Demon in my Mirror

Claire is mere human who is 17, but little does she know she's a Fallen Angel, hunted by all creatures, but has a necklace that her Dad gave her before he died that protects her from demons (We'll get more into that later). Later on, she goes to a store to buy a mirror, but what she doesn't know is that it's a mirror from the underworld, Hell.

Amon a demon who died at 12, sent to hell for having a father was a demon in the overworld. Amon was sent to Earth as human forced to find a Fallen Angel.

Little that they both know, they will love each other but start a war if they stay together.