Disclaimer: Spider-Man is own by Marvel, while Star vs. the Forces of Evil is own by Disney.

Chapter 1: Star comes to Queens

If Peter Parker was late to school one more time, he had a feeling his aunt was actually going to lose her marbles. To be fair, it wasn't actually his fault; but tell New York City's criminal population that one of their most despised foes had to be to school by 7:45 or risk getting detention. That and the fact that his aunt didn't know he was the guy zipping around in a red and blue spider costume…well, let's just say that him being late to school wasn't really the worst thing that could happen.

He ducked under the spray of bullets from the one guy's gun (how original) and flipped off of the car in front of him, wincing as the sound of shattered glass hit his ear drums. Hope the owner of that car had insurance.

The three he was up against had, for some reason, decided an early morning heist was the best time for doing anything criminal. Granted, most people were half dead in New York until they had access to a solid black cup of coffee, but that didn't mean it was a good idea to be out robbing convenience stores in broad daylight.

The webbing curled out from his wrist and swiped up their guns in a heartbeat, before they could even think to fire again, and Peter deposited them on the ground without any kind of ceremony. "You done yet?" he deadpanned, glancing pointedly at the cops behind him.

Two of them had the sense to put their hands up, but the third sneered and drew out a knife-a knife- from his pocket. Peter yawned, both from exhaustion and boredom, and had the weapon in his grasp in a matter of seconds. He spun the blade lazily, watching with appreciation as the sharp tip glinted in the sunlight "How about now?" he asked.

Hands up, Peter turned, accepted a donut from one of the cops, and flew off to school, dusting the city with powdered sugar. He heard the school bell as he got closer and groaned, dropping to the ground behind a building to change and then sprint to the school.

He was hoping to be able to slide in through the doors unnoticed, but wouldn't you know it, there's a dusty old math teacher acting as hall monitor standing practically in front of the entrance. Despite every plea that he made that being sent to the office instead of class was, in fact, worse for his education, he still found himself being shoved through the doors, a late slip in hand.

The secretary glanced up at him and his slip, unamused, and nodded back to the principal's office with a roll of her eyes. Peter did so compliantly, knowing that she didn't get paid enough to deal with his whining, and rounded the corner, only to find Jackie Lynn Thomas and Janna Ordonia playing what looked like Uno outside of Principal Skeeves' office. He frowned, tilting his head. "What are you guys doing here?"

They glanced up just as Janna put down a red four, giving warm smiles to Peter. "Waiting to talk to Skeeves about my student travel program this summer," Jackie answered, retaliating with a skip and a five. "Late again?"

Peter smiled sheepishly. "Yeah."

Janna grinned, wiggling her eyebrows suggestively and slapping down a draw four. "Me too. We can be detention buddies."

Peter rolled his eyes, about to retaliate, when Skeeves popped his head from the office, a frown on his face. His gaze landed on Peter like he had sensed him there from the beginning and he gestured him in, holding up a finger to Janna and Jackie before ducking back in. Peter shrugged at them vaguely and followed the principal, stopping dead in his tracks.

Aunt May was sitting opposite of Skeeves.

"What uh…what…?"

Skeeves shut him up with the wave of a hand, sinking down behind his desk. "You're not in trouble."

Peter opened his mouth to protest otherwise, the detention slip still folded in his hands, but thought better of it. As he took a seat next to Aunt May, he finally noticed the fourth person in the room, curled up in the chair furthest from the desk and closest to the window. A suitcase rested next to her seat, and she was gazing out the glass at the parking lot like it was Mount Olympus. "So…what-?"

"You're taking in a new exchange student!" Skeeves said in delight, as if he hadn't just dropped a bomb on Peter's head.

Okay, maybe that was an exaggeration. But one more person in the household meant one more person who could potentially learn his secret, which meant one more person who could get hurt because of him. Peter side eyed the girl with a hesitant frown, lifting an eyebrow. "Oh?"

Aunt May clapped him on the shoulder, a grin on her face. "Peter, this is Star! She needed somewhere to stay, and since we have room, I thought it would be nice to have another person in the house!"

