AT belongs to Pen Ward.
It was a casual, sunny day in the Land of Ooo. A nineteen-year old Finn, walked up to the Vampire Queen's lair.
He had grown taller over the years. He developed a deeper voice, and his blue eyes were finally actually visible.
His blonde hair grew to be longer and spiky. When he was 15, he found out FP was cheating on him with Water Prince. He hasn't ever talked to either of them ever since, and he quickly went into depression.
Fortunately, Marceline was there to cheer him up. They hung out and had fun, and Finn decided to forget about dating for a while. Marceline taught him everything about humans. They dug up material and he learned everything he needed to about his kind.
By the time he was 18, Finn felt as if he was actually there with the humans before the Great Mushroom War. He and Marceline also dug up some old clothes human teenagers like himself wore. So now he sported blue skinny jeans, black Reeboks, a light brown T-shirt, and he now wore his bear-hat as a hood, to which he could connect to all his shirts.
Finn even worked out, losing his baby fat and actually showed some muscles, also gaining six-pack abs. He was now a practical tourist attraction to the princesses. Finn began to hang out more with Marceline after Jake left and moved in with Lady once they married. Their kids were already old enough to go out on their own and went house-hunting, living by themselves. But when Finn was sixteen T.V (Tim Veeron) went missing was never found.
Finn sometimes hung out with Fionna when she wasn't hanging out with Marshall Lee. Cake and Lord Monochromicorn also married, had children that went on their own soon once old enough, with one of them also being reported missing. Finn, Peppermint Butler, Cinnamon Bun, Lumpy Space Prince, Prince Gumball, Marshall, Cake and L.M's sons, and Kim Kil Whan at times had Guy Nights when they just wanted to get away from their girlfriends for a while, or just wanted to hang out and have loads of fun.
Marceline and Finn worked together to restore the lost memories in Ice King, and were successful. Though Simon kept his wizard appearance, he remembered Marceline and who he was. He officially stopped kidnapping princesses. A few months later, Simon alas cured his physical appearance and became human again, thought he stayed in the Ice Kingdom since he was accustomed to the area. Especially Gunter. Finn was also glad that some princesses stopped bothering him and got hots for Simon. But now Simon has done almost nothing but try to find his Betty again.
A couple months after Finn turned 17, Finn discovered a very rare, and dangerous demon was contained inside him from watching a video his birth parents made while learning about humans. So Finn had to learn to control his anger or the demon within him would influence his body, move on to the mind, and then corrupt his soul, and then there would be no more Finn Mertens…only the demon. It took awhile for Finn to accept this, but realized it was no one's fault, and that he was still a hero.
Finn, his clothes a bit torn up and scorched, part of it actually still a little on fire, knocked one the vampire's door. The door swung open and Marceline tackled Finn to the ground, her demonic face screeching at him. Finn only stared at her with a bored-like state. "…is that it?" he asked nonchalantly.
Marceline's face returned to its normal state, and she got off him, pouting. "Ugh…this sucks!" she whined. "I can't scare you easily! You're no fun anymore!"
"Whatevs," Finn stated, standing up and brushing himself off.
"What happened to you?" questioned Marceline.
"Hmm? Oh. I just saved Little Dude and a Jelly Kid (Bravest Warriors! :D) from a gang of dragons and a school of giant fire-breathing, carnivorous plants. I obviously had to team up with the Ancient Sleeping Magi of Life Giving."
"M'kay. You are such a weenie though."
"Hey! I am not!"
"Whatever you say, goody-two shoes."
"I'm not a goody-two shoes, either! I'm hardcore!"
"Sure you are. Whatever you say Finnegan, you'll never be able to compare more than this daughter of the Lord of Evil and queen of vamps. Just because you have a rare demon inside you doesn't make you better."
"I never said it did! But I'll prove to you that I'm not a weenie nor a goody-two shoes! I'll…I'll…I'll be a bad boy! Yeah, that's it! I'll show you I can be a bad boy!"
Finn ran from his best friend and through the Grasslands.
"I'LL SHOW YOU!" he yelled, still running. "I'LL SHOW YOU ALL!"
And he was soon out of sight.
An 18-year old Fionna deflected a fireball with her Crystal Sword she learned how to control. "Give it up, Xergia!" she shouted.
Xergia laughed, "Never! The Goblin Kingdom will be ruled over me again!"
Fionna growled and leapt at Xergia, high-kicking her in the face.
Xergia grunted in annoyance and stabbed her wand in the ground. The flowers then began to come to life and walk like zombies towards Fionna. "Good luck fending off my evil army of living flowers!" Xergia cackled before using her wand to teleport away.
"No!" cried Fionna before being punched in the gut by one of the flowers. Before she could counter, one grabbed her ankle and threw her to a tree. As Fionna rubbed her head, groaning in pain, a fly dropped on her head.
"Huh?" she took the flyer off and scanned it. After ten seconds she gasped. She stuffed the flyer in her pocket and ran out the forest. The army of evil flowers started to follow her, only to be ambushed by a pack of starving, mutated rabbits.
Fionna raced across the grass fields, sweat rolling down her cheeks. She had to get to Marshall's. Fast.
No way was anyone taking her Marshall and calling him their property. Definitely and absolutely not her Marshall Lee. Otherwise, they would have to talk to her fist about it.
"Hurry it up, Haley!" Flame Price called from the entrance of his room in the Fire Kingdom.
"Wait, Jarred!" Flame Princess screamed from her room.
"You've said that like, five times already! We can't keep our dates waiting!"
"DONE! I'm coming!" Flame Princess exclaimed and running over to her cousin. "How do I look?" she asked, twirling around in a red dress.
"Great. Now let's go-"
"Only great?"
"Come, on!" Flame Prince grabbed Flame Princess's arm and dragged her out of the kingdom to greet their dates, just finishing their preparation of their double date with Water Princess and Water Prince.
There's more to come! I might pretty much be focusing on this story more than the others! Review please!
-BossKing109