Life & Death
Soon after escaping from No. 6, Shion 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, Shion is taken by Nezumi to a hotel whose owner, Inukashi, rents her dogs to keep the guests warm while sleeping where he finds that Nezumi contacted his mother and she sent a message to him. By analyzing the parasite, Shion 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 Shion states that the inhabitants of No. 6 must be warned, he claims that if he insists in helping them, he will start treating him as his enemy.
Aired 22/07/2011EP 3 - Life & Death

No.6
In a near future world, after the last great war, most of mankind lives in a handful of city states. There, for the privileged elite, life should be perfect. But for young Shion, the only thing perfect has been the nightmare his life has become since letting a strange boy called Rat spend the night in his apartment.
Banished to the outskirts of the city and stripped of all privileges for helping the mysterious stranger who has since disappeared, Shion now finds himself in even worse danger as his inquiry into a new series of mysterious deaths results in his being arrested on suspicion of murder!
But even as Shion is being sent to the city's Correctional Institute, the long-missing Rat reappears to rescue him! Now on the run, the two young men have only one chance at survival: uncover the mysterious secrets that lie at the sinister heart of No. 6!
(Source: RightStuf)