Star (what kind of name was Star?) turned away from the window and gave him a bubbly grin. Peter jolted a little at the tiny images of hearts on her cheeks; did she have tattoos, or were they just remarkably shaped birthmarks? "Nice to meet you Peter! Star Butterfly!"

She stuck an eager hand out, bouncing up from the chair, and Peter found himself taking it slowly. He was at least a good foot taller than her, so she kind of shrank under him. She couldn't be too much younger than him, though, if she was in the high-school's exchange program. "Uh…hi. Where're you from?"

"Mewni!"

Peter had no idea where that might even conceivably be, but before he could ask, Aunt May was turning to Skeeves and collecting paperwork and information that she needed for Star. As they walked out, Skeeves tossed out a casual, "See you in detention, Peter!" that had the teen cringing in defeat.

Aunt May shot him a frown. "Detention again?" she asked, giving a polite wave to Jackie and Janna as they shuffled past them. "How many times is that in the last two weeks, Peter?"

He winced. "Like…seven? I was just late!"

"You leave forty-five minutes before school every day, I don't know how you could be late!"

Peter swallowed and glanced at Star, who didn't seem to be paying much attention to their argument. Her gaze was focused with rapt attention on the pictures that were scattered through the halls. "Are you staying for classes?" he asked politely.

Star jolted and turned her gaze to him, smile reigniting. "Oh! No, I'm going home with your mom."

Peter flinched, noticing the way Aunt May grimaced as well. "Aunt," he supplied weakly.

Star frowned but didn't pry, for which he was grateful. "Aunt, then. I'm coming to school tomorrow. Maybe we'll be in some of the same classes!"

"How old are you?" he asked, mentally running through his schedule in his head.

"Fourteen."

Peter hummed thoughtfully. "A year younger than me, then. We might have some of the same extra curriculars, though."

The bell rang and students began swarming the halls, jostling past their tiny group with muttered apologies. Peter lifted his crumpled detention slip in the air, shooting a smile at his aunt. "Gotta go. Don't need another one of these."

He pressed a kiss to her cheek, waved goodbye to Star, and darted off before he could get a final lecture.

When he finally, finally got out of detention and managed to escape Janna's platonic flirting, he slipped into his costume and flung himself in the direction of home. Not even halfway there, he heard a bunch of screeching, shouts, and crashing metal, and he ducked in that direction, letting his web carry him seamlessly through the air in time to watch a subway car go careening down the rails. The screeching was the wheels of the cars at the intersections; Peter spotted more than one fender bender, but no one looked seriously hurt, so he went after the subway car, flinging himself in through the entrance and scaring the living daylights out of the conductor. "What's wrong?" he demanded.

The conductor flailed helplessly at the monitor. "I don't know!" he sobbed. "It's stuck somehow!"

"Of course it is," Peter muttered, flipping out the window without a second thought and crawling around and under the car to check and see if he could find the problem manually. Sure enough, one of the brakes was loose, and he was able to secure it with a bit of webbing.

"Try it now!" he hollered up to the conductor once he had gone topside again.

The brakes shrieked in protest as the man yanked on the controls, and though the cart was slowing, it was still moving at what was practically a sprint, so Peter flung his hands out, stringing webs between the electrical rails on either side of the subway cart. It drifted to a crawl and, the moment it finally stopped all together, Peter tipped an imaginary hat at the conductor and removed himself from the scene as quickly as possible.

As much as he enjoyed helping people out, he sometimes felt as if he were in a sitcom what with how many clichéd situations the city got itself into. Seriously, runaway subway cars? How comic book-esque. Still, there was something to be said for clichéd problems: they always had clichéd solutions.

He swung himself in through his bedroom window and changed out of his costume, dropping his bag out on his bed and rifling through his papers to make it look like he had been home a while. He wiped a smug of dirt off his face, grabbed a granola bar and took a chunk out of it, and left the room with his half finished math homework in hand. "Hey Aunt May! I have a question!"

Star and May looked up in surprise when Peter walked into the living room, where they were busy setting out tea. "Peter!" May declared. "When did you get home?"

