Alright, I've decided to make this into a series

It restarts each chapter if the problem isn't solved by the end of it

It started out simple. Marshall had met Fionna on a double date with his girlfriend and Gumball. Marshall couldn't say that he loved her from first sight, because he didn't. He thought he loved the girlfriend he already had, until they broke up because of her lies. Fionna broke up a little while later since Bubba was lame. He wouldn't even kiss her until their fifth date! And never held her hand in public. Marshall was single and happy, but missed having a girlfriend. And Fionna was depressed because of Gumball. She thought she was unattractive since he never tried anything, and Cake was always telling her she needed to lose weight. But Marshall thought she was beautiful. His ex's lies and love weren't clouding his mind anymore, and he couldn't resist Fionna. He started just stopping by the tree house to say "hello", but Cake drove him away. Then he came by their home for stuff, red food, random items from the house, a blanket, paint, etc. But eventually they ran out. Then Marshall had to ask.

"Hey Fionna." "Hey Marshall! What's up?" She was so beautiful. Marshall found Fionna walking around in the forest one night. "I should ask you that, why are you out here alone?" "Just going for a walk, trying to clear my mind..." She sighed, still depressed after Gumball. "Oh... cool. Anyway, I wanted to ask you something." Fionna looked up at the floating vampire. "Alright, what?" Marshall got shy. This was very rare for him, but he had fallen for the virtuous beauty that is Fionna. "You... wana go out some time?" Fionna thought about it for a second. "Look Marsh, you're great but... I'm still depressed after Gumball and don't really think I can handle another relationship right now." Marshall wanted to punch Gumball. Glob, that guy ruins everything! "Okay... hey, if you ever want to talk, I'd gladly listen." He said with a smile. He did genuinely care, he was worried about Fionna. He noticed a few more scars on her wrists than normal, and she was getting more secluded. But what Marshall had said must have been what she needed since she smiled, gave Marsh a hug, then said "Thanks Marsh, I will." And Marshall smiled too

"Glob Marshall, no one is going to like me! I'm ugly." "You aren't ugly! I think you're beautiful." Fionna smiled, then hugged Marsh. They were chilling on a cliff over looking the ocean. It was midnight and the moon's light was shimmering off the waves. Marshall didn't see Fionna much in the sun, but liked to think the moonlight off the waves looked better on her. "Thanks Marshall." "No problem." They went back to laying back and looking at the ocean. Fionna glanced at her watch, "ugh... Time for me to go. See you tomorrow." She Marshall another hug. "You know I'll always be there to listen." He whispered. "I know, thank you." And she left.

Almost a year later and asking Fionna out three more times to no avail finally gave results. "I want to be with you Marshall, but what about Flame Prince?" "That pothead loser hasn't asked you out for two months, I've asked him about asking you out the first month and he said 'I know, I will soon'" Marshall had asked Fionna out again, since clearly FP wasn't getting any where. Fionna liked FP and told Marshall about it. Marsh wished he could be the one to be with Fionna, but her happiness mattered more to him. Marshall had helped Fionna out of her depression, and she was finally looking at guys again. "I know but... What if he does?" Fionna responded. Marshall got an idea, "Y'know what? You're right. How about we just do a trial thing?" Fionna looked confused. "How about we just try being friends with benefits?" Marshall explained. Fionna perked up. "That's... perfect! But only for kissing and stuff, okay?" So Fionna and Marshall began setting the rules for their relationship. No sex, don't tell anyone, and if Flame Prince does ask, Fionna and Marsh are done. "Deal" Marshall said, and they sealed it with a kiss.

A month of doing things Cake wouldn't approve of later, Marsh couldn't resist any more. He loved Fionna, and had to tell her. Flame Prince still hadn't asked Fionna out and she was finally starting to give up on him. She found a different guy, a great guy. Marshall could be himself around Fionna, and she was the same way. They brought out the best in each other. And Marshall loved being around Fionna, and couldn't hide his feelings any more.

They were sitting up in a tree at sundown. Marshall was out since the sun couldn't do anything at this point. Fionna loved seeing him in the day, and thought the sunlight looked good on him. "Hey, Fionna?" "Yeah?" She looked up at her special vampire friend. "I love you." He lowered his gray eyes down to her blue ones. She closed those big deep blues and kissed Marsh. She smiled, then put her head back down on his chest. Marsh was confused. "Do you love me back?" "I... I don't know Marshall. I just... don't know yet." "Oh." And it was silent for a while. Fionna and Marshall started making out, but he thought that was just to take his mind off of what Fionna had said. Then she stopped, looked into Marshall's eyes, and said the sweetest thing he ever heard. "I love you too, but you need to work on your tongue kiss." Marsh smiled and gave a playful hiss with his long forked tongue.

A week later, everything was going to change. It was Heart's Day and Marshall got a great gift for Fionna. They had decided to finally go out as a full real couple, and Marsh thought something was needed to commemorate it. He went to the Fire Kingdom and had a beautiful ring made. It was silver with squares in a line for diamonds all around the ring. He wasn't marrying Fionna, but it was something to show she was his. He got the diamonds, and was off to meet Fionna at the Heart's Day ball in the candy kingdom.

He arrived wearing a black suit jacket, red suit vest, black button down, and a red tie with black pants and a black with red pin-stripped fedora. He looked pimp to say the least. Fionna was gorgeous in a medium length black dress that had red swirls. She looked like a black and red angel to say the least. Half way through the party, Marshall couldn't wait any longer. He dragged Fionna away from her friends and to the side of the dance floor. "Now that we're alone, I can give you this." Marshall pulled out a little white box. It had been red at first, but Marsh got hungry and didn't want to eat his suit. Fionna opened it and slipped on the ring. "You wana go out some time? "Glob Marsh it's... it's amazing! Yes! Thank you!" They hugged and walked over to the staring Gumball. "Guess what Bubba! Me and Fionna are going out!" Marshall said pridefully. Gumball smiled, "Oh thank Glob, I thought you had proposed for a second. Lets hear it for the new couple!" The candy monarch yelled to his delicious subjects. A loud cheer rose up and Fionna and Marshall partied the night away.

So, here is some back story

This story is important to me, but don't hold back with the reviews

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Also, check out "The 3 lives of Finn the Human"