The Kokuboro's Declaration of War.Aihi develops a durable edition of the human skin suit for four recruited ayakashi to wear. Kaguro, among the group, unexpectedly announces their arrival at the school grounds during the day to schedule a negotiation with the kekkaishi during the night. The nocturnal Sanan demands for the site to be handed over to them, but the kekkaishi reject the proposition. Gen, sensing trouble, is badly wounded in plain sight by Kaguro, having the other four take him away. The four create a dispelling square to ward off barriers, making the kekkaishi vulnerable to the attacks of the molluscan Sekia and the amphibious Haroku.