Earth is world fill of Mutants and is about to be introduced to a Realm of Magic and Monsters Called Mewni as The Princess is sent to attend a school known as Xavier's School of Gifted Youngster. What is to unfold is yet to be known
So, I was an author called Groft45 and did stories called Return to Gravity Falls and Gravity Falls: Return of the Weird. So, I recommend you read those first before moving on to this