(A/N: Hey guys! I've been getting super into Adventure Time lately, and Fiolee has totally become my OTP. Anyway, I'm just fleshing out the next few chapters of like, a bajillion other projects, so yay! Starting things I never finish! Anyways, just enjoy!) By the way, Thinking=Italics.

DISCLAIMER: I own nothing. Adventure Time belongs to Pen and Natasha :)

The pouring rain and low rumble quieted the usually lively land of Aaa. The long downpour was usually a source of dreaded boredom for most of the kingdom's residents. Countless hours spent inside, waiting for the everlasting torrent to let up, as storms could last for days in such a unique place as Aaa. For some, however the rain was welcome. Such was the case for a certain 15 year old blonde heroine.

Fionna loved the rain. She would sit for hours on the ledge of her window and watch the torrent filter through the tree house canopy, listening to the distant thunder. Today was much the same, Cake had gone to Lord Monochromicorn's for a few hours, leaving Fionna alone with her thoughts. She sat downstairs, snuggled into the couch with a book and cup of coffee. Sipping from the large mug she lounged there, letting the liquid radiate warmth into her small hands.

Sighing contentedly, she freed her hair from it's usual white rabbit cap, letting the straight golden locks float down to her shoulders.

A loud knock at the door startled Fionna, who set her book down and slowly rose from the couch.

Huh. Cake's back pretty early...

Shuffling to the wooden door in her oversize sweater and comfy but skimpy black pajama shorts, the short teen rolled up on her toes to peek through the peephole. Peering through one bright blue eye, she saw none other than Marshall Lee, who was, despite being undead, visibly shivering from the cold rain. His midnight black hair hung in wet locks in front of his eyes.

Fionna swung the door ope, coming face-to-chest with with her vampire friend who although only 2 years older, towered a good 6 inches taller than the petite blonde. Seeing his best friend in a giant sweater with her hair down brought a small smile to the older teen's face.

"Fionna, that thing looks like it's gonna swallow you whole." he said gesturing to the large tan pullover that hung on her petite frame.

"Oh can it weenie." she teased, but stepped aside to let him in the house no less. "So what made you decide to visit?" she asked, walking past Marshall, who flopped over on the couch, on her way to the laundry room to retrieve a towel.

"Eh, this and that, plus the cave gets really echo-y during thunderstorms." he replied, shaking out his long black hair. Fionna emerged carrying a large forest green towel.

Marshall thanked her, taking the towel and peeling off the gray flannel shirt that was now soaked from the rain. "I'm gonna go put this in the dryer." said the tall noirette, pushing himself up from his place on the couch.

"O-Okay," choked out the blonde, blushing shyly. Wow, I did not see that coming, she thought, taking in the sight of Marshall's toned abs and broad shoulders. I never noticed how good looking Ma- wait! What the zip, That's your dude friend! Quit it Fionna!

As soon as she started recovering from the shock of a shirtless Marshall Lee, she remembered the pair of pants she had patched for said vampire a few weeks earlier. "Hey Marshie, I still have those pants I fixed for you. Wanna change?" Poking his head out from the laundry room, Marshall floated back over to the couch. "Yeah, dry clothes would be pretty math. Thanks." he replied, fist bumping his friend at the small favor.

"No problem, wait here," Fionna said, climbing up the ladder to the small upstairs bedroom she and Cake shared. Pulling herself up onto the ladder, she ambled over to the closet, rifling through the pile of clothes at the bottom. Spying the dark grey material, she pulled the jeans from the pile.

Satisfied, she turned to go back downstairs but stopped when she heard a slow, melodic sound filtering up from downstairs. Shrugging it off the heroine continued to make her descent down the wooden ladder. Hopping of when she reached the bottom rung, Fionna turned around to find Marshall Lee reclining back against the couch, feet propped up on the coffee table. The vampire had his axe-bass balanced on his lap, playing a slow, sweet melody. Fionna stood dead in her tracks, watching transfixed as Marshall's long, nimble fingers moved the strings on his guitar, his deep obsidian gaze half-lidded and focused. His deep, smooth voice hummed a song that seemed familiar to the petite girl, but she couldn't remember where she recognized it from.

Finding it extremely difficult to tear her eyes away from the shirtless singing vampire in her living room, she cleared her throat. Marshall's head snapped up, meeting her blue gaze with an intense onyx of his own. He smirked noticing the gray bundle in the little blonde's arms. "So, can I grab those now or do I have to play for you more?" he teased.

The girl blushed, but quickly righted herself again, sticking out her tongue at the older teen and handing over the pants. Marshall pushed himself up from the couch, floating down the hall to find a bathroom to change in.

Fionna, still flustered from her momentary falter earlier, decided a little extra pick me up might be in order. Grabbing her empty mug, she made her way back to the kitchen, brewing 2 fresh cups for herself and Marshall Lee. She busied herself, fixing the taller boys cup first, black with just a hint of sugar. Huh, kinda like him, she thought. Kind of bitter with a hidden sweet side.

After finishing with both large cups, the blonde picked up both and made her way back to the couch, setting Marshall's down to cool and taking a seat next to her companion's. After a few minutes of idle sipping, as Marshall was still in the bathroom, she submitted to curiosity, turning to examine the red axe-bass. She ran her fingers along the smooth lacquered surface, feeling the neck and strings, tracing over where she had seen the older's fingers strumming the eerily familiar tune.

Marshall Lee emerged from the bathroom, dry but still lacking a shirt, and after throwing the wet clothes in the dryer, floated back out to rejoin his female companion. To his amusement he returned to find Fionna carefully caressing the sharp edges of the unique guitar. Usually he would yell when he saw somebody touch his beloved instrument, but somehow the fact that it was Fionna made him feel...good. Like she belonged to him too. What the zip? Now you're talking crazy! Besides, she likes PG, not you. Shaking off the foreign feelings, he continued over to the couch. Settling onto the spot where his bass rested, he looked down to watch how the smaller girls delicate fingers traced so carefully over the strings.

