In The Mirror: Demons

Katia, is a girl whose soul has sink into full of sins. Katia, who was in a circle full of vital people-devils, was struggling to get out of this dark world. Will the young girl who has forgotten herself and has become a toy of people, be able to get rid of the demons in her head and around her? She is trying...
But each time it was as if she was sinking deeper into the darkness with the devil inside her. But it wasn't her responsibility. No. It was her experiences and people that made her this way.

Was she herself the sinner responsible for all this, or was the people around her?