Natori, Natsume search Matoba who he thought is the one behind all of this. When he met Matoba for the second time, he can't escape the man.