第4話: 見守る者に怯える夏野、死因を調査する律子、そして衰弱する砂奈を看病する俊夫

Natsuno goes to bed each night wary of a presence peering at him through his windows. Ritsuko learns from a villager that the local policeman Takami died, with his family suddenly moving away without saying their goodbyes. He is replaced by another officer named Sasaki. Ritsuko realizes that another family also moved away when one of their kin died, and coincidentally, they employed the same mover company. Toshio is called to perform resuscitation on Mikiyasu's son, Susumu. He notices that Mikiyasu is also suffering from early symptoms of the illness. Toshio tells Seishin over the phone that Susumu is indeed suffering from anemia just like the other victims. Unfortunately, both father and son's condition is too late to be saved. Seishin wanders into the forest and encounters Sunako going out for a walk. Sunako tells him that she suffers from a disease that makes it too dangerous for her to be exposed in sunlight. Toshio gathers the hospital staff and announces that nineteen have died since September 10th, with Mikiyasu being the latest victim. They discuss the possible causes and plan to put up a report for the Public Health Department. Natsuno gets a lack of sleep from seeing visions of Megumi and requests to stay at Toru's place. At night, Natsuno senses Megumi and Tatsumi's presence and realizes it's not a nightmare. Megumi is jealous of Toru's presence and is about to bite down on him, with Natsuno unable to move. (Source: Wikipedia)

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