Cassia: The Alpha King's Outcast Omega

I am the ruler of the heavens and all realms. I came to the earth unintentionally. After seeing the talents of the earth, I felt that the earth has potential. So when I left, I created 500 sets of systems like in the novels you read., As long as like and reply 1, you can get the supreme system, and you don't lose money. Don't wait for the time to regret. So, what are you waiting for?

This is a good book. The writer put quite good effort writing this.