Black Bird Vol 1

Black Bird by Kanoko Sakurakouji. A Shojo manga rated Older Teen, published in English by Viz Media.

Misao has always been able to see demons, and on her sixteenth birthday they come for her, because her blood can give them incredible power. Her long-lost childhood friend Kyo returns as a tengu demon lord who vows to protect her, but his protection comes with a price. A steamy supernatural romance.