Glancing back up to meet her gaze, their eyes met, both grinning.

"So." he began. "What goes on in the life of the great hero of Aaa?"

"Pfft, don't try to sweet talk me bat boy. And aside from the usual Ice Quern buns-kicking, just preparing the Gum-Ball with PG." The short girl said with poorly masked excitement.

"Ah, I see." sullenly remarked the vampiric boy, knowing full well just how much she was looking forward to the ball. And hanging out with that idiot candy-boy.

"Wha? You don't seem all that excited Marshie, who are you going with?" she questioned.

"Oh, I hadn't really thought about that yet. So I guess no one."

"Oh, well Prince Gumball asked me to show up, but 'just as pals'," she continued, "But I really don't have a DATE date." she said reproachfully.

Marshall Lee smirked, morphing into full blown laughter when Fionna caught sight of his expression, giving him an unamused frown that would make LSP proud.

"Look, don't sweat it. And hey, why don't we just go together? It can be as friends, whad'ya day?" the older boy asked.

"Oh Marshie, that's perfect thank you!" Fionna squealed happily, about to give the boy a huge hug, but stopping when she realized that would probably spill her drink everywhere, reaching down to give his hand a confident squeeze.

Marshall grinned, fangs peeking out from under his lip. " No problem, always here to help. Now, how 'bout that song?"

Nodding in approval, She returned both hands to her cup, humming hapily at the way the warm liquid felt in her throat. Smirking at her little cooes of satisfaction, Marshall pulled his guitar back onto his lap, starting the first few notes of a slow, sweet song he remembered. He sang openly, letting his walls down in a rare moment of vunerability. Fionna listened, entranced by this side of Marshall.

I love how your eyes close

Whenever you kiss me,

And when I'm away from you,

I love how you miss me.

Her light blue orbs softening, she unconsciously scooted closer to the singing vampire, listening to his angelic voice

I love the way you kiss is always heavenly,

But darling most of all,

I love how you love me

If Marshall could blush, he would have, suddenly aware of just how close Fionna was sitting. But nonetheless, he continued

I love how your heart beats

Whenever I hold you,

I love how you think of me

Without being told to,

He thought about just how much he loved the rare hugs he got from the small girl, how alive and warm she felt cradled against his chest.

I love the way your touch is always tenderly,

But darling most of all, I love how you love me

Fionna was swoon at the way his eyes burned with intensity, lids downcast and his graceful fingers strumming over the thin strings of his bass.

I love how your eyes close

Each time that you kiss me

And when I'm away from you,

I love how you miss me,

I love the way your kiss is always heavenly,

But darling most of all, I love how you love me

He wavered on the last notes, humming out a few bars and ending with a quiet final strum. Marshall's dark obsidian irises glanced up through his long black lashes. While Fionna watched, a few stray locks fell across forehead, framing her gentle features in a halo of gold. Marshall reached up, carefully tucking the stray strands behind her ear, letting his hand linger on her cheek, the stark contrast of his blue gray skin against her ivory and peach blush.

Fionna relished the feeling of her companion's cool fingers softly cupping her cheek. They stayed like that, an intense meeting of black and blue gazes between the two.

Suddenly, sharp crack of particularly violent thunder breaking the invisible connection between the petite human and lanky vampire. The tension from the passionate glances shared between the teens grew to a heavy awkwardness that hung in the air. Fionna stood up, mumbling something about having to use the bathroom and shuffled down the hall to the bathroom, closing the door loudly behind her.

Marshall let out a loud exhale, leaning back, sprawled out against the maroon-orange sofa. He thought about the new and unfamiliar feelings he had developed, towards his best friend nonetheless. And now he was going to the ball with the girl. Geez, just be yourself and show the lady a good time. She's fun, nice, adventurous, and really cute to boot, he thought, suddenly confronted with the fact that he might just have a crush on Fionna. Crap.

After shutting the door, Fionna slid down the back, sinking down to sit on the floor. What the cabbage? Since when do you have feelings for Marshall! she racked her brain, wondering how all of this could have happened. Well, he's sweet, funny, and pretty darn handsome.. she thought, coming to grips with the depth of her feelings for a certain black haired vampire.

After collecting herself, splashing some water on her face and saying 'I can do this' about a million times, Fionna decided to venture back out and at least act like things were normal.

Clicking the door shut behind her, the smaller girl went back to the living room, finding her friend in almost exactly the same position, wearing his usual satisfied half-grin; the only difference being that he had retrieved his shirt from the dryer and put it back on. Settling back down on the couch, both were relieved to find the air of awkwardness had dissipated.

"Hey, wanna play with Geemo for a little bit?" Asked the smaller blonde girl.

"Sure, why not." the other boy replied, both calling Geemo over and hunkering down for a few rousing games of Penguin Blast.

After a few more hours of playing video games, laughing, and the like, Fionna began yawning.

"Oh man, it's already 5 in the morning! No wonder I'm exhausted.." she said with another yawn.

"Well, I need to get home before morning anyway, and you need your sleep," Marshall replied, standing up and grabbing his bass.

"Alright." replied Fionna, standing up to wrap her shorter arms around Marshall's shoulders in a goodbye hug.

"Goodnight Fionna," he whispered next to the blonde's ear, circling his arms around her waist.

"Goodnight Marshie." she said, releasing her hold around his neck and watching as he turned, hopping through the window and flying off into the early morning dusk.

***Yaay! First chapter up! I promise more to come. Thanks for reading!