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Soon after escaping from No. 6, Sion finds that he is also infected. The parasite is extracted by Nezumi from his body and he survives, but not without taking its toll on his body. Having recovered, Sion is taken by Nezumi to a hotel whose owner rents her dogs to keep the guests warm while sleeping. He finds out that Nezumi contacted his mother and she sent a message to him. By analyzing the parasite, Sion concludes that when spring comes, a large number of them will emerge and kill their hosts, causing turmoil in the city. By learning that such great tragedy will befall the place he loathes, Nezumi rejoices, but when Sion states that the inhabitants of No. 6 must be warned, Nezumi claims that if Sion insists on helping them, Nezumi will start treating him as his enemy.