A/N: Hey you guys heres a new story, this may be a little confusing so I warn you now. Marshall is Fionna so when I say 'she' I'm referring to Marshall. Hope you enjoy and please review.

Switched

"Fionna!" Cake yelled, "wake up and come eat your breakfast!" My sister called.

My eyelids fluttered opened and I yawned, swinging my feet over the bed, I stood and stretched. "I'm coming, I'm coming." I mumbled, the sleep still affecting me.

Crawling down the ladder carefully, I looked at Cake, "what's for breakfast?"

She looked at me strangely, "Marshall? What are you doing here this early? Where's Fionna?"

"What are you talking about Cake?" I asked her confused.

She waved me away, "just go wake her up and tell her to hurry."

I slowly turned around and crawled back up the ladder, what did she mean go get Fionna? Why did she call me Marshall anyway? I placed my hand on my forehead to see if I had a fever.

Wait...

I looked at my hands, my skin... WHY ARE THEY BLUE!

Okay, calm down Fionna, there is no way I couldn't possibly be in another person's body. Turning back around, I just hopped in the hole instead of taking the ladder again.

Cake looked at me, "is she awake?"

"Um... She's at my house... I'll go get her..." I said before hurrying to the door, swinging it open, a burning sensation surrounded my body and I hissed.

Right... Vampires can't be in sunlight.

"Where's the umbrella?" I asked looking around. My eyes landed on my light blue one that was hanging on the wall. "Be right back." I called as I flipped it open and ran outside. I didn't receive the burning sensation anymore, that was good.

Glob, if only I could float like Marshall did, how did he do that? He doesn't even have wings! At least I could sprint kinda faster than a normal human.

Soon enough as my thoughts passed, I noticed the cave. Thank glob I was finally here, now I can ask Marshall what the math was going on. Closing the umbrella, I set it down and opened the door.

It was dark and quiet, I walked and climbed up to his room and looked towards the bed. There was something there covered up, quietly walking up to the bed, I grabbed the top of the cover and pulled.

I wanted to try to tell myself this was impossible but it wasn't... I was laying right there!

"M-Marshall..." I whispered almost at tears. "Marshall!" I screamed, glob, my voice wasn't even mine!

My body flew from its slumber, she looked at me tiredly, "huh?" She wiped her eyes and looked at me again, "what the hell?" She noticed her voice, "what the hell!"

I watched as Marshall (Me) shoot up out of the bed and entered the bathroom. A girlish squeal was heard, "why am I in Fionna's body!"

Well I took this much better than he did at least.

She popped her head out of the door, "Fi? Is that you? Why are you in my body?!"

I shrugged, "I don't know! I thought you knew!"

"No!" She suddenly laughed.

"What?" I asked confused.

She smiled and looked into her shirt, "I always wanted boobs..."

I blushed and glared at him, "quit looking at my boobs you perv!"

"They are kinda small though..." She complained.

"Oh Glob, that means..." I started. "I have your parts too..." My stomach suddenly growled, right now wasn't the time.

"I'm human again..." Marshall said slowly. "I have a heart beat again..."

I sat on his bed and stared at the ground, "Marshall... I can't do this... I cant even go outside without it hurting!"

"Welcome to my world..." Marshall mumbled.

"We have to break whatever spell that is on us!" I explained shooting up.

She shrugged, "I kinda don't want to Fi... I'm sorry but a demon like me doesn't get another chance like this." She waved before quickly dropping down the ladder, I heard a door slam shut.

"He doesn't want to change back? The Marshall I know wouldn't do this... or maybe I just don't know him as well as I thought.

I sat back down and cried for a little bit. What was I going to do?

My stomach growled once more and I stood up and made my way downstairs to the kitchen. Opening the fridge, I noticed it was full of red food. I pulled out an apple, "he just sucks on it right?" I sucked it and nothing happened. Then I bit a piece and swallowed it, didn't taste right. Then I just bit into it and to my amazement, the color red quickly disappeared.

Mathematical.

I smiled, I guess if Marshall could have fun with my body then I can have fun in his.

A/N: So could you follow good? Hope you did because this is going to be a pretty good damn story. Well actually I don't know that but I know you will enjoy it! Well I don't know that either... Hope you enjoyed...