A/N: And now, the first chapter of the original story I mentioned. I know it may seem silly and, well, odd, but rest assured, the next chapter in "Adventure Time with Finn, Jake, & Rachel" will not only follow up after this first chapter of this story soon, but also be the first flashback episode for back when Simon was the Ice King. And by the way, to avoid any confusion, this is not a Valentine's Day special for Adventure Time.
Adventure Time: The Big Belly Club
Chapter 1: The First Night
Later, while everyone else was asleep, Rachel opened her eyes, slowly popped out of her ball-like hair, and went downstairs into the kitchen.
"All right. The coast is clear. Time to see if it works.", Rachel said.
Then, she looked up to the tiara and touched it, making it glow. In no time at all, her belly growled as it, along with her body swelled and fattened up, stretching her pajamas, which started to fade away as she grew larger. Rachel moaned as her body swelled and grew larger and larger until she was once again as rotund as she was when she and Finn first fought Magic Man, let alone just as bare with her hair covering her chest up font as well as her back from behind on account of her pajamas having finally disappeared completely.
"Ahhh... Well, would you look at that? It worked...! It feels so good to be large and in charge again...! Never thought I'd actually say this, but thank you, Magic Man...!", Rachel smirked.
Then, her big belly growled again.
"Ooohhh...! I feel so hungry...! Better get something to eat.", Rachel smirked.
So, she waddled over to the fridge, opened it, and discovered inside an abundance of food and drinks.
"Whoa...! There's so much food in there...! I can't wait to eat it all...! Or, at least, you know, half of it.", Rachel salivated with a blush.
Then, she started taking the food out of the fridge. Eventually, half the food and drinks in the fridge have been taken out.
"Whew... Well, that should just about do it.", Rachel grinned.
But before she could take a bite, she realized something.
"Wait... Maybe it'd be more fun if I got someone to feed me all this food I picked. So...", Rachel began.
She then flew out the window and landed on the grass outside. After that, she moved all the food she picked from the fridge into the cellar.
"There. Now, I just need to bring in a little someone for this fun night.", Rachel smirked.
Then, she flew back inside the way she came, flew upstairs, and then landed on Finn's bed with a squeak.
"Psst. Finn.", Rachel whispered as she gently tapped Finn in the cheek.
It took a few times, but Rachel managed to wake Finn up as he fluttered his eyes.
"Hi.", Rachel greeted.
Instinctively, Finn screamed in surprise abruptly, prompting Rachel to cover his mouth.
"Shh...! Can you keep it down, please?", Rachel whispered.
For a time, Jake muttered in his sleep, but then he got back to snoring again, earning Rachel's sigh of relief.
"Before I move my hand away from your mouth, we need to take this outside. And no screaming when I do. Okay?", Rachel asked.
Finn nodded in reply.
"Good.", Rachel grinned.
So, she flew out the window with her hair, taking Finn with her until they're both outside and are now on the grass.
"Okay. Now, we're outside. And I'm gonna move my hand away from your mouth now.", Rachel said before doing so.
"Rae-Rae, flip. What the zip happened to you? How are you so bigguns again?", Finn asked.
"Well, Magic Man may have turned me into a belly the first time, but this time, I used my tiara. It must've been because how it stabilized the spell Magic Man cast on me. I wasn't exactly sure if it'd work, so I thought I'd give it a try. So, here we are.", Rachel grinned.
"And why are we out here, exactly?", Finn asked.
"Oh. Well, I was going to eat half the food from the fridge, but then I thought it'd be more fun if someone were to feed me the food I picked.", Rachel replied.
"Really? That's bananas.", Finn responded enthusiastically.
"I know, right?", Rachel responded as she and Finn arrived at the cellar.
"So, this is where you put half the food from the fridge, right?
"Oh, yeah.", Rachel nodded.
"Well, in that case...", Finn began before then opening the door.
"After you.", Finn offered.
"Thanks, Finn.", Rachel thanked.
With that, Rachel waddled her way in first. But on the way in, she found herself stuck.
"Oop. Huh. Well, that's odd. Still, nothing a little squeeze wouldn't fix.", Rachel said to herself.
So, she grunted and strained as she turned and pushed as best she can. Eventually, she made it in and landed on the ground.
"Whew...! Finally, I made it in...!", Rachel sighed as Finn entered next with a bit of a chuckle.
"Wow. So, that's the cellar?", Finn asked.
"Yeah. Well, I think it was empty before I put all this food in, though.", Rachel replied.
"Yep. That'll probably do it.", Finn said.
Then, Rachel's belly growled.
"Uh... maybe just a few will do for now.", Rachel blushed.
With that, Rachel ate a few items from the fridge. As she ate, though, she grew larger and wider, not to mention chubbier as well. Although, it was only by a meager 30 pounds at best.
"Ah... That's better. I guess. So, how do you wanna test this new bulk?", Rachel asked, shaking her belly with a smirk and a thrust.
"Maybe some kind of match?", Finn asked.
