Tumblr Requests [Adventure Time/Reader]

Donked Up [Fern]

A/n: Someone in my tumblr requested angst with a happy ending, this is my first try at this soo...

Gender Neutral
Warnings: (attempted) Angst

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"Fern don't leave me here! Fern? FEEERN!" Finn's shouting could be heard from behind the stone wall, but the farther Fern walked away, the less he could hear him.

Fern took a step outside of the stone dungeon with a content sigh. The landscape in front of him looked prettier, he feels happier, confident, like he's finally where he's supposed to be. Now that he left Finn behind and took his place, he feels like a new man.

He made a mental check in the list of his head, now it's time for step 3 of his plan.

Fern pulled out a simple bouquet of flowers from his backpack, giving them a sniff before walking away with a smile itched on his face.

He'd finally be able to confess his feelings to you. You're always so upbeat and kind to everyone, 'Even with someone as wonk as me.' Fern thought to himself with a frown.

But he's no longer the downer plant boy, he's now Finn. Everybody loves Finn, and there's no way you wouldn't like him too. Fern can already see it, he'll confess his feelings to you and ask you out, you two already have some chemistry going on due to the friendship you two already have, slowly but surely he'll worm his way in your heart the same way you squeezed into his. Sooner or later you two will go out adventuring by day and cuddling at night in a wrapped blanket with a video game or a movie at hand.

Fern became giddy with the idea.

Too giddy to notice the other human rushing at him from behind, tackling Fern to the ground with a surprised yelp.

"Y/N?" Fern gasps at the sight of you pinning his arms over his head. "What a surprise! i was just heading to your house to ask you something." he smiles.

But you didn't return the smile.

"Don't play around with me Fern!" you growl.

"What are you talking about? it's me Finn!"

Anger flashes through your eyes, kneeing him in the gut. Eliciting a pained groan from the boy.

Fern shook the Finn disguise from his body, eyeing you incredulity. "How did you know it was me?"

You scoff. "I found an open notepad with your evil plan in it. Writing 'Plan to take over Finn's life' in big capital letters on the cover wasn't the smartest thing to do, ya know?" you shook your head in disapproval. "I'm here to stop you from doing anything you'll regret."

Fern raised his own legs and pushed you aside, tumbling on the wheat like grassland before regaining your posture.

"You think i'm evil?" Fern asked, an unrecognizable distortion coming from his voice.

"You straight up want to lock Finn in a stone dungeon! I don't know 'bout you, but that sounds kinda evil to me." you defend, extending an arm to the young man in a friendly manner. "Listen Fern, i know things haven't been easy for you, but this isn't the right way to solve it."

"You don't know anything!" Fern lashes out, snapping a vine-like arm in your direction like a whip.

You jump back in shock. Fern is your friend, you never imagined he would lay a hand on you. Feeling your legs tremble at the sight of sharp snake eyes replacing Fern's pupils. Something is wrong, this isn't the Fern you know. "Fern...?"

The grass boy struggled with himself. Angrily grabbing his vine arm, lowering it away from you.

"I don't want to hurt you (y/n), we can leave and act like none of this ever happened." Fern spoke lowly from between clenched teeth, like something was hurting him.

"Fern what's wrong...?" You held a hand on his shoulder, giving it a comforting squeeze. "Whatever it is we can figure this out together..." The gesture manage to ease him a little, his slit eyes growing back to his regular soft round ones.

"Together?" he replies hopefully. If you're willing to help him, then maybe...

"Of course, I'm sure Jake, Finn and Bonnibel could help-" you offer a sympathetic smile.

Fern grew tense at the mention of Finn, teeth growing sharp, along with thorns unconsciously spiking from his body. Hurting your hand in the process. You back off with a surprised yelp, holding your now bloodied hand with a pained expression.

"(Y/n)! i didn't mean too." Fern apologized, taking a step towards you, but it made you flinch.

Before you could respond there was a shouting coming from afar.

"You donked up!" Finn came out of nowhere and tackled Fern to the ground.

"Finn!" you shout.

The human boy didn't pay attention to you, one look at your bloodied hand was enough to enraged him, knowing Fern must've harmed you.

"So not only did you want to lock me up, you also hurt (y/n) too!?" Finn snarled.

"I wound never hurt (y/n)!" Fern replied with a hiss, sounding a lot like a snake.

The boy went at it against each other. Kicking, punching, scratching and even biting. It was like watching a pair of animals fight, it made your stomach churn.

You ripped a piece of your shirt as an improvised bandage, wrapping it around your hand before grabbing your baseball bat.

"Enough, both of you." you got in between the two brothers.

At some point they were ready to sword fight, Fern with the grass blade and Finn with his robot arm.

"You're acting like children! No wait, children atleast have some sense in them." you shook your head "Animals, that's the word I'm looking for." you spoke out loud with a stern voice, scolding the both of them.

"He started it." Fern pointed to Finn.

Finn had confusion splattered all over his face. "How did I started it? I was being nice to you!"

"I don't care who started it, this ends here." you lowered your bat. "We'll solve this like the young adults we are. Fern, why did you lock Finn in a dungeon?" you ask the grass boy.

"What? It's a nice place." Fern shrugs.

"Fern..." you warn.

"Fine, because I wanted him out of the picture and steal his life." Fern crossed his arms over his chest

"What the hell Fern, that's not very cash money of you." Finn called out.

"Okay we're heading somewhere. And why did you want to do that?" you ask.

"Because he thinks he's better than me! people like him, he's popular and charismatic. He has it easy just because he's Finn."

"Wha- Fern I don't think I'm better than you." Finn looks at the plant boy in confusion. "I know things have been rough for you, that's why I've been try to help you out."

Fern tensed up when Finn took a step forward, you noticed this, hence why you attempt to calm him down like an anxious cat.

"He's trying to help, the both of us are." you say in a calm voice.

Fern's slit pupils grew back into wide round ones. He kept staring back and forth between you and Finn, scared, vulnerable and confused.

"Even after what I did?" Fern asks fearfully, terrified of being rejected right there and now.

You turn to Finn, seeing the boy respond without hesitation.

"Yeah man... We all dunk up sometimes."

You inch closer to the plant boy, lowering the sword from his hand until it shifted back inside his body. It was then that you envolped your arms around Fern, giving him a nice hug and a gentle squeeze. Immediately raising his arms to return the hug.

"It's okay," you whisper, feeling Fern trembling in your arms. "You made a mistake. That doesn't make you evil." you reassure the young man, unable to ignore the way his heart beats just like yours.