The system said this world is a Crossover fanfiction world

Synopsis This is the story about how the average person gets a system that is actually for the soul who transmigrated to his body after he died, but because of some error, he didn’t die and still gets the system. Ah— and it looked like the system said that his world is a fanfiction world from many anime and manga itself. —------------------------------------------------------------------------------------------------------------ This Fanfic is made just for relief of my stress and guilty pleasure, especially made while I was waiting for treatment at the dentist—- read at your own risk. There is no plot, no hope and nothing to gain except you’re reading my wild fantasy when I feel bored. This is a harem that I don’t care about anything and put anyone I like or feel when I write.