"Couple minutes ago. You guys seemed busy on whatever you were doing so I just went to my room. How you settling in, Star?"

The girl shook off her confusion and gave him a bright smile. "Not bad! Your aunt gave me the guest room right between you and your sister. You didn't tell me you had a sister!" she squealed.

Peter gave a smile at the mention of Theresa. "Yeah. She's ten. She'll be home later, she's at…karate, right Aunt May?"

The woman hummed, thinking for a moment before nodding. "Yes, karate. Can't have people walking around the streets of New York City without protection," she laughed, setting down the teapot she had been holding.

Star pointed at the television, where Peter could see the news running. "You guys have this spider person though, don't you? That's awesome! He's like…a superhero! We had a guy like that back on Mewni, except he wasn't a spider person, he was a warnicorn. And he couldn't shoot webs, just rainbow lasers."

Peter blinked, trying to process everything Star had just said. "Uh…what?"

Star glanced up at him, waving a hand like she just hadn't explained something quite as thoroughly as she could have. "Oh, warnicorns. War unicorns!"

"I'm…yeah, okay, but…where are you from, again?"

Her smile brightened and she bounced to her feet, pulling what looked like a child's wand off of the arm chair next to them. "I'm from Mewni! I'm the princess of Mewni, actually!"

"You're…a princess."

"Yes!"

"Oooookay. And uh…where is Mewni, again?"

"It's in a different dimension."

Peter bit back a laugh in favor of looking at his aunt pleadingly. Had they just agreed to let a psycho stay at their house? He got enough of delusional people in his day to day life, he did not need someone sharing the same roof as him. Aunt May just gave a tiny smile and turned back to putting out afternoon snacks for when Theresa got home. "A different dimension," he repeated, looking at Star, his eyebrows furrowed.

She nodded, her smile still bright. "Yup! And my parents wanted to send me to Earth, to train to use my magic so that one day I could become the queen!"

Peter groaned internally. Magic, he believed in. Or at least, the idea of it. He'd seen too many crazy things in his short life not to. Hell, he had spider powers! To be fair, those were easily explained by science, but some of the people he met and knew…well…some things were better left unquestioned. But there was a fine line between science that acts like magic and straight up fairy tales and unicorns magic. He had a feeling Star wasn't talking about the first one.

"Magic," he managed to get out.

She bobbed her head, pigtails flopping uselessly, and held up the wand. "Magic!"

"Right. Well, if you don't mind, I'll be in my room doing homework."

Aunt May straightened, a frown on her face and a look in her eyes that was clearly telling Peter to sit his ass down at the table and enjoy tea with their new house guest. Peter smiled apologetically and bolted, shutting his door rapidly and leaning back against it with a sigh of relief. Sweet, sweet freedom.

He began pacing, scuffing at his carpet every few seconds with a frown on his face. Why did he have to always deal with the crazies? Supervillains, fangirls and fanboys, all kinds of people who just either didn't understand personal space or didn't quite get the concept of reality. To be fair, Star didn't seem that odd. If anything, she was just…a fangirl without the fan.

"Like that makes sense," Peter muttered, kicking at his bed frame halfheartedly.

The sound of the front door opening and closing reached his ears and he perked up at the sound of Theresa's voice.

Though he and his sister fought on a regular basis, as most siblings do, Peter loved his sister to death. She was the only other person in the world that knew he was Spiderman (though her finding that out had not been his intention at all) and she kept it a steadfast secret, so long as he brought her little trinkets from his calmer battles. He had gotten a couple of autographs for her (she was a big fan of the Hulk, for reasons Peter couldn't fathom), but she understood that his life would be much worse if people knew.

Having Star in the house might actually be good for her, Peter reasoned with himself. She'd have someone to keep her company if he was late getting home, and there was only a four year age gap between her and Star. Of course, Theresa wasn't really into the dress up and magic and stuff that she had been into when she was younger, so maybe Star-

The sound of something blowing up in the living room sent Peter scrambling for the door, sprinting down the hall in time to see Theresa giggle and pick up a puppy (where the heck had those come from?) off the floor. He lowered his hands, dropping his middle and ring fingers from where they had been hovering over his wrists, and shot a befuddled look at the litter of tiny dogs in the middle of the room. "What in the-?"

One of them yapped and bright red lasers promptly shot from it's eyes, slicing Peter's shirt sleeve and burning a tiny pinprick of a hole into the wall behind him. He yelped, slapping his hand over his smoking sleeve and shot a glare at Star. "What is going on?" he demanded.

Star smiled sheepishly. "Sorry, Peter. They're just puppies! I didn't uh…I didn't intend for the lasers to happen."

"She's a magic princess, Peter!" Theresa cried in delight, bouncing over to her brother and dumping the dog she had been holding into his arms. He fumbled with the creature for a moment, a little terrified about having something with laser eyes near his bare skin, but eventually settled once he realized the dog was just hanging out.

Peter glanced up in time to see Theresa touch Star's wand in fascination. "Theresa!" he snapped, scaring the puppy in his arms enough to cause it to zap his fingers and jump from his grasp to the floor. He hissed and shook his hand, looking at the girls in irritation. "Don't touch whatever that is," he scolded. "Look, I don't know what kind of experiments you were performing on these dogs, but we can't have pets here anyway, let alone ones that shoot laser beams from their eyes!"

Star frowned. "Experiments? No, Peter, they're-"

"Just…we could get kicked out if they're here. You know that, Theresa."

Theresa slumped and nodded, stepping away from Star and ducking her head. "He's right," she admitted, though she sounded reluctant about saying it. "We could."

Star slumped. "They weren't experiments. And I…don't really know how to make them go away."

"What?"

Star waved her wand thing around, jabbering some kind of sentence that Peter couldn't make head nor tail of. Sparks shot off from the wand, aimed at the puppies, and for a moment, the living room was centered in a white glow. When it died, all the dogs were still there, but now they were all wearing collars. Star threw her hands up. "See!"

Peter looked from the wand to the dogs to the collars and back to the wand. "You're really…"

"A magical princess," Theresa confirmed, a shit eating grin on her face at the thought of her sibling being proven wrong. "Yup. Told you so."

Peter blinked and took a step back, sinking into the chair behind him and glancing around. Not able to process much else, he asked the first wuestion that came to mind. "Where's Aunt May?"

"Ran out for milk and cheese for the pasta tonight," Theresa informed him. "She was waiting for me to get home first so that Star wouldn't be all alone, since someone locked himself in his room."

"I didn't lock myself in!" Peter protested.

Star collapsed on the couch across from them, swinging her legs against the pale lavender couch covers and staring at the floor with a frown. "Sorry I didn't explain it well when we first met," she said, glancing up and trying for an apologetic smile. "Hey! Do you think maybe that Spider guy would want a partner?"

Unfortunately for Theresa, the girl had just started taking a sip of lukewarm tea when Star asked. It came spewing from her mouth and nose in choked laughter, and Peter scowled in her general direction as she cleaned the mess up, still cackling. Star just looked confused, her eyebrows furrowed and her smile a little more forced. "Did I…say something funny?"

Theresa snorted, choking for another moment before managing to speak. "The spider guy isn't really a 'team player,'" she got out, putting finger quotes up in the air.

Peter frowned. "I wouldn't say that. He's just…picky, is all. Nothing wrong with being picky."

"There is when you're a big jackwad about it."

Star's eyebrows had lifted into her hairline. "Sooo…you think he'd say no, then."

"Oh probably," Theresa said, eyes rolling and foot stepping a little too hard on Peter's to be an accident. "He's a real snot."

"He is not!" Peter yelped, looking at Star a little aggressively. He softened at her startled gaze. "I just…he might be concerned about your intentions, is all. You…are from another universe. He'd probably be suspicious of you."

"Like you are."

Peter flushed. "Well…um…that is to say-"

Star snorted. "I'm kidding! Well…if I proved to him that I just want to help and have fun, you think then he might want me as a partner? Fighting monsters in your world would be so cool!"

Theresa started choking again, her cheeks rosy, and Peter nudged her with a scowl. "It all depends, really," he admitted.

