"Why hello officer!" Sun said, scoping out Ruby as he entered into RWBY's dorm. The small dark-haired girl finished adjusting her decidedly un-professional police hat and turned to pose.

"I knew you'd like it!" Ruby said, looking happily to Sun. Seeing as it was her first Halloween with a boyfriend, she knew she had needed to do a cute couple's costume; also seeing as it was her 18th birthday, she had decided to wear something extra super cute, too! Twirling around, she let Sun check out her technically-a-cop outfit, which consisted of a cropped jacket and miniskirt designed to look like a police uniform, but ultimately fell into the category of a standard, "Sexy Blank," styled costume. The top even had a badge that was made to look like the one the Vale Police Department wore, plus it came with a realistic looking holster.

The reason Ruby was a cop, aside from the fact that she actually chose it, unlike when she had been, "gifted," a trash can outfit, was that she was feeling pretty happy with herself. For the first time, she had a long-term boyfriend, not to mention she was now legally an adult; all the milk she'd drunk really paid off in the form of shapely hips and a chest size at least vaguely comparable to her sister. All of that combined with her boyfriend's outfit to form what she hoped would be a very, very special night.

Finished checking out Ruby, Sun said, "Of course I like it! Now, what do you think of this?" he more declared that asked, flexing in his costume. The monkey was dressed as a prisoner in the same way Ruby was dressed as a cop; he was in the old-style striped prisoner outfit, only the shirt was open in the ever-so-familiar way so as to expose his abs. In truth, he looked a bit more like a male stripper, but that wasn't exactly a problem to his girlfriend; Ruby took notice of his ever-amazing chest and did her own scan of the thing she enjoyed.

"Aww, you two are so cute!" Yang shouted from her bed as she kicked off of it. The blonde was dressed as a cowgirl, though, like her sister and her sister's boyfriend, it was more sexy than realistic; she had the cowboy hat, but she had a tied flannel shirt that exposed both her impressive cleavage and soft stomach, plus daisy dukes that barely counted as shorts. Aside from the boots, she was pretty much just fanservice, though that was to be expected; taking the opportunity to make fun of the unexpected, she goaded Ruby further with, "so, when are you pulling out the handcuffs, sis?"

"Yang!" Ruby shouted, very embarrassed that her sister would reference something like that. "What do you-"

"-I don't want to come in," interrupted a voice from the hall. Judging from the tone, it was a disappointed Neptune.

Sun started to convulse with laughter upon hearing his pal's voice. "Oh, my god, I actually forgot! Hahahaha!" Wiping a tear from his eye, he spat out, "Brothers Grimm, dude!"

"Shut up!" Neptune cried, his manhood gravely injured.

"Oh, c'mon, babe!" Yang said with her sugary voice. "Come in! It's going to be awesome!"

"No it's not," Neptune said with the most defeated tone one could have. "Sun's already given me a taste of tonight."

"Well, Sunny here didn't see you with me on your arm! We're gonna be the cutest couple out there!"

"..Fine…"

With a weak push, RWBY's door opened and in walked a mass of brown. As Neptune stepped into the dorm, it was clear that he was the horse to Yang's cowgirl, though he looked absolutely ridiculous in the oversized, strangely proportioned costume with a bunch of lousy fake hair and a pin-the-tail-on-the-donkey style tail. As Sun clutched his stomach, Neptune raised his arms, saying, "See?" before letting them flop back down.

Yang's eyes lit up. "Oh, my god, it's perfect!" Rushing to hey boyfriend's side, she sidled up to his arm and nuzzled his face with hers, immediately cheering up the distraught horse man blob. "You look so cute!"

Mood rapidly increasing, Neptune said, "You think so?"

"Yes! SOME couples just don't know how to really make it work!" Yang said, disapprovingly looking at Sun, who was still doubled over. The blonde and Neptune's couple costume was horse and rider to Ruby and Sun's cop and prisoner, but the party would have plenty of other people.

"We're gonna be the cutest!" Ruby challenged, starting to stare her sister down.

"Calm down, you two," Blake said, coming out from the bathroom as she adjusted her hair. She was a pirate, in the sense that she was actually a pirate and not a sexy pirate. Along with a bandana, she had on a long white coat, plenty of extra belts, and more stereotypically pirate things.

"Wait, you're not a ninja?" Neptune asked.

Seeing the hilariously stupid horse costume Neptune was in, Blake paused, stifling her laughter. After playing it off as a cough, she answered, "Ha-hem… N-no. I had this coat lying around; it was Yang's idea. A ninja would be too expected of me."

"That, and she was a ninja last year," Yang said, stopping Blake's facade of being overly cool. "That didn't stop Weiss from being a fairy queen again. I don't exactly see how a pirate and a fairy queen get together, anyway."

"I'll have you know that-" Weiss called from the bathroom, still adjusting her makeup.

"My butler has been making this costume for me since I was six, re-sewing a new one whenever I outgrew the old one," Yang concluded, having heard the story many a time. There was an audible huff from behind the wall. "Some of us are creative enough to at least match our couples costumes."

"You're one to talk!" Weiss shouted. "How small are those shorts?"

"Small enough for my boyfriend to enjoy," Yang smiled, hugging Neptune's arm tighter. She was met with another huff. "Aaaaanyway, should we be going then?"

"Away!" Ruby declared, pointing dramatically up to the sky. "Forward, march!"

"That's a military general, Rubes," Yang said with a smirk.

"Or, it's the birthday girl!" Ruby replied, finger still pointing to the ceiling. "And, as the birthday girl, I say once more: away!"

RWBY plus Sun and Neptune soon were surrounded by their fellow students in costume in the ballroom where prom was held. Though spacious, it was difficult to avoid the costumes of some of the other people around; some people really went all out with their outfits, and there were all sorts of large wings, weapons, and other things to avoid as people shuffled about.

The group of six quickly met up with their other friends. Jaune was dressed as Vav, though in a matter very much fitting of the goofball, his costume fit him pretty well. It more fell in line with the crappy homemade version the helpless hero had made before getting a proper suit; whether or not it was intentional was debateable, it looked like he'd pretty much taken a bunch of arts and crafts materials and taped it to a onesie, then added a towel as a cape. Pyrrha was in an old-style toga with bits of armor, making her resemble an ancient warrior befitting of her circlet; combined with her bronze sword and shield, she truly looked the part of a warrior, though a lot of her clothing left a bit too little to the imagination, likely in a vain attempt to get some attention from a certain flag-clad hero. Nora and Ren were in their own couples costume, as they were every year; this evening saw them as two heroes from Nora's favorite comic book, though Nora was the female version of a male hero.

After meeting up and admiring (or laughing) at everyone's costumes, the group of costumed students broke off to enjoy the party Beacon was throwing. Sun followed Ruby's sweet tooth to the snack table, which was filled with plenty of trays of sