Adventure Time Rebellion: Fight for the Throne

Chapter 3: Finn Mertens

Finn opened his eyes with difficulty, surprised by the overwhelming darkness surrounding him. It was pitch black, yet he felt incredibly light, almost like the wind itself. For a brief moment, he enjoyed the sensation before a brilliant white light appeared, growing larger and larger. No, it wasn't the light expanding—it was him, rushing toward it at an incredible speed.

The light soon transformed into a round, white portal. A few meters away from it, he abruptly stopped and began to drift backward. Turning to look behind him, he was shocked to see a massive white triangle with a black circle forming at its center. Unable to resist, he was pulled into it and lost all sensation.

He felt something wet brushing against his face as his consciousness returned slowly. Annoyed, he swiped his hand over his face to brush it away, then sat up from the ground, only to be overwhelmed by intense dizziness.

Holding his head, he waited for his blurred vision to clear. Once it did, he realized he was wearing strange blue clothing and noticed a small squirrel beside him, staring with innocent eyes. Ignoring it, he tried to stand, only to collapse again.

"This dizziness is killing me," he muttered, clutching his head, oblivious to his now-different voice.

After a moment, he regained enough strength to stand shakily. Finally taking stock of his surroundings, he found himself in a dense forest. The thick canopy above barely allowed any sunlight through, and shadows from the leaves surrounded him from every direction.

"Hello, Finn," came a sudden voice from behind. He turned to see a medium-sized black bear and immediately panicked. Screaming, he ran away.

"Well, if you'd told me you thought my appearance was terrible, that would've been nicer," the bear grumbled, examining its face with a claw while looking down.

Finn hid behind a tree, cautiously peering out to ensure the strange talking bear wasn't following him. Suddenly, the word the bear had said echoed in his mind: "Finn."

"Finn?!?!!"

The boy was shocked. He looked around before spotting a pond nearby and hurried over to see his reflection. His heart raced as he took in the sight of his shoulder-length blond hair, his complete blue outfit, and—his face.

"Finn Mertens!!" he shouted in disbelief.

Accepting this was difficult. He initially thought it was some kind of hallucination or perhaps a near-death experience, but everything felt too real for that. Reluctantly, he set aside the idea.

Since he had no other choice, Finn decided to accept his situation. Denying it wouldn't change the fact that he was now Finn Mertens. Hours of walking through the oppressive forest had given him time to process the bizarre reality he was living in. At first, the thought of being trapped in this body and world felt suffocating, like a heavy weight pressing down on his chest. But as the minutes stretched into hours, his resistance waned. His mind began to adapt, reshaping itself to fit this new reality. Whether he liked it or not, this was his life now, and the only way forward was to embrace it.

A sudden thought struck him: "Wait, I always wanted to test this kid's strength!" He faced a tree, then leapt toward it and delivered a punch that tore a huge chunk from its trunk. The tree groaned loudly before falling.

"Whoa," he murmured, impressed, and continued his journey while punching and kicking the air. Eventually, he emerged from the forest into a sprawling green field. In the distance, he saw a large green treehouse, with strange icy hills beyond it.

"The Treehouse!" he exclaimed joyfully, sprinting toward it. Along the way, he caught a glimpse of the massive pink city in the distance. "The Candy Kingdom," he whispered in disbelief. But the Treehouse was his priority now.

Reaching the brown wooden door, he knocked on it enthusiastically, refusing to stop until it opened. He heard a grumbling voice before the door swung open to reveal a short, yellow dog.

"Finn?!" the dog exclaimed, shocked, before leaping toward him in a tight hug. "Oh my glob, dude, you scared me! You usually don't take this long on your explorations."

"Explorations?" the blond boy asked.

"Yeah, you've been out exploring for a week, and you were gone so long this time! Where were you, man?" Jake scolded him as he let go.

Finn sighed. "Well, Jake, I need to tell you something important—"

"Ah, later, bro. Follow me; we've got guests," Jake interrupted, heading upstairs. Finn hesitated but followed him.

Determined to explain the truth, Finn ascended the stairs. He disliked unnecessary complications and wanted to leave this bizarre situation as quickly as possible. While climbing, he saw something that made him freeze in his tracks. Marceline was lounging on the couch, with Princess Bubblegum perched on her lap. Both were busy with their mouths, their movements below stirring clear friction.

"You two never miss an opportunity, huh?" Jake rolled his eyes as he walked toward the dining table, evidently accustomed to the scene.

The girls laughed and apologized as they separated, noticing Finn for the first time. "Oh, finally, you monster!" Marceline said, flying over to hug him. "I thought they'd already eaten your guts!"

Finn, still nauseated, muttered, "You all need a serious wake-up call." The sight reminded him of the decadence in his old world—the chaotic mess applied in every imaginable way, a stupidity he could fight here, unlike back home.

"Did you say something?" Marceline asked.

"No, I just decided that... I'll stay with you all a bit longer," he replied, narrowing his eyes with a cryptic tone only he understood.

"Well…" Marceline looked slightly flustered. "I guess that's... good."

After a while, Finn changed into a new, similar outfit. The four gathered at the table, with Jake proudly boasting about his delicious cooking. Finn, however, silently observed the two girls laughing together. It wasn't jealousy or desire—though he did want them—but rather a matter of principle, a principle he couldn't enforce in his old world due to the corrupt system and law.

But here, there were no laws. He could do as he pleased without consequence, as long as he played his cards right. As the hero of Ooo, Finn Mertens, he'd be a fool not to take advantage of this incredible opportunity. His main obstacle now was strength; he knew intelligence alone wouldn't always suffice. He needed to become stronger by any means necessary.

"So, Finn, you haven't told us about your adventure as usual," Princess Bubblegum said, trying to pull him out of his unnerving silence. He didn't react much, simply glancing at her briefly before continuing his meal.

The scientist sensed an unusual intensity in his gaze, one that unsettled her, though she tried to dismiss it. Meanwhile, Finn's thoughts were focused on the two girls. He needed to have them, both as a start to implementing his ideas and as part of a greater plan.

But his ambitions were growing, reflected in the subtle smirk forming on his lips. He realized now... he needed to conquer all of Ooo! With the world's lax system, his reputation, and his abilities, he was closer to that distant goal than anyone else.

Of course, he didn't deny his greed—it was for significant things, not trivial matters like a dollar more in his paycheck. No, he wanted a vast land filled with countless kingdoms. He had always known his thoughts were twisted and his desires immense, something he never denied even to Lila. And now, this was all he wanted to achieve.

Glancing at the pink princess, he thought, *She'll be the hardest, for sure. Her pride, intelligence, and narcissism make her an impenetrable fortress. But the more stubborn the prey, the sweeter the victory. And she holds great power in Ooo—claiming her would be like claiming half of Ooo itself.*

His gaze shifted to the pale girl beside her, *She's much weaker. In her thousand years of life, no man has touched her. Not an assumption—Finn could almost sense the purity of a virgin.*

Surely both girls were still virgins. It was natural for women to reserve their purity for someone they deemed worthy. That was an unshakable truth, even if denied outwardly. Marceline's suppressed desires might have buried those feelings, but Finn knew how to awaken them.

Finn noticed the teacup on the edge of the table in front of Marceline. Pretending he needed to use the bathroom, he subtly knocked the table with his knee—just enough to spill the tea onto Marceline's clothes.

"Damn it, my shirt!" Marceline exclaimed, seeing the mess. Jake suggested she follow Finn to the bathroom to clean up, and the boy succeeded in making it seem like she had chosen to follow him, not the other way around.

In the bathroom, Finn washed his face while Marceline entered, looking for a way to clean her shirt. He handed her a bucket of water, suggesting she soak it in there while he fetched her another shirt.

She removed her shirt, leaving only her black bra covering her upper body.

"Hey, respect my feelings, will ya?" Finn joked, his eyes lingering on her prominent chest. She was perfect as his first prey.

Her black bra compressed her massive breasts, while her pale, bare waist exuded an incredible allure. Even her lower half, clad in tight black pants, seemed deliberately dressed to highlight her large, round ass.

Marceline was undoubtedly stunning, her beauty extraordinary. Starting with her was a sweet appetizer before indulging in more extravagant feasts. Throughout his time watching the series, Marceline had always captivated him—not just for her beauty, but also for her naturally seductive personality.

Her personality was as provocative as her body, and it was a waste to see such beauty squandered in a grotesque relationship. Finn knew this and prepared himself to shatter her illusions and reward himself with her gorgeous, feminine body.