Oneshot: Action, Romance(?), Loss of Control, Star X Marco, Destroy the School Weird

"Oh!" Said Star, "Here it is. Looks like it's in an ancient language. Hmm... bone repair... strength... side effect... caution... control... possible infection... Aha! Relesio Demonius Infestica!"

Marco's arm bursts from the cast, turning purple and growing into a large tentacle. Marco screamed.

"I can fix it!" Star shouted. About an hour later, this proves to be far more difficult to do than she thought, surrounded by ancient translation books. At least she knew what she did wrong.

The spell takes the subjects will to fight and uses it to heal their body. However, it was designed for mewman soldiers who had fallen in battle, meaning that their energy would be spread over the entire body. What appeared to have happened is that Marco's will to fight had been all channeled into his arm.

Marco's mortal body, not being designed to take that much magic, had grown and taken on a small mind of its own, wanting nothing but to fight. All she had to do was disperse that energy throughout Marco's body. Without destroying his arm or the rest of him in the process.

Star, having come to this conclusion, looked up at the brightening sky. She had been working hard all night and she still had to go to school. She could find the correct spell later, for now she would go and get some breakfast.

Later, after school, Star was wondering if Marco would even want to get rid of the monster arm, but of course he would. Sure it was stronger, faster, and more useful than a regular arm, but it was slimy, purple, and kinda gross.

Star worked through the night. Potted plant after potted plant. Tiny changes to the invocation. She was too tired to think through the problem, so she was just going to brute force it.

Morning arrived. Star was nearly falling out of her chair. She'd gone through hundreds of spells, hundreds of plants. Only about two dozen left. "Returnio... Armius... Normalrino... " The potted plant turned into a simple, human arm. Star smiled tiredly. The arm gave her a thumbs up. She fell asleep at her desk, face down on the papers she had been reading.

"Star..." Marco gently shook his friend, "Hey, Star, we still have to go to school today, remember?"

"Wha?" Star looked up, a piece of paper stuck to her face.

"Star, it might be a half day but my permanent record is on the line, and I'm not letting you skip either."

"Marco!" Star jumped up. Tired but no longer falling down tired, "I can fix your arm!"

"Oh?" Marco didn't seem concerned.

"Yeah, I can do it right now, see!" Star pointed to the potted arm.

"Uh, Star, I don't really want to lose the monster arm."

Star was dumbfounded, "What? Of course you do, it's a monster arm."

Marco gave her an annoyed look, "I like it, it helped me kick that jerk Jeremy's butt today. Though we were both disqualified. Did you know the little punk had brass knuckles under his gloves, what a cheat."

Star gave him a just as annoyed look, "And having a monster arm it totally fair."

"It's fair for me! I don't get special lessons." Marco was angry just thinking about the little punk.

Star sighed, "That arm is a bad influence on you."

Marco stepped toward Star, pointing, "Ohhhh, funny how you never have a problem using your magic when it benefits you, but as soon as it gives me an advantage, you want to take it away!"

"Marco, you're scaring me." Star took a step back, gripping her wand tighter.

Marco took a deep breath, letting it out slowly. "I'm sorry Star, it's just... Let's go." Marco turned and left the room. A whisper entered his mind. You don't need her. I can give you everything that you want.

Marco replied, I want my best friend to like me, and not be scared of me.

The monster arm was silent all the way to school.

School was pretty good. It was a half day, only two classes. People were congratulating him on his 'victory'. He showed off his monster arm a bit more, impressing Jackie Lynn Thomas, and his first class was AP Math. Easy stuff.

Between classes he found Star mooning over Oskar in the parking. He sighed, she did this every so often, and it was annoying. But he didn't push her. He wasn't one to talk, having put off asking Jackie out for years. The bell rang behind him.

"Star! Time to go." When Star turned to him he noticed a small bit of purple on her face. "You got some paint or something." Marco pointed to Star's forehead, where what looked like a small purple heart sat. "Right here."

