Yin Yang Ghost Hunter

There are such a group of people in this world. They live in the shadow of this world, and they wander around every corner of the world where there are supernatural events. They do not have a fixed salary or a decent career. Similarly, they may never marry and have children in their lifetime. They are called "liars" by the outside world and "superstitious" by others. Only a few people know what kind of life they live. Some people live in the light catering to the darkness, but they incarnate themselves in the darkness to serve the light. They travel to every corner of the world, traveling between yin and yang. They have a common name, that is - Yin Yang Ghost Hunters.