"Alien"
A world that is independent of the observable universe that people are familiar with. The creatures there are completely in a form that humans cannot understand. For some reason that humans cannot understand, they eagerly hope to come to the real world. However, because their life forms are different, they cannot come directly to the present world. They can only come to the present world by possessing human beings and other existing entities. It is unclear whether there are alien creatures and whether alien creatures could be possessed.
"Mutant/Superpower"
The vast majority of possessed humans or other animals and plants will become mutants because they cannot withstand the possession. Their appearance is extremely twisted and terrifying, their will has been replaced by alien creatures, and they are usually extremely aggressive. Due to the characteristics of alien creatures, they will have certain supernatural powers.
Psychics are a special result of possession by a very small number of talented or determined people. They can use the unique supernatural powers of otherworldly creatures, but still retain their own consciousness. However, most people with supernatural powers are unable to resist the temptation of power brought by their powers and embark on a sinful path.
"Catastrophe"
More than twenty years ago, the separation between the other world and reality was no longer clear, and the number of possession incidents by alien creatures increased dramatically. At the same time, the leaked superpower interfered with the electromagnetic field, making air traffic very dangerous and making navigation more difficult. The superpower also caused biological mutations and almost destroyed the entire ecosystem. The government's explanation for this is "climate change", "magnetic field change", etc., But no government has disclosed the truth about the other world.
Purpose: Micro-terror adventure