Before Star could ask any more questions and before Theresa could continue choking and drowning in her tea, Aunt May walked in, grocery bag in hand, only to be surrounded at the heels by the puppies. "Oh!" she cried, struggling not to step on them.

Peter leapt from his seat and stretched, taking the paper bag from her and taking it to the kitchen table while May knelt, patting the dogs in delight. "Well aren't they precious!" she cooed. "Star, I'm sorry, but we can't keep them. Ordinance says-"

"You know," Theresa mused as Peter returned from the kitchen. "Ordinance doesn't have to know about the dogs. They aren't even real Earth dogs, really."

One of the puppies zapped it's laser eyes as if to prove it, and Aunt May shot a surprised look at Star. The girl smiled sheepishly. "Sorry, Mrs. Parker. I can't get them to go away."

May pursed her lips and scratched one of the dogs on the head absentmindedly. "You know Theresa," she hummed. "You're absolutely right."

After twenty minutes of arguing and trying to get the puppies to stop with their laser vision, May ordered Peter to take Star around the city while walking the dogs. Though Theresa protested, she still had homework to do, so Star and Peter snuck the dogs out the back of the building and set off on their tour, Star walking the dogs and Peter gesturing vaguely around the neighborhood.

"This is Lou," he said, nodding to the hot dog vendor at the street corner that he usually stopped at when he walked home normally. "Makes great dogs."

"Oh, me too!" Star said in delight, glancing down at the puppies.

Peter bit back an annoyed groan and an eye roll and smiled at Lou as they walked past, waving. "Not the same thing," he hissed from the corner of his mouth. "Normal people on Earth don't have super powers."

"What about that spider guy?"

"Spiderman," Peter corrected, exasperated. "And he…well, it's more science than it is magic like yours."

"Science?"

Peter stopped dead in his tracks and stared at Star in disbelief. "You don't have science on Mewni?"

She shrugged, stopping to let the dogs sniff at a sign post. "Maybe we call it something different. Can you explain it?"

Peter frowned. How did one explain science to someone who had never heard of it before? Human children learned it as they grew up, so they all kind of understood it from the get go. "Well…there's different kinds of science," he started out slowly, gesturing Star forwards as the crosswalk sign blinked for them to go. She stayed close by while he pondered, not wanting to get lost.

"Like there's different kinds of magic?" she questioned, skipping around a piece of sidewalk gum.

Peter didn't know about that, but he decided to go with it. "Kind of?" he tried. "So like…when you're talking about bones and stuff, like in people, that's anatomy. But when you talk about what chemical components people and animals and stuff are made up of, that's biology. Or like…things we know about space, the stars, the galaxy…that's astronomy. Stuff like that."

Star hesitated. "Well yeah, but that doesn't tell me what science is, silly! Just sounds like you're describing everything. And what does the sky have to do with the spider guy?"

"Man. Spiderman. And it's…ugh, it's complicated," Peter groaned. He rubbed his forehead, struggling to find a better way to answer her question, when suddenly they heard a shriek. Before he could even move, Star had thrust the dog's leashes into his hands and was running towards the yell, her wand at the ready. Without hesitating, Peter took off after her, the dogs yapping in excitement at his feet.

He rounded the corner to find Star soothing a little girl stuck in a tree (cliché, of course; at least it wasn't a cat, Peter reasoned), clinging to one of the branches with her face streaked in tears. She was too high up to climb to, and Peter couldn't do anything in broad daylight without his suit, so he pulled out his phone to call the fire station.

Star, however, aimed her wand at the ground and gave a wicked grin. "Bouncy castle mega blast!"

In front of his disbelieving eyes, a massive bouncy castle, complete with princess in a tower, materialized on the ground in front of him, and Star waved at it happily. "Go ahead!" she called up to the girl. "It'll be fun, I promise!"

Peter watched, mouth on the pavement, as the little girl studied Star, the bounce castle, and then let go of her perch with a squeak. Her hands lifted to cover her eyes and then she was bouncing safely onto the padded air of the castle, her giggles of delight overwhelming every cry of terror that had just previously exited her mouth.

