This is classic Melissa De La Cruz, in the best and worst ways.
A character knowledgeable about a magical world without coming off as too bad a fan is actually sweet to see. Cosplay and fan fiction is dioxide without feeling forced. That's all a dedicated or casual fan would want written about.
The twist of the princess is used again, which isn't so terrible, but the ending feels so rushed compared to the rest. I feel she could have had another half hour of content to pace it out.
But as with the ending, it leaves you wanting more, and if nothing else, that is absolutely what you want in a story. It is wonderful to want more, especially in a story about hunting cheeseburgers and eating lillies. There is a sweetness that any young person, or anyone, wanting a Happy Never After can find.