"Domain" is the general term used by humans for another world.
"Domain Gate" is the bridge connecting the two worlds.
Chen Le was born in a place called Karma Prison since he was a child. The reason why it is called the prison of karma is because only criminals are allowed to enter this prison.
You cannot use your abilities in Karma Prison, and you can only rely on physical skills to survive.
The chance of getting out of prison is only once every 10 years. If you want to get out, kill them.
Chen Le: "My name is Chen Le, and I am an evildoer. I hope that my life will be happy. If you make me unhappy, I will make it impossible for you to be happy again."