Star reached up and peeled the heart off. She looked at it, horrified. "Marco, this is not paint." Star says, a scared look in her eye.

"Well, looks like you got another heart." Marco peeled the small purple heart off with his tentacle. It's the same colour purple as the skin of the tentacle even. Perhaps dark purple was a mewman colour or something.

"Quiet, Marco. This is serious! I think I'm going through... Mewberty." Star said, as if she were pronouncing the towns doom.

"We~ll, oka~y. Uh, mewberty." Marco chuckled "That's nothing to be afraid of. We have a similar thing here on Earth."

"Don't confuse this with your Earth things, Marco! I'm from Mewni!" Star whispered, "This is gonna get really weird. You gotta keep me away from boys! Wait a second... Marco's a bo~y..." Star gripped Marco's hoodie, pulling him close as half a dozen purple hears appeared on her face.

Marco tried to push her away, to say something, but his monster arm wasn't obeying him. It curled around Star, pulling her closer to him. Star's eyes were half lidded, attempting sultry, but with a face full of purple hearts it wasn't very attractive.

"S... Star?" Marco asked tentatively.

"Yes Marco?" Star half whispered as she traced small circles on his chest.

"This isn't just normal weird is it?"

"Oh no, this is like, destroy the school weird." Star came back to her senses, pushing Marco away, "Ah! You're boy body is part of the problem!" Star jerkily ran and jumped into the girls bathroom.

Marco approached the door carefully, "Is there any way that I can help?" He shouted through the door, "Maybe that magic instruction book?"

"I don't know, maybe?"

"Ok, I'll go home and get it."

"It's not at home!" Star was feeling a bit embarrassed.

"What?"

"I lost a bet ok, Ferguson has it!"

"Dammit Star! We need to have a talk about this betting thing." Marco ran off to find Ferguson. Star sighed and turned around to look at the washroom as someone flushed a toilet. Janna stepped out of the stall, adjusting her skirt.

"Oh, hey Star." Janna said as she washed her hands, "What's up?"

"Mewberty." Star said dejectedly.

"Is that like puberty?" Janna dragged a large burlap sack out from under the sinks.

"Does puberty make you go crazy over boys, grow wings, turn purple, and imprison the entire eligible male population for a mile in every direction looking for your 'soul mate'?"

"I wish!" Janna exclaimed, "On earth it just makes you bitchy, gives you your period, sometimes gives you boobs, and is generally a hassle. At least it is if you don't turn out hot."

Star finished peeling the last purple heart off her face. "Sounds pretty bad. But you have to be careful with mewberty, If someone can stop you from doing your thing for long enough you might bond with them, which kinda sucks because you turn permanently into your mewberty form, which is kinda a mixed bag. Fortunately on Mewni people know to just go along with it because in the end it's pretty harmless. I'm just worried about someone here thinking they can stop it. Hopefully Marco can find something in my book of spells."

Janna looked surprised, "Your book of spells, huh?" She said sheepishly, sliding the burlap sac behind her.

Star stared at herself in the mirror, picking off the occasional heart that showed up. They were coming faster now. That was odd, there weren't any boys around. Star looked at Janna. If Janna were a boy and hadn't told her she'd be a bit peeved. It was at that moment that Star learned something new about herself.

"Hey Janna, you're pretty cute."

Out in the hallways of Echo Creek Academy Marco was still searching frantically for Janna, when he came across the bathroom that he had left Star in. A mound of purple hearts had spilled out the door. Strange purple veins pulsed in the walls. A small crowd had gathered. Some of the girls peeking in. A few had puked.

Marco could just see past the crowd to a strange purple cocoon inside the bathroom. Inside the cocoon was a glowing white light. Attached to the outside was Janna. Well, he had found her, just in time to watch the cocoon explode, throwing everyone on their butts.

There stood Star. Slightly taller, deep violet skin, two, or was it six, wings extending from her back, framing her like a flower. Her arms had split into three thin, spindly sub arms on either side of her body. Antennae extended from her brow. But her eyes. They projected white light in the shape of a heart. Star grabbed two boys from the ground and slammed them into the lockers across the hall, destroying the doors and most likely giving them concussions.

