Darker than Black
Alternate Title(s): 黒の契約者‐; Darker than Black - Kuro no Keiyakusha
Official Website: http://www.d-black.net/ (Japanese)
Genre(s): Drama, Mystery, Science Fiction
Episodes: Unknown
Opening Theme: "HOWLING" - abingdon boys school
Ending Theme: "Tsukiakari" - Rie fu
Summary:  "In Tokyo, an impenetrable field known as "Hell's Gate" appeared ten years ago. At the same time, psychics who wield paranormal powers at the cost of their conscience also emerged. Hei is one of the most powerful of these psychic agents, and along with his blind associate, Yin, works for one of the many rival agencies vying to unlock the mysteries of Hell's Gate."

~ANN, src