Disclaimer: do I own Adventure Time? No. Adventure Time owns me. O.O

A/N: I'm sure you'll all love this chapter. Especially my attempt at putting beatboxing into text. Aw ye. Bz, bz katz.

As the day progressed, Finn became more and more bored.

"Maeceline... why should I stay away from the windows?"

"Marceline... what am I supposed to do without any monsters to kill?"

"Marceline... am I allowed to eat stuff from your cupboard?"

His questions kept coming and Marceline responded to each one of them with either a terse "Shut up, Finn." or a "Figure it out yourself."

He sighed. "Why can't I look out of your windows, Marce? It's not like there's much out there, except... cave."

Ignoring his question completely, Marceline decided that she should at least give him something to do, and asked him if he wanted to be part of her new track, beatboxing in the background - albeit with no credit. Finn, being the enthusiastic teenager he was, agreed quickly.

"Alright," Marceline told him, "just throw down a beat and I'll see if I can think of any chords with my axe bass. I won't record yet - just start throwing it down."

Finn nodded. "Bz, bz katz, bz bz bz, bz katz, katz, bz, bz katz, bz bz bz..." he started to repeat. Marceline tested a few chords here and there - C Major, G Major, F Minor, until finally deciding to start on a slow strumming of a C chord. Writing some melodies and other chords down on a scrap piece of paper, she mused over the musical knowledge held inside her head.

No minor chords, she thought. Beatboxing and minor chords never went well together. Some diminished chords maybe...? Hmm. Marceline really enjoyed writing music. It allowed her to think. And not just about the music - about love, hate and everything in between. Writing music was Marceline's escape from the world, just as Bonnie's science was hers.

Bonnie.

She smiled happily at the thought of her best friend, going about the affairs of the Candy Kingdom. About how adorable her mannerisms were, and about how everything about her was perfect. None of these thoughts had Marceline voiced to anybody, of course - if anybody knew how she felt about the princess she would be ridiculed and probably banished from the kingdom. She grinned wider than before, the glint of mischief back in her eyes, the small moment of depression gone, and leaned back over her musical score.

"You okay, Marce? You look pretty deep in thought there..." a voice behind her cut through her happy reverie as she realised that Finn had stopped beatboxing. She turned around and nodded, the slight curves on the edge of her mouth evident.

"I was just thinking."

Finn gasped. "Are you... smiling? I didn't think the Vampire Queen had any settings other than depressing!"

Marceline laughed a little. "Enjoy life while you can, Finn - it only gets harder from where you are." she grinned.

Finn looked at her strangely. "What were you thinking about?" he asked.

"Oh... nothing. It doesn't matter." Finn breathed in to reply, but at that moment a strange sound rose up from the bottom of Finn's house.

"Ffffiiiinnnnnnnn!" it said.

"What the what?!" Finn said to himself. Marceline looked as confused as the teenager was. A stretching sound emitted from below and suddenly a yellow face appeared in the window. Finn jumped in surprise, while Marceline simply shook her head and continued to strum her axe bass. "Jake?"

"Bro, we gotta go," Jake said breathlessly. "Somethin's up at the tree fort." Finn's eyes widened, filled with excited anticipation at what was to come.

"See ya later, Marce!" he fistbumped her and jumped onto Jake's back. "What's going on, dude? What's happened at the tree fort?"

Leaping through the open cave entrance and sprinting towards their home, Jake replied, "there's some dude sitting at the top of it. He looks like a vampire, bro."

"A vampire? But... isn't Marceline the only vampire left in Ooo?"

"In Ooo, maybe - but dude, there are other places than Ooo on this planet. Ooo is just a continent."

Finn's eyes widened. "Oh yeah! I've heard of Aaa and Eee! Like when the Ice King locked us in his tower and forced us to listen to his fan-fiction... eugghhh." he shivered, remembering the cringe-worthy writing of the Ice King.

Jake shivered with him. "But see, dude," Jake said, after recovering, "I think that Aaa is real! What if there are versions of us, but the opposite gender? What if Marceline isn't the last vampire?"

"But... how would people from over there get over here? There's no way he could have swam all the way here, is there?"

Jake shook his head. "I don't know man. I don't know." The tree fort loomed up in the distance, now seeming more menacing than it ever had been before.

"Alright, bro," Finn said to Jake, "let's do this."

"Stealth?"

"Stealth."

Jake silently stretched down to normal size and Finn jumped off his back. The two kept close to the ground, army crawling to keep a low profile. By now, the sun was setting in the west of the Land of Ooo, and it was becoming twilight. It was much easier to be stealthy at this time than in the morning. Finn backed up against the well, while Jake backed up against the yurk. Finn looked at Jake and put his finger to his mouth. Listen, he mouthed as a strange expression came across his face. Playing in the background was an electric guitar and - was that someone rapping over the top of it?

"-no you don't ever see me cry, but if you were to see inside my head you would die, and if you motherfuckers make fun of me cause I'm bi, then you can go fuck yourselves cause I'm the one who will fly."

Who is that? Jake mouthed to Finn.

Nobody I know... you could be right... Finn mouthed back.

He made a "I'm going over" signal with his hand and silently sprinted into the fort, keeping as low to the ground as possible. The voice sounded like it was coming from their attic. He tiptoed over the floor, making sure to be as quiet as he could. He avoided the floorboard that always creaked - that needed to be fixed - and silently took BMO's battery out so that he wouldn't make any sounds that might compromise his position. He carefully tiptoed up the tree forts steps, again avoiding a creaky stair.

Finally making his way up to the atticthrough the weapon room and using the bucket to pull himself up, Finn quickly hid behind the door. He peeked around, and there was the rapper. He was a grey-skinned, black-haired boy. Wearing a red plaid shirt, brownish-white trainers and jeans, you could almost have believed that he was a regular boy; if not for him levitating, his skin colour and, as Finn noticed, the bite marks on his neck.

The boy turned around and hissed. Finn had tried to hide behind the door once again, but had not been quick enough.

The vampire had seen him.

A/N: Did you enjoy this chapter or have any tips for my improvement? If you did, please review it; I'm always looking for feedback! And if you're one of those people who just sit and read, and don't review... Senpai notices you ;P