A thick paste exploded from her six small hands, trapping the dazed boys in their makeshift cells. Marco slowly stood as his schoolmates ran for their lives. "Star?" He asked quietly. His monster arm shifted at his side, perhaps sensing something that he did not.

Star turned slowly and gave Marco a beatific smile, "Hey Marco." She said in a high, warbling, raspy voice, "You're really cute." Star giggled in staccato. Star darted at Marco, perhaps thinking to throw him into a locker of his own. His monster arm had other ideas.

The monster arm darted out, slapping Star across the face and turning her dart into a comet, shooting her through the wall next to him. Marco stood dumb for a moment, appalled at what he had done. Had he hurt her?

Nope, the monster arm lashed out again and Star somersaulted over him before darting back and fourth, dodging his many attacks. Maybe his monster arm had a point though. If he could grab her and hold her still long enough for her to get over this mewberty thing maybe she'd go back to normal.

When she dodged and slammed hard into a panicking student that had accidentally ran toward her instead of away it sealed his plan. Grab Star, pin her down, Get Janna and the book, fix this.

With his mind made up Marco sprinted into action, jumping onto Star. Missing badly, and landing face first on the floor. Star, for her part, webbed his back and tried to pull him up by his hoodie. Marco undid the zipper and let it slide off his arms as he jumped to his feet.

Moving quickly he began to dance with the near mindless Star. Attack, counterattack, dodge, and roll. Nearly mindless because occasionally she'd say something like, "Just let me take you!" Or, "Ma~rco~"

His arm proved more flexible in the end, and he wrapped it around her panting body, slamming her to the ground far harder than he had intended. She hit her head pretty hard but didn't appear to notice.

Star struggled, but he had been able to pin three of her arms and, jumping atop her struggling form he grabbed two more of the thin, insectoid arms and pinned them down. The final arm, to his relief, was more interested in stroking and caressing his face than punching it. Star giggled cutely. "Oh Marco, you're so~ strong." She grinned at him manically. He could see behind the projected hearts over her eyes into the flesh and blood ones beneath.

Creepily it appeared as if she now had three pupils. One diamond shaped one and two circles forming a crude heart. Her eyes darted, looking at him with one pupil at a time. She tried to use the arm that was caressing his face to pull him in for a kiss, but individually her split arms were quite weak, and he resisted its insistent tugging easily.

"Star, you've got to snap out of this, I know you're in there, and I know that you can fight this."

Star grinned at him, and made little kissy noises before saying, "But I don't want to fight it Marco, it feels so~ good." Star undulated her body in such a way that Marco felt uncomfortable sitting atop her.

While they talked Marco failed to notice small purple hearts appearing on his monster arm. Mewbery isn't usually contagious. But when you have an arm that is surprisingly compatible with your mewman's genetics and also happens to be storing quite a lot of magical energy. Well, accidents happen.

Marco was pretty tired from the fight. It's surprisingly difficult to fight a monster princess with magical powers and not hurt her or get hurt yourself. Takes a lot of mental fortitude, so you can excuse the boy for not catching on when Star's grin grew wider, having spotted a purple heart on Marco's forehead.

Marco's thoughts started growing a bit hazy. He was really, really tired. Star wasn't going anywhere, she wasn't even struggling. And besides, she was pretty cute in this form, after you got through the horror of it.

"Star," Marco said, "Just hold still, ok, I'm going to just-" Marco yawned, "I'm going to find..." Marco trailed off. His vision began to grow brighter, whiting out. He closed his eyes to keep out the light, and fell asleep on Star's chest.

Star, for her part, was giggling. She had watched as the hearts had sunk deeply into Marco's skin, turning him a nice, dark, nearly black shade of purple. She had sighed with pleasure as his pupils had expanded until his eyes had turned black as night.

