It's not like Marshall Lee to seek entertainment from others beyond scaring the snot out of people for his own enjoyment, but when it comes to Fionna, he sees that she's got a lot more entertaining things about her than he first thought.

Marshall Lee awoke with a deep yawn and a long, comfortable stretch before he slowly sat up in his soft bed, the blanket sliding down his bare chest and pooling around his waist. He always slept in just black boxers, but he'd managed to fall asleep that day in his jeans while playing his guitar late into the morning. He'd struck on a nice sort of crooner tune, but he couldn't come up with words for it. He looked around slowly, taking in the sight of his old room. He'd owned the treehouse and this pink-sided, brown-roofed cave house for at least a century. He'd built both of them and rebuilt them a couple times, but he much preferred the house in the massive cave near Red Rock Pass. It wasn't too far from his favorite haunts. Quite literally. Being only a short flight from the Candy Kingdom to the east, the mountains to the west, and the plains to the southeast. He also enjoyed seeing what that weird little adventuress and her cat were up to sometimes. Mostly hero stuff.

He sat up with a sigh, glancing to his window which faced the cave's southerly exit. It was nice, since the sun never shone into the cave and windows at any time of day. He judged the pink blush on the horizon to be the setting of dusk, so he took his time in pulling on his grey plaid shirt and a clean pair of jeans and his black pointed shoes. He felt like being a little more stylish, but it wasn't like anyone would see him. He walked into his bathroom, and for about the millionth time since he'd moved back into his little house, he wondered why the heck he had a mirror, and why he'd even bought it in the first place. It wasn't like he could see himself. The only thing that could reflect him was water, and he still hadn't figured that one out yet. He spent about ten minutes brushing his hair until it was just right, then he messed it up and clawed it into place with his fingers so he'd achieved his usual look, then he made his way down the ladder from his room to his living room, guitar in hand. He lounged in the air inches above the couch, replaying the tune he'd come up with that morning, humming along, but still no words would come.

Eventually he abandoned the guitar on the couch and fetched a bowl of red berries and an apple from his fridge. Even though apples were his favorite, he had been addicted to strawberries for about three decades after not having liked them much his whole life. Maybe they'd just gotten better with time. Quietly, he sucked the red from the berries, even munched properly on a couple, and he left the colorless fruit behind to use as compost for his plants around the house. He might've been a vicious creature of the night, but he could appreciate a little green to liven up his home. He gladly welcomed his white long-haired cat Schwable onto his lap as he lost himself in thought. What would he do that night? Terrorizing candy people was getting boring, and he couldn't get the tune out of his head from his guitar to play anything else… perhaps a little visit to his squatters at the treehouse?

"What d'you think Schwable? Should I visit the bunny-girl and her cat?"

The perfectly-normal looking white cat stretched luxuriously and added a tiny 'mew' at the end. Marshall Lee chuckled and scratched her ears lightly. "You're some help. Y'know, you're lucky you're cute for a zombie." He set her down on the couch before floating lazily to the kitchen again to set out her food- usually comprised of some kibble and whatever red meat he'd sucked the color out of. She seemed to enjoy the colorless stuff more, maybe because it tasted rotten and she was a zombie-cat.

By the time he finished putzing around doing pretty much nothing, it was just past twilight. He made his way out toward the plains, and it wasn't a half hour before he came upon the treehouse and found all the lights still on. Sure, he figured, it's only just after sunset. Knowing a kid like her, she'll sleep all morning and wake up way past noon. He flew up to their living room window, spying as Cake and Fionna climbed all over each other trying to distract the other while they competed in a video game on a little green computer-thing that Marshall Lee had learned was called BMO after his nights of spying. He knew they'd think it was creepy if they knew, but it was pretty normal for him by now, just part of keeping himself entertained in his eternal life. Stuff got boring pretty quick when you'd lived for a thousand years. You'd seen it all after a century. But Marshall Lee had never met anyone like Fionna, not even the bravest of warriors that had challenged him and died in the past. She was different, somehow. He just wasn't sure how at the moment.

Finally, he flew up to where a boat sat on a branch with an umbrella over top, and he floated just above the umbrella, strumming the tune he couldn't get out of his head on his guitar. Maybe if he kept playing, he'd get bored and it'd either go away or expand into a real song. Right?

He wasn't sure how long he was playing, nor did he realize how loudly he played, until he heard a door open and shut below him, and soon white bunny ears appeared at the edge of the boat, followed by a long tuft of blonde hair and a quizzical expression that grew curious as Fionna climbed into the boat and stood below Marshall Lee, watching him.

"What?" Marshall asked with a glance out of the corner of one eye at her.

"You're playing your guitar on our roof."

"Yeah."

"In the middle of the night."

"Yep."

"Why?"

"'Cuz I can."

