Darker than Black: Origins

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.

In the sequel, Hei and Yin are now on the run after betraying the Syndicate in the previous season. After leaving Japan, Hei encounters Suou Pavlichenko, a 13-year-old Eurasian girl who becomes embroiled in the war and politics of the various factions and Contractors vying for power. Meanwhile, Hell's Gate remains standing in Tokyo, after Hei's efforts to stop the Saturn Ring anti-Gate particle weapon from activating. Although Contractors are safe from the danger of having their existences erased, this does not prevent new and old Contractors from abusing their powers. As Misaki Kirihara and her team in the Public Security Bureau deal with the increasing Contractor cases, she also has to keep the Syndicate at bay, who has major positions in the Japanese police and intelligence bureaus around the world. The storyline setting primarily takes place in both Japan and Russia.

A side story of Darker than BLACK, also known as Episode 26. A Contractor was killed and it was rumored that his corpse and possessions were buried under a Sakura tree. Hei and the others (including the Police) decide to investigate.

Long ago there were fierce gods of legends who shook the earth to its foundation with their power. There are now prehistoric rivals from the primitive times in Japan, that fought to protect their secrets in the present day. The God of Darkness Susanoah-oh is now sleeping in the shadows of the underworld waiting for his rebirth. However his coming hasn't gone unoticed. There are agents from the Kikuchi Clan (descendants of Japans first inhabitants) who have seen the warning signs of the spreading of darkness's bringing. These investigators are armed with ancient knowledge and artifacts who are willingly prepared to face the God of Darkness. Now they must fight the assembled spirits of hell to find the one young boy who is chosen by fate to grasp the chaotic might of the deadly Gods.