Star helped her out of the castle with a smile and lifted her wand, making the object disappear with a faint "pop!" and a gust of air. The girl thanked her and darted off into her house, which was directly across the street. It made Peter wonder for a brief moment where the girl's parents were, but then Star was taking the puppies from him as if nothing had ever happened. "That was…wow," he admitted, slipping his phone back into his pocket.

Star offered him a sheepish look and shrugged, looping the leashes around her wrist and starting off again at a brisk pace. "It wasn't anything I wouldn't have done for a kid back home. Though most of them have like…magic." She sighed a little wistfully, scuffing the pavement with a toe. "Wish Spiderman coulda seen it. It'd be cool to get to work with him."

Peter opened his mouth, ready to correct her, when he realized that she had gotten his name right. He smiled and tucked his hands into his pockets. "Why you so intent on working with this guy? You literally just discovered he existed."

Star shrugged. "Yeah, well…he knows how to help people. And it would be so cool! We would have tons of fun, I know it. Maybe he can help me figure out this dumb wand so that my mom won't be nervous about making me queen."

Peter's eyebrows lifted and they rounded the block, coming back full circle to Peter's house. He stopped outside the door and crossed his arms over his chest. "Star, I told you, Spiderman isn't magic."

"No I know," Star promised, struggling to keep the puppies from dragging her through the front door; they still had to hide them from the landowner, after all. "But maybe if I help him out, I can learn to use mine better. Trial and error, right?"

A smile graced Peter's lips. "That's a part of science, you know."

"Perfect!"

Peter chuckled, and together they managed to wrangle up the puppies and get them back in through the rear door. Peter couldn't help but think that maybe Star wasn't too bad after all.

It was nearing one am when Star crept from her room, robe drawn tight around her middle and her wand tucked lazily into the pocket on the front. It bounced against her leg with every step, but she didn't really mind all that much. She was just thirsty, and if she allowed herself to admit it, maybe a little bit homesick for Mewni and her parents.

She tiptoed to the kitchen and rustled about as quietly as possible, determined not to wake anyone up. She found the cups easily, having helped Peter and Theresa put away the dishes earlier, and she figured that the juice would probably be in the fridge, so it was easy enough to pour herself a glass of grape juice and then slink into the living room, curling up on one arm of the sofa.

Her fingers fumbled with the remote, which Theresa had shown her to use after a brief incident involving rainbow lasers, and she flicked the television on, keeping the volume low. It had been left on the news when May went to bed, and that's where it was now, showing live footage of Spiderman helping people from a burning building. Star sat up, intrigued, and turned the volume up the tiniest bit so that she could hear better.

"-locals saying that Spiderman showed up within moments of dispatch being alerted, and without him, we're hearing that saving this many people would have been nearly impossible. Back to you, Mel."

When the camera flicked back to a woman in a plain looking room with a map behind her, Star put the television back on mute and scrambled to Peter's room, intent on gushing about Spiderman to someone.

She had never seen a hero quite like that before. Oh, sure, of course Mewni had it's knights in shining armor and dragon conquerors, but she had never heard of a hero who disappeared before they could receive praise, before they could be thanked for their work. In fact, most of the heroes on Mewni refused to leave until they were actively given some kind of praise. It was frustrating, to say the very least.

Star tapped on Peter's door as softly as she could, not sure how loud she had to be for human ears to pick up the noise, but after her third knock went unanswered, she twisted the door knob and pressed it open slowly, squinting into the darkness of the bedroom.

The blinds were up, and the window cracked, dark blue curtains drifting in the late night breeze over a rumpled, unmade, empty bed. She pushed the door open further, glancing around the room to find Peter's desk chair tucked tightly into the knee hole of the desk and his laptop humming on standby.

Peter Parker himself was nowhere to be seen.

Star frowned and backed up, shutting the door behind her and moving back to her room. She changed as she thought, going through the motions rather than being consciously aware of what she was doing. She knew May set a curfew; she had explained it to Star while she was helping her to unpack. On school nights, they had to be in by no later than 10:30. Theresa had to be home by 10, since she was younger, which Star found reasonable. During the weekends, the curfews for each of them were extended by an hour, unless they told May in advance.

