((The song Marshall Lee has written/is singing is Lonely Boy by Black Lab. Disclaimer: I own no rights to this song and you can hear the original song here at watch?v=HXUkr_5vUDg on YouTube))

They had decided to go to the Nightosphere tomorrow once everyone had rested up. That night Fionna got up to use the bathroom and realized Marshall wasn't asleep on the couch, so she slipped on her shoes and decided to look for him. Not far from her house she spotted Marshall sitting alone playing his axe guitar. Not wanting to interrupt him and curious as to what he was playing she leaned against a nearby tree.

As she watched Marshall leaned his head back and began to sing.

"You say

You like to sleep alone

And I say

I miss the way you breathe

You say

I get away with murder

But you know I've paid for hurting someone I can't leave behind

Do you feel something

Pulling you back in?

Do you see something

You wanna see again?

I could be the one

I could make it up to you

Take me back

I'm the lonely boy who-"

Fionna shifted her feet and snapped a twig, causing Marshall to spin around and look at her.

"Fionna?"

"Y-yeah sorry I didn't want to interrupt you…"

"That's fine."

In the dim light of the moon Fionna could see the slight color in his cheeks. He looked embarrassed.

"That was a great song, when did you write it?"

"Just then."

"I liked it."

"Thanks."

Fionna went to sit beside him and he brushed his hair back with a grin.

"You loved me so much you decided to spy on me huh?"

She punched his arm lightly.

"I saw you weren't there and I came to look for you."

"Worried I left?"

She blushed slightly. "A little…"

Marshall just shrugged.

"I won't leave. You want to help and it's kinda your job anyway so…"

Fionna felt her heart pounding in her chest. She knew this feeling but…she never felt it around him until recently when he came back and everything started being like old times again…

"Marshall?"

"Hmm?"

"You've been acting weird again you know."

"How so?"

"Well, you told Gumball to keep me away from you."

"So he told you that…"

"And you told me you don't want me getting hurt. When we first met you never said that, we fought together without you worrying and then you started saying things like that after a few years."

"I know what you're capable of Fi, you're powerful and all but I am your friend. I'm allowed to worry if I want to."

Marshall looked at Fionna's face, his blood red eyes meeting her sky blue ones. He took in the flush on her cheeks, the way she was looking at him with those big wonderful eyes…

"Marshall, was that song about me?"

"Why do you ask?"

"Oh I just uh…nevermind."

She looked so cute when she blushed like that. She always looked so beautiful…

"…Yeah it was."

"R-really?"

"Does that scare you?"

"I'm not afraid."

Her voice softened as he lifted a hand to her cheek, cupping the warm flesh and letting his fingers run through the long blonde hair that poured over her shoulders and shined in the moonlight. He leaned in till their noses touched and listened to Fionna's sharp intake of breath, felt her pulse racing under his fingertips touching her cheek. She didn't back away as his lips gently touched hers in a soft, gentle kiss. Fionna placed her hand on top of his, leaning into the kiss until they broke away and leaned their foreheads against the others. Her heart raced wildly as she opened her eyes, looking into Marshall's. He sighed and ran his fingers through her hair again.

"Fionna…You have no idea how long I've wanted to do that…"