At first, she just met two female ghosts on the street. As a scientist, she decided to hide the fact that she was mentally ill for the sake of her job. Later, she felt like the whole world was against her. Later, she decided to save the world. ........."As long as I still have breath, I will come back and kill you." "My dear, the mental hospital where you are detained is run by my family. Unless the world ends, you can't escape. How romantic, you will always be mine." Then... The world will really, really, really end. ......... I originally thought that what he said, "As long as you are strong enough, I will become another person and come to you" was just a talk. Unexpectedly, the man actually kept his promise. And it was complied with more than once. Infinite flow, leaning towards science fiction - explaining the existence of ghosts and ghosts in a scientist's way.