The hostess was possessed by a mysterious creature in a car accident, and woke up to another world full of demons. Just when she was puzzled, feared, and hopeless, a teenager appeared to save her. It was learned from his mouth that there had always been a demon spirit in this world. The creature inside her was a demon spirit named "Human". She could not take it out in a short time and was forced to live with the teenager. Then he embarked on the no return path to catch a demon