She had nearly moaned in pleasure as she felt the monster arm pulse, sending its excess magic back into Marco's body as he used it to fuel the complex bio-organic changes going on in his body. He grew a little taller, a little skinnier. His fingers grew longer and his teeth sharpened.

As his arm uncoiled from her body she touched him all over with her six small hands, making sure he was ok. Star ginned so hard her face hurt. They were mewberty buddies! She was so happy that she had to find her wand and get them home.

Star darted up, but then toppled over. That fight had really taken it out of her, and she was slowly coming to her senses, now that she had fulfilled her purpose. Since she was no longer acting on instinct she had forgotten how to fly properly, and instead ran toward the bathroom where she had last seen her wand.

Kicking piles of purple hearts out of her way she eventually found her wand, her magical instruction book, and Janna plastered to the wall with purple webbing. Janna's face was covered in purple lip prints from Star's new venom glands. She hadn't been strong enough to resist the anesthetic. Too bad, she was cute.

Star gave her another quick kiss on the cheek as she ripped the wand and book from the wall and skipped back to Marco. Her wings buzzed at the top of each arc, turning her skipping into a sort of floating prance.

Marco was groaning on the floor. Not in pain, but in a sort of confused, longing way. Star picked him up like he weighed no more than her enormous book, and tried to think of the spell that would get her home. Nothing came to mind. She knew that she knew one, but didn't remember which it was. Oh well, the Diaz house wasn't very far. She pranced out of the school, leaving behind thousands of dollars in property damage and psychologist fees.

Later Star's buzz was being considerably harshed by her mother, who insisted that she and Marco be quarantined until they, meaning her mother, were certain Star and Marco were back in their right mind. Star thought that she was in the best of mind. She was sitting on her childhood bed, a large magical dome around her. Marco was lying on his side, tuckered out by the ordeal. She had laid his head in her lap and was absentmindedly stroking his hair with two of her hands.

Sure, the smile that she felt glued to her face was probably a bit wider and wilder than it needed to be but she was so happy. She had found her bond mate. It was a very rare thing, though her mother certainly couldn't appreciate just how happy it made her to find someone who was Star's equal. Her mother couldn't stand the idea of someone who might match herself in power. It was always, 'I'm the queen this', and, 'those fools would lose their own heads without me' that.

Marco nuzzled gently into her palm and cracked one of his pitch black eyes to look up at her. Star turned her beaming smile down on him and he smiled back up at her before closing the eye and going back to sleep. Star tuned her mother back in.

"This is so embarrassing! It's been nearly twenty generations since the last bonding! What will the nobles say when they hear that you couldn't keep it in your pants for two hours?"

"Hey!" Star interjected with her new, strange voice, "We didn't do anything!"

Her mother stopped pacing and looked at her father. He, being the silver lining sort, was finding this all very amusing. Her mother turned away, disgusted by his characteristic lack of worry. "That's not how they'll see it. They'll be up in arms, protesting in the streets, saying how, if I can't control my own daughter, how am I supposed to be able to control the country."

The queen sighed. Star wanted to sigh too, but she was far to happy, sitting here with her Marco. He was hers. She was nearly giddy with glee. "They can't say anything. Isn't it part of law that you're allowed to love anyone that you want?"

"Love?" The queen scoffed, "Mewbery bonds aren't about love Star, you should know that, they're about who the dumb, insect part of your brain thinks would be the best candidate for having children with. Love has very little to do with it."

Star shook her head, she loved Marco, she did. "Shut up!" Star had never had the courage to say that before.

The queen sighed, "It's clear that you aren't going to be reasonable about this. River, we have things to do. Geoffry, keep an eye on these two, don't let anything indecent happen." Star's father nodded and followed the queen out. The aging butler who Star still thought of as uncle Geoffry stood by the door, watching them like a hawk.

Star sighed and hugged Marco to her chest like a doll. She did love him. She did.

A/N: This is a request by The Cowardly Christian 'du911. I hope that I did the idea justice. Let me know! And if you have an idea that you think would make for a good one shot, please tell me, and I'll write it for you!