I don't know when, life on earth that has reached the highest level of technology. suddenly disintegrated into ruins, beasts came out of nowhere, hundreds of years humans had to live in fear, until one day, someone managed to create a door to tame the beasts.
The door was named after the Founder name, the Rayyan door, according to history the door connects the human world with the world where the beasts come, when a human stands in front of the door.
A beast who feels connected to the human will appear , and then become one part of the human, they will be connected until one of them dies, in the sense of the word if the human dies then the beast also dies.