"Not bad. And here's one I think you'll find suitable in this case.", Rachel asked.
"What's that?", Finn asked.
"A sumo match. And all you have to do is try and push me to the ground to win.", Rachel grinned.
"Just like that? Okay.", Finn replied.
Then, he quickly proceeded to push Rachel by the belly. But that was met with less than success. In fact, when Finn tried to step forward, his feet just slide against the wood floor, making no movement whatsoever.
"Okay, time's up.", Rachel spoke.
Then, she started taking a few steps forward. This caused Finn to blanch out a bit in surprise as he still persisted. But his struggle grew worse when she took the 2nd step. In fact, at that point, he was leaning backwards from the 2nd step. After the 3rd, that was when Finn tumbled to the ground on his back.
"Aw, man...", Finn groaned.
"Well, I could tell you're trying hard, but it still wasn't enough to send me tumbling.", Rachel said.
"There's gotta be some way to buff me up some so I could at least actually push you at your size.", Finn said.
"Yeah, but it's not that simple. After all, it's only regular food I picked out from the fridge. I mean, the only reason I fattened up some was because of the tiara's magic. Even I don't know how it exactly works, and it's been over 1,000 years.", Rachel said before her tiara glowed, prompting her to look up at her tiara.
Then, a smile suddenly came across her face.
"Although, tonight we could find out ourselves.", Rachel smirked.
"How do you know that?", Finn asked.
"Look.", Rachel replied, apparently getting out a cupcake with frosting resembling Finn's hat and face she found from the fridge.
"Hey, isn't that...?", Finn began.
"A Finn cake? Yeah.", Rachel replied as she then used her ice magic to sprinkle some snowflakes onto the Finn Cake, making the hat portion of the cupcake appear bigger.
But that's not all. The Finn Cake suddenly grew a bit bigger as well until it was at least 1.5 times bigger than normal.
"Whoa. It looks a bit bigger, now.", Finn grinned in awe.
"Well? Go ahead. Try it.", Rachel offered.
"All right.", Finn responded.
So, he ate the enlarged Finn Cake a few bites at a time.
"Okay, now what?", Finn asked.
Suddenly, his body was starting to swell up, making him give a yell of surprise.
"What's happening?", Finn asked.
"I think you're getting fatter like I did.", Rachel guessed.
"What?!", Finn asked, almost in shock.
"It's okay. At least it's not by much. See? It's stopping now.", Rachel said as Finn's swelling slowed to a stop.
"Hey, you're right.", Finn responded, checking himself out. "Huh. I think I look about as chubby as I used to be when I was little."
"Okay. Now, let's try again.", Rachel grinned.
Finn gave a nod with a smiling grunt. Then, he tried pushing her again. But this time, he was making progress.
"Hey... You're doing it...! You're actually doing it!", Rachel spoke excitedly as she was pushed to a point that she was leaning backwards.
Finn gave a sort of yell before finally pushing her to the ground the way she did in the last match.
"Oh, man...! You got me, Finn! You win!", Rachel grinned.
"That's the match, boyee!", Finn spoke eagerly, making Rachel laugh.
"I think this calls for a celebratory feast. But how do we go about it? You feeding me? Or simply just eating different piles together?", Rachel asked.
"Why not a little bit of both?", Finn asked.
"Great idea.", Rachel said.
Then, both started eating food together. Rachel moaned a bit as she swelled bigger and larger for a bit, covering a quarter of the floor already.
"Finn, hit me.", Rachel said before Finn fed her some food, allowing her to swell a bit past the quarter of the floor.
So, they ate and they ate and they ate and they ate. And likewise, while Finn only got marginally bigger, Rachel grew much bigger, larger, and wider until there was no food left. Finally, Rachel had grown into a massive blob, covering up every square inch of the floor of the cellar as Finn now rested on top of her belly where both can look out the windows.
"Ah... Now, this is the kind of life I could live whenever I wanna relax.", the blob-like Ice Princess sighed in content.
"Not really hard to see why, Rae-Rae. You're so bigguns.", Finn responded.
"Yeah, that is true.", Rachel grinned.
"I never knew being fat and lazy is so rewarding.", Finn grinned.
"I know. Although, I could probably understand being fat, but being lazy? Let's not get crazy.", Rachel said.
"I'm just sayin', Rae-Rae.", FInn said.
"I know. In fact, I could understand where you're coming from.", Rachel responded.
"Yeah... In a way, I guess it's a good thing I had this tiara with me when Magic Man cast a spell on us. Otherwise, we wouldn't be enjoying this time to ourselves. Plus, I could always turn us back when we feel like we need to get something done for the day.", Rachel said.
"Amen to that.", Finn grinned, earning her giggle, which made him giggle before both sighed.
After a moment, Rachel finally spoke up again.
"Hey, Finn?", Rachel asked.
"Yeah, Rae-Rae?", Finn asked.
"Maybe we should start a Big Belly Club together.", Rachel suggested.