Black Bird, Beast Master Recommendations
They both involve a love between an "animal" or "beast" and a human (although technically Aoi in Beast Master is not a beast).
The main characters of both of these stories are a lot like beast and yet a girl still manages to fall in love with them. But due to the beast attitude of the guy he gets in a lot of trouble which causes a lot of drama throughout the series. If you like manga with a lot of drama and a not so ordinary love story then you should give these manga a shot!