This fic will be composed of short chapters, lotsa fluff, a couple kinda iffy intimate-ish scenes, and your daily dose of Finnceline. Sorry about the short chapters part.

Disclaimer: Nope. Wait lemme check…sorry guys, I don't own Adventure Time.


"Hey Marcie," Finn strolled into his vampire friend's home without knocking. She set down her ax bass and smiled.

"Hey Finn. What's up? And don't say the ceiling," he stuck out his tongue.

"Fun-sucker. Nah, Bubblegum's making me go to some Triathlon Date thing with a fancy dinner followed by a movie and some late-night dance, but she's already got someone to go with. Flame Princess isn't talking to me right now, so I figured I'd just ask you," Marceline laughed so hard that she had to double over.

"Oh you've got to be kidding! You're not kidding? Finn, I'm flattered and all, but the Triathlon Date really isn't my thing. It's also not something for," she pointed between herself and Finn, "us. Friends," he scowled.

"Yeah...but PB's making me go."

"'Course she is," Marceline rolled her eyes.

"And I figured that you'd like to go...it would bug her, after all…ya know, you being there," Finn pointed out.

"Well on second thought..." Marceline reconsidered with a smile.

"Yes!" Finn pumped his fist.

"But you have to ask me ask me," she said.

"How do I do that?" the hero was confused.

"Just say, 'Marceline, will you go to the Triathlon Date with me?' just like that," she said, smirking.

"Okay," Finn shrugged. "Marceline, will you go to the Triathlon Date with me?"

"Sure Finn. What the—?" Marceline shielded her eyes from fire. When it died, her father was standing in her living room. "DAD!"

"Hello Marceline. Hello Finn," he said, smiling.

"Dad, you can go. Finn's just my friend," Marceline rolled her eyes. "I thought it had to be a romantic thing for you to show up..."

"WHAT!"

"Look Finn," Marceline sighed. "Part of my agreement with my dad was that he'd go to the Nightosphere and stay there if he got to come out whenever I went out on a date. Except that this ISN'T A DATE!" she shouted at her father, who just kept smiling. The Vampire Queen crossed her arms in a manner that wasn't childish at all. "Hmph."

"Now now Marceline. You know that I was already suspicious after the movies. Now I need to speak to this boy."

"Okay fine. But I'm staying in the room this time...I don't want you sucking Finn's soul like you did to that one guy."

"WHAT!"

"Oh alright. I can see how much this boy means to you," Marceline blushed.

"Dad!"

"Now let's all sit down," the three of them actually sat on the solid couch, with Finn in the middle. "Finn, have you heard about the birds and the bees?"

"Huh?"

"The banana and the donut?"

"Come again?"

"The—?"

"Dad. He knows about sex. Let's just get this over with," Marceline rolled her eyes. Finn turned bright red. That was what they were talking about?

"Uh..." he tried to move for the door, but Marceline grabbed his wrist and dragged him back down.

"Oh get back here you weenie! If I have to sit through this, so do you," she scolded.

"But you don't have to sit through this!" he protested.

"Oh yeah…" she pondered.

"Now Finn," Marceline's dad began, cutting off any more escape attempts

"Hey, that's the tone you use on me! He's not your kid, use a different tone!" Marceline shouted.

"Fine," he changed his tone slightly. "Finn, I knew this day would come. You and Marceline are so close that you would eventually do something like this, so—"

"Something like this? Dad, what are you implying here?" Marceline interrupted again.

"That you and Finn would eventually go on a date. As I was saying—" he tried to continue.

"It's not a date, Dad!" Marceline told him, blushing. "We're just going as friends!"

"Oh Marceline, everyone knows you can't do the Triathlon Date as 'just friends,'" the ruler of the Nightosphere leaned across Finn to ruffle his daughter's hair.

"Yes you can! That's what we're doing," Marceline insisted.

"Well good for you," her dad replied in a tone that clearly said "I don't believe you one bit." "Now back to what I was saying. I prepared myself extensively for this day, just for you, Finn! Because my daughter is so fond of you—"

"And what exactly does that mean?" Marceline put her hands on her hips, although she was still sitting down.

"I can tell that you like him very much," her father said simply. Marceline blushed. "Continuing onward...Finn, we need to talk...well I didn't expect her to be in the room..."

"Hey!" Marceline protested angrily.

"Well, we need to talk about you," her father explained.

"What?" Marceline asked in disbelief.

"I need to tell Finn about you so he's fully prepared for anything that might—"

"Oh come on Dad. What could happen?"

"Macaroni and tomatoes. You're allergic, remember? Or you could get hungry and go into bloodlust, be exposed to sunlight, accidentally ingest garlic..." he counted them off on his fingers. Marceline turned red.

"Okay okay I get it!"

"What's up with garlic?" Finn asked.

"If it's on something red and we accidentally eat it, things get freaky," Marceline explained.

"Oh..."

"And Finn would have no clue about what to do," her dad pointed out. Marceline sighed.

"Fine Dad, tell him."

"About...?"

"Everything," she hung her head.

