HELP

I've seen this manhua on youtube & ofc they don't put the title there but it's about a man that go around finding an evil being (spirit or demon) to kill 'em, his job is quite known to society like a cop but for spirit or demon. But he himself had a demon on his heart (literally), and had a red mark on his back that has a shape like a crack on a broken mirror that every year gets bigger & bigger, and one day he met someone that can smell the demon inside him, that person has a cat (more like a cat skeleton that live like a normal cat) name Gabriel.

if anyone know pls HELP