The back story

16 year old athena lives alone and is what people call a freak. She has two different colored eyes and she's what people will run screaming the other way if they found out what she was. Athena is actually a demon. when she was young her parents hated her and left her on the street to fend for herself. after this Athena died but could go to neither heaven or hell. when Athena meets a mysterious boy dressed in black with purple hair, her world changes and she realises why she can't move on.