"Yes!" her dad grinned in triumph and looked at Finn. "First item on the list; garlic. If you notice that her skin is starting to look brownish, ask if she can speak. If she shakes her head and glares at you angrily, you know she's somehow eaten garlic. What you'll need to do is a simple maneuver used on choking victims; garlic literally can't pass past the throat. It swells and turns into these huge white balls that will destroy us if they grow big enough. Have you ever heard of the Heimlich Maneuver?" Finn shook his head. "Abdominal thrusts?" Finn shook his head again. "Okay. Marceline, stand up."

"Dad, he knows...!" she sighed at the glare he gave her and stood. He moved behind her and put his arms around her, positioning his hands at the base of her diaphragm. That looked familiar...

"Now you try, Finn," he stepped back. Marceline glared at her dad disbelievingly, and Finn nervously stood.

"Sorry Marcie, but your dad scares me," he apologized.

"It's cool," she said with a smile. He stepped behind her and wrapped his arms around the vampire, trying to position his hands the right way on Marceline's foreign frame.

"Excellent!" Finn stepped back immediately. "Now had this been a real situation," Marceline's dad said as they sat back down, "you would have had to apply pressure with your hands," Finn gulped as he remembered what he had done with the bear. He might have to do that...with Marceline? And it had a name? Whoa. His brain was on overload. "Vampires are also allergic to garlic, but we'll get to that later. Next on our list; the obvious threat of sunlight. If she's exposed to sunlight for a long time, Marceline can die. You have to shelter her in any way possible. Do you understand?" Finn nodded. "If she starts trying to drink blood, just shove something red under her nose. That should snap her out of it. If it doesn't, knock her out and bring her back here. By the way, I'll be waiting here for you. Five in the morning sharp, she'd better be back."

"...You're a terrible dad," Marceline voiced her thoughts.

"Finally, we reach her one sole allergy other than garlic. Macaroni and tomatoes. If she 'accidentally' sucks the red from some tomatoes that have been on macaroni—"

"What's that supposed to mean, Dad?" Marceline asked sharply. Her father just chuckled.

"As I was saying...you'll have to do CPR; chest compressions and mouth-to-mouth if she's not breathing," Finn and Marceline turned red. "Also, I have a stock of anti-allergy vampire medications, in needle form. You may have heard of epipens...no?...well in any case, this is kind of like those," he produced a needle with a cap on it. "To use it, just push this button," he pointed to a small button on the side of the needle, "and jab her in the thigh," Finn and Marceline both blushed again. "Leave it there for a few seconds, then pull it out and gently rub the area. For no longer than a minute, or I will steal your soul."

"Dad!"

"Heh, I'm just kidding. Not," he whispered in Finn's ear. The hero gulped.

"I have the ears of a bat, Dad. I can hear you," Marceline pointed out.

"Eh," her dad shrugged. "Now onto the important subject..." Finn gulped again, but Marceline just sighed heavily. "Finn, I need to lay down a few ground rules about Marceline. Bring her home before five, perfectly intact with all of her clothes and no rips anywhere."

"Sure," Finn shrugged. This wasn't too bad.

"Also, if I see a hickey on her, I will steal your soul."

"Uh..."

"Dad! Finn would never do anything like that!" Marceline protested. "Why don't you just let us go and stop being such a big fat—"

"You see Marceline, this is why I never let you sit in on my talks," Marceline's dad said.

"Why?"

"Because you don't let me talk! Now hush!" he exclaimed angrily. "Also Finn, don't let her have red wine. She gets a little tipsy."

"Okay."

"Ugh."

"Stay away from druggies."

"Whatevs."

"Like we'd be near them in the first place!"

"And also, a few rules about sex."

"Oh here we go..." Marceline muttered, blushing.

"If you go past kissing, I will find out. I don't want you feeling her up, undressing her, sleeping with her, nothing. You may kiss her; on the cheeks, forehead, and mouth," Finn was the reddest he had ever been. Which was pretty red, considering that he had once seen Marceline naked.

"Dad, sheesh! We aren't going to do anything like that!" Marceline rolled her eyes. "So let me go upstairs and change into what I want to wear, and you can wait here for us to get back."

"Sounds great!" her dad said happily, standing up. Taking this as his cue to leave, Finn scrambled out the door and leaned against the house, panting. He could still hear Marceline and her dad.

"Aw, Dad! You scared away my date!"

"I thought you said it wasn't a date?"

"It isn't! It was a figure of speech! ARGH! I'm going to get changed and find Finn."

"Whatever you say, Marceline!" Finn looked up at the setting sun with confusion in his eyes. He wanted to go with Marceline...as friends.

...Right?

As he pondered the subject, he heard the door open beside him. Turning, he saw Marceline.

And his jaw dropped.

She was wearing a fitted black gown that simply cascaded down her figure, flowing gently over her curves to settle in the most flattering way possible. The hem touched her ankles, revealing simple black flats. The sash on the dress was a medium crimson one, and it went around her waist in such a tight way that Finn knew it must not have a tie. The neckline of the gown was a straight-across cut, as it was strapless, and revealed just the slightest bit of cleavage, not nearly enough to be raunchy or promiscuous. In the vampire's hand was a necklace; a marcasite chain. When she held out her fist and unclenched it, a beautiful pendant lay in her palm. Its setting was an elegant marcasite bat, wings spread wide, clutching a teardrop-shaped ruby pendant in its claws.

