Black eyes au

A au i thought of basically it origins off the original where fox's human sister is muder and she goes on a rampage but she never gets back to her normal self as for demons were told by heaven to take care of her or they would they put her in containment for years. 16 years later at age 21 a new doctor name kiro comes into the picture he is specialist to demon in like sort of long term insanity rampage and he gets assign to fox, he sees something in her that most people don't, hope, and he slowly unravels her into her old self or least he hopes to as he's never someone in this state for so long. Will kiro soften and heal Fox's broken heart and reveal those beautiful red eyes or will he unleash a new beast