So Peter not being in his room, even though it was now after one in the morning, was clearly in violation of Aunt May's rules. Now, Star herself was a rule breaker. But when it came to curfews, she understood that they needed to be followed. She had broken her curfew in Mewni exactly once and then hadn't seen Pony Head for two weeks. That had been enough for her never to do it again. Maybe Peter hadn't been punished for it before? Then again, their argument that morning…er, yesterday morning…about being late for school kind of implied that he had.

Star slipped a jacket on and crept out the back door with her wand in hand and her hood pulled low over her head. Her keys that May had given her jangled in her pocket, annoyingly loud in the night air, and she had to force herself to creep instead of run willy nilly the moment she was out the door.

She didn't really plan on going far; really, she only meant to hang out around the apartment until Peter showed up so that he could explain himself about why he had been out so late on a school night. Then again…she wasn't much better.

Star frowned at the thought and then glanced up at the sight of a figure clambering down the fire escape of the neighboring building. He had Peter's exact figure and moved the way he moved as well, though he seemed more fluid than usual.

Her feet pushed her up off the steps and she stepped back into the shadows, ready to ask him where he'd been, but when the figure dropped into the light, her breath caught. It wasn't Peter she was looking at.

It was Spiderman.

He looked ragged, if a man in a mask could look ragged, and Star could see the soot littering his costume. She frowned, ready to step out and offer help, when his head whipped up and over in her direction, the eyes on the mask narrowing. "Who's there?" he demanded softly.

Star, utterly flabbergasted at the idea that he had known she was there, stepped out slowly, her head tilted. "Just me! Star Butterfly," she laughed nervously.

Spiderman didn't relax, instead gave her a very obvious once over and intoned, lower than before, "Why are you out here?"

"Uh…I live here?" she squeaked. Now that she was finally face to face-or rather, face to mask-with the guy, all intentions of asking him to work with her were out the window. "Just…getting some air!"

She fumbled backwards up the steps and back into the house before the masked vigilante could say anything further, pressing her back up against the door and breathing for the first time in the last two minutes. A grin split across her face and she raced down the halls as fast as she dared, dropping her keys and jacket and wand into her room before venturing back to Peter's. She'd have to wait there for him, what with Spiderman lurking in the alley's. He would probably scold her if she went back out.

Star glanced back over her shoulder towards the kitchen, smirked, and then pushed the door to Peter's room open. A shuffling noise caught her attention and she whirled back around, eyes wide and tongue ready to ask Peter where in Mewni he had been.

Only to lay her gaze square on Spiderman himself, the mask clutched firmly in his hands and eyes wide on his face. Star's jaw fell and she took a step back, nose registering the smoky smell that had been on him in the alley. Her mind replayed all the taunts and teases between Theresa and Peter about Spiderman, the way he had kept insistently correcting her on the proper way to say his name, on every single detail she had captured about him on the fire escape, when she had thought Spiderman was really Peter sneaking home.

Because…well, that's exactly what had happened.

Oh, this would make being his partner so much better than before. Her grin widened.

"You're-?"

Peter grabbed her by the wrist, yanked her into the bedroom, and shut the door.

Author Note: Hello this is CMR Rosa bring you a new crossover. I a hug fan of both Spider-Man and Star vs. the Forces of Evil, I notice there were no crossovers on this web site so I decide to make my own crossover. My version of Spider-Man will have elements of the comics, cartoons, and movies in them. Also Marco Ubaldo Diaz does not exist in this story. I like that character but this is a story about Peter Parker and Star Butterfly so I had to cut Marco out, so he does not exist in this story because he been replace by Peter Parker. Those I do plan to give Peter some of Marco characterize. Reviews and criticism are welcome.

Im co writing this story with PFTones3482 and Dex Cipher

Teresa Parker is not my original character, she a semi-canon character who first appear in the graphic novel Spider-Man: Family Business as Peter long lost sister, it was left a little ambiguous on if Teresa was really Peter sister but I love the character so much that I decide to use her in this story.