Darker Than Black: Gaiden

DARKER THAN BLACK 外伝

After the incidents in Tokyo, Hei and Yin try to bury their past and start a new life, but everywhere they go someone seems to be following them. Unaware to Hei, Yin's current odd behavior appears to be related to a prophecy that might lead to the end of the world. - This OVA series shows the events between the first and the second seasons.