Black Bird

is a manga written and illustrated by Kanoko Sakurakoji. It was serialized in Betsucomi from July 13, 2006 to December 13, 2012. It received the 2009 Shogakukan Manga Award for shōjo manga. The series has been adapted into a drama CD as well as a light novel. It is licensed in North America by Viz Media, who serialized it in Shojo Beat from August 4, 2009.

Plot
Misao sees things that other people can't. Normally, the monsters would do harmless things. But suddenly, on her sixteenth birthday, the creatures she sees take it farther by trying to kill her. She's saved by a childhood friend from her past, Kyo Usui, who just so happens to be a demon as well. She finds out that she is the rare, "Bride of Prophecy", also known as "The Senka" or "The Holy Fruit", and depends on Kyo for protection from those who wish to eat her for her blood, which gives the consumer incredible power.

Official

 * Columbia

Other Sources

 * Wikipedia
 * Anime News Network (Manga)