"Says who, Mr. Vampire King?"

"Says the Mr. Vampire King you're talkin' to."

"I still say you're a real wad."

"And I say you talk awfully big for a little goody-two shoes who got her butt handed to her."

Fionna huffed impatiently and Marshall Lee smirked. "What d'you want?"

"Who said I wanted anything? I'm just jamming."

"Okay, then what's the song called?"

"Why do you care?"

"I don't have to like you to like music. What's it called?"

"… I dunno yet. I don't have any lyrics for it."

"Are you gonna make up any?"

"Maybe."

"Okay." Fionna took a seat on the bench in the boat and stared up at him attentively until he finally looked down at her and stopped playing.

"What?"

"I'm just listening."

"You're killing my vibes, man," he grunted before he picked the tune up again.

"Okay, how about this?" Then Marshall Lee got a big surprise that made him smile, when Fionna began a slow rhythm of beatboxing to the tune.

"Whoa, whoa, hold up, girly. You can beatbox?" He stopped again and faced her fully, sitting up in his floating position.

"Don't call me 'girly'. And yeah, I'm okay at it."

"That's awesome," Marshall Lee declared a little more excitedly than his usual 'I-don't-care-about-anything-in-the-world' attitude normally allowed.

"You think so?" Fionna blushed lightly at the unexpected praise.

"Totally. Hey, give me good fast beat, 'kay?"

"Uh… sure." Fionna shrugged with a smile and picked up a quick beat that she could dance to, and Marshall Lee struck up a few chords before finding what he wanted with a fanged smirk of gladness. Finally, he was out of the rut of that slow tune. He began to improvise until he found a proper musical theme to the song, and then the words flowed the way they usually did, unabated and awesome to his ears and those around him.

"Runnin' around like everyone's pet,

Haven't you figured it out yet?

You're just a goo-oo-oo-die two-shoes!"

"Hey!" Fionna stopped beatboxing, but Marshall Lee kept playing and she took his invitation to throw in her own bit. He was sure she couldn't improvise, but she showed him just how wrong he was.

"Flyin' around like you're too good to care,

Marshall Lee, are you even aware?

You're just a ba-aa-aa-die two-shoes!"

Marshall Lee found himself laughing and she picked up the beat again, motioning for him to continue.

Even though that's true,

Little girl, I tell you,

I may be bad, but damn I'm good.

That's right, little honey bunny,

Even if you think it's funny,

I may be bad, but damn I'm gooooood!

Even if it was short and sweet, when the two finished at the same time they both burst out laughing not only at each other, but themselves. Marshall Lee had never made such a ridiculous snippet, and Fionna had never done much improvising when it came to music, but they'd boht loved it.

"Hey, you know what?" Fionna spoke up as they both quieted with smiles on their faces.

"Hey, no, I don't. What?" Marshall answered with a grin as he turned upside down to look at her.

"You're not so bad, Blackie."

"Not so bad? Hah!" Marshall Lee snorted. "I'm the Vampire King, bunny!"

"Don't call me bunny," Fionna pouted but couldn't help a smile.

"Then don't call me Blackie, I'm not a bat," he teased.

"You were."

"Psh. Anyway, I wanna ask you something," he turned right-side up, and though he didn't mean for it, a softer smile came to his features.

"Uh… yeah?" Fionna asked quietly, wondering what the vampire could possibly ask of her.

"I'm getting a little stale on my own in the music department. You wanna get together and, y'know, jam sometime?"

"DON'T YOU DARE BE ASKIN' MY BABY SISTER ON A DATE!"

"CAKE!" Fionna had never blushed so hard in her life.

"I'm not asking her on a date, furball, I'm asking her to come and play a freakin' jam session!" Marshall Lee yelled back, and he nearly snorted in laughter when the cat's brown and white ears and slitted eyes poked up above the edge of the boat, glaring him down. "So what d'you say, Fionna?" Marshall looked back to the red-faced blonde.

"I can't play anything really…"

"You can beatbox, and you can obviously sing, that's plenty."

"Okay… but on one condition."

"Oh, boy…"

"You have to teach me to play something."

"Oh. Alright. Sure."

"What?"

"What, what?"

"What'd you think I was gonna ask?"

Marshall then flashed her a smirk, "I thought you were gonna ask if kitty-cat could come with you. That's a deal-breaker."

"Like Glob I ain't comin'! Someone's gotta keep your clammy hands off her!"

"Psh, like I wanna do that."

"What? She ain't good enough for you?!"

"Oh, Glob…" Fionna sighed and put her head down as the two shot snide comments back and forth over her. This was going to be a long night.

Huzzah! I love dialogue, leaving the reader to imagine the situation and whatnot. I wish I could give you guys a tune for the song, but hey, half the fun is your IMAGINATION *rainbow*.

-Taiylor Wallace