Ghost Hound
I finished the anime Ghost Hound last night, which an acquaintance of mine recommended to me a while back. Apparently, some of the same staff who worked on serial experiments lain, which I loved, also worked on Ghost Hound, including writer Konaka Chiaki. The resemblance was obvious, too, since both tackle similar themes and share some stylistic touches (like extreme close-ups of people’s eyes or mouth).
Overall, it’s an excellent series.