"For the sake of the event...and stop staring," Marceline said, a wry smirk tugging at her lips as she let the necklace trickle into Finn's hand and turned around, holding her hair up to reveal her pale neck. Finn briefly eyed the back of the dress (he had been right about the sash); it was intricate onyx-colored lace until the belt of crimson silk. He was shaken from his daze by Marceline herself. "Well? Hurry up weenie, we don't have all night!" Finn blinked and gently slid the necklace about the vampire's neck. She shivered as the chain slid roughly over her bites, and he paused. Marceline shifted impatiently, prompting him to attempt to close the clasp, fumbling for a bit before he finally got it to work and seal in the opposite end of the chain.

"So..." Finn rubbed the back of his neck, a little embarrassed because he was still dressed in his regular clothes. Sensing this, Marceline rolled her eyes and took his hand.

What is she to me? Finn thought as his vampire friend bore him toward the treehouse. I know she's one of my best friends, but when I see her in that dress...I start...argh! I don't know anymore! I know she's beautiful—I already knew that—but I feel so...strange around her! What does it mean when my heart jumps out of my chest as she speaks? What does it mean when my words are lost before I can speak to her? What does it mean when my knees grow weak as I walk over to her? I know! I'll ask Jake!

Marceline set him down on the grass outside the treehouse.

"Be right back, Marcie!" he ran into his home. "JAKE!"

"Whoa, chill man. What'd Marceline say?" Jake walked out of the kitchen as Finn reached the living room.

"She's outside," Finn replied. "I need a suit," Jake walked over to the window and whistled softly.

"I know I have a girlfriend, and I wouldn't leave her for anyone, but as a completely unbiased opinion; Marceline is one sexy vampire lady," Finn blushed.

"Jaaake!"

"What?"

"Just find my suit!" he huffed.

"Aw, you're jealous!" Jake stretched upstairs and started searching through clothes.

"Am NOT!" Finn followed.

"Are too!"

"Not!"

"Too!"

"Not!"

"Okay. You're not," Jake shrugged. "But just remember man, I'm here for you," the dog produced a traditional penguin suit, no tie or bowtie.

"Thanks dude," Finn took the suit. Jake left the room, and he was free to change. After a brief struggle with the clothes, the hero found himself looking rather sharp and dashing, if he did say so himself. Smiling, he began to head downstairs, and paused. "Hey Jake?"

"Yeah man."

"What does it mean when your heart jumps out of your chest when you hear someone talk?"

"You got a crush," Jake answered in a slightly teasing tone.

Crap.

"When you get all tongue-tied?"

"You really got a crush."

Double crap.

"What about when your knees get all shaky and stuffs?"

"You really really got a crush!"

I'm so dead.

He looked outside and saw the object of his apparent affections smiling at him. His legs were already beginning to give.

"Ooh hey man, I've been savin' these!" Jake grabbed two boxes. Finn opened one to see a single red rose inside, seeming to shine under the moonlight. In the other box was a corsage made of a single rose in full bloom. Its petals were ebony, edged with bloody crimson. Finn gave Jake a grin and headed down to Marceline. She smiled at him.

"Ready to go?" the vampire asked sweetly. Finn's scattered brain searched for words.

I don't want to have a crush on one of my best friends!

"Not quite," he held out the flowers. Marceline's smile softened into a gentler expression. The rose, Finn tucked behind her ear. The corsage he tied around her wrist.

"Now it's a real date," she whispered in his ear, making him shiver internally. His heart in particular was fluttering like a baby bird.

No no no! This is all wrong!

"Finn?" Marceline's head was turned slightly to one side. He shook off the feelings.

"It's nothing. Let's go!" he tried to be excited, but she could clearly tell something was up.

"Listen, we don't have to do this if it makes you uncomfortable...I mean, I know my dad probably freaked you out..."

"Nah, he was cool. Let's just get going before we miss dinner," Finn insisted. Marceline gave him a suspicious glance, but shrugged and took his hand. Finn's pulse jumped, and they were in the air.

The first "event" of the date would be held in the Candy Kingdom; dinner. Marceline wasn't thrilled about having to journey to, as she put it, "Bonnibel's Lair," but said that she'd do it for Finn. This had made the hero with his newfound feelings blush.

"Marcie?" Finn asked as they landed.

"Yeah?" she motioned for him to continue.

"I'm scared."

"About?"

"Your dad stealing my soul," she laughed. "It's not funny!" he said defensively.

"Oh calm down, you weenie. I'll tell you when to worry about breaking his rules...basically if we ever get together."

"Oh. Okay then. Let's do this!" Finn exclaimed. Marceline laughed.

"Now there's the Finn I know!" they headed into the Candy Kingdom for the first part of their long night.


Isn't the first part just the best? I was actually gonna make it its own oneshot until I realized I'd probably get requests for the Triathlon Date and decided to just write this instead! Yay!