Global Mutation, I Have a Ghost Girlfriend

[Single female protagonist + dual heroes + super powers + counter-routines] "You know, people can turn into ghosts, hiding in society, hiding around you and me..." "Oh, don't get me wrong, I'm not making a metaphor, I'm objectively describing the real creatures in this world." "At least... That's the world I live in." ... One year, evil spirits came and descended on humans. They are ferocious and greedy, and eat humans as food... Xu Sheng, a "scavenger", was slapped by a beautiful girl... And his friends in a dirty street in the afternoon one day. Then, it turned into a half-human, half-ghost creature. So, his story with a female ghost begins...