I Am a Cow and a Horse in the Underworld

I was a delivery boy who was killed by a husky. They said that I was a "living soul" that was rare to see in a century. I was not in the book of life and death, and I was not reincarnated. Even the ghosts thought I was too hot to touch. Something awakened in my chest. It is guarding me and feeding me. (More than 100,000 words have been saved, and it will be updated daily, so feel free to follow it)