"Jake?" Finn looked at him in the kitchen from the couch. "Yeah, bro?" said Jake, turning from the window. "Remember that fan fiction Ice King made?" Jake nodded. "What if... What if it was real?" Jake shrugged, joining Finn on the couch. "Well, I'm pretty sure we've been everywhere in Ooo, so it'd be hard to miss alternate versions of us. I mean a girl version of you, bro? That's cray-cray." Finn looked down. "I kind of wish it is. You know, in my gut and junk."
"Well, bro. Have to listen to your gut. What's your gut saying?"
"I think my gut is saying that it is. That chick Fionna and that cat Cake are real. There's some crazy Ice Queen. Marshall Lee, you know that guy version of Marceline, he could be real. Lady could have a fraternal twin, Lord Monochromicorn. It's kind of cray-cray but what if we went to look for them? Do you think we could find them?" Jake took a bite of a sandwich he'd made while Finn was talking. "Well, Finn. I guess we could try. Always have to listen to your gut."

Finn knocked on the castle door. He and Jake stood awkwardly in front of it until Peppermint Butler opened it. "Hello, good sirs. What are you two doing here so late?"
"Um, we need to speak to PB. And it's not late. It's only a little after dinner." The butler scoffed. "Whatever. Come in." Finn and Jake followed him through the castle doors. Attention, Princess! Finn and Jake are here." They could faintly hear Princess talking to someone. "Come on!" The other person said something. "It's only Finn and Jake, it's not your dad or anything." They heard the other person mumble a "whatever" and footsteps coming down. Finn and Jake were surprised to see Bubblegum and Marceline walking down together. "Hey, Marceline. I didn't know you were here. We were about to go to your house next anyways so this saved some time." Bubblegum and Marceline looked at each other, confused. "What do you want, Finn?" Marceline asked.
"Remember the fan fiction Ice King made that we told you about?" The princess and Marceline both nodded slowly, their eyes squinting as their confusion increased. "We're going to find the characters, or people, in the story. The girls started laughing. "You're joking, right? They aren't real!" PB exclaimed. Finn scratched his head. "Listen guys, Finn's gut told him that they were real. You have to listen to your gut and you know that." The princess and Marceline got serious. Well, then it's actually very likely that they could exist."
"See, I told you!" Finn exclaimed. "Let's go get Lady and then we can venture off. And since its dark, it's a good chance that Marshall is out there too, right?" Marceline's face lit up. They left the castle and went off to find Lady Rainicorn.

"Hey, Cake! Catch!" Fionna tossed the Frisbee to her sister. Cake stretched her torso into the air and caught with her front paws. "Cake, you cheated. You have to catch it without your powers."
"Yeah, Cake," a voice above them said. "You can't cheat like this-" Marshall Lee swooped down from the sky and took the Frisbee from Cake's grasp, returning to his position in the night air. Prince Gumball ran up to them. "Marshall, you need to throw that back!" He laughed in reply. "Okay, if you say so." He threw it down at Gumball's head, causing him to fall to the ground. Fionna ran up to him, "Oh my gosh, Gumball, are you okay?" He grunted, easing off the ground. "I'm fine." Cake ran up to them. "Are you sure, sugar bun? You got a bump on your little head." Lord Monochromicorn flew out of a black hole, knocking Marshall from his spot in the sky. "Gumball! Watch your horse, man!" Lord Monochromicorn said something. "He wants you to know that he's not a horse, he is a Monochromicorn." Marshall scoffed. "Whatever."
Cake was looking up at the sky, confusion covering her face. "Lord Monochromicorn, I didn't know you had a sister." Everyone looked up. There was a multi-colored, pregnant, female version of him flying towards them. "Neither did I," Prince Gumball said. Fionna looked closer. "Hold on. There are people on her!" Marshall saw them too. "Yeah, you're right. And they look... they look like us!"
The strangers landed about 100 feet from them. A boy, dog, vampire, princess, and rainicorn began to walk to them. "See, I told you guys!" the boy said to his friends. Now everyone, Fionna, Marshall, Gumball, Cake, Lord Monochromicorn, and the strangers were standing in parallel lines to each other. "Who are you?" Fionna asked. The boy spoke first. "I'm Finn. You must be Fionna." She took a few steps back, and pulled out her crystal sword. "How do you know my name?" To show he was prepared too, Finn took out his similar gold sword. "Our, um, friend Ice King told us an imaginary story about you. At first, we thought you guys weren't real, but today my gut had this feeling..."

Cake and Fionna exchanged a shocked look. "Didn't Ice Queen tell us a story like this? With a boy named Finn? And a dog named Jake?" Cake nodded. "That dog would be me," Jake inserted. Marshall Lee levitated into the air, Marceline joining him. "You must be Marceline the Vampire Queen." Marceline blushed. "And you, Marshall Lee the Vampire King." He took out an apple, handing it to her. "You want it? I was gonna save it for later, but you look like you haven't eaten recently. She nodded, blushing even harder. On the ground Lady Rainicorn and Lord Monochromicorn were trying to communicate, but it was mostly Mo-Chro talking since he couldn't understand Lady's Korean.

Everyone else went off into their own little areas while Fionna and Finn were still frozen where they were at first. "So, you're human too?" Fionna asked. Finn nodded. "Do you think, we could be related or something?" he asked. Fionna shrugged as she led him over to a picnic blanket she and Cake had brought. "If we were, we could've been separated after that Mushroom Bomb went off. You know, in the Mushroom War?" Finn shook his head. "No. I made this wish in Prismo's time room, and it took me back to then. I didn't see you." Fionna began eating a burrito from the picnic basket. "I did the same. And I didn't see you. Maybe we were there at our house in different times?"

Jake and Cake overheard their conversation and walked over. "I don't think you guys are related." Cake nodded her head in agreement. "Maybe you two were destined for each other." Fionna blushed. She hated that topic. Finn on the other hand had no problem with it. "We can't be destined though. That's me and Flame Princess." Cake looked at him, eyebrows raised. "What? Is Fionna not dating Flame Prince?" Fionna looked at him. "What are you talking about? Who is Flame Prince?" Jake and Finn exchanged a glance. "Have you guys not traveled to the Fire Kingdom? Have you even been to the Ice Kingdom?"

"Well of course we've been to the Ice Kingdom! How else would we meet Ice Queen? We just haven't ventured to the Fire Kingdom." Marshall Lee, Marceline, Lord Monochromicorn, Lady Rainicorn, Princess Bubblegum and Prince Gumball joined the conversation as well. "Does this mean we have to go find them?" Marshall Lee asked. "Well I suppose eventually we can get Ice Queen and Ice King to meet, but right now we need to find Flame Prince."