Marshall Lee and Prince Gumball are both invited to Fionna's slumber party (they're all really close in this story, so this isn't considered weird for them). Gumball has a secret crush on Marshall that only Fionna knows about. Things go down and...well you'll have to see the rest for your self.

Marshall Lee (the Vampire King) and Prince Gumball (prince of Aaa) cross paths at an unusual time. From there, the adventures of "Gumlee" start. (THERE WILL BE NO SMUT IN THIS STORY. I SUCK A WRITING THOSE... But there might be some romance 😏)