Against the World: :halfies, Demons, Angels

What if you found out that your mother was still alive after years of being missing? Would you do everything to save her? Esmee and Cain were different from each other. She was a human and he was a Supernatural Officer; sole duty to protect the human race from demons. They didn't expect to fall in love with each other. Afraid, to ask Cain for any help on the search of her mother she left only to be kidnapped. Cain and the angel Diamond was her only chance of freedom. Force feelings of hate and loath rised up within Cain. Esmee have to make a choice. Forget about her mother and leave in one piece or die trying to save the one person that cared for her. Cain have a choice to make. Surpass his hatrid of demons and save Esmee's life or live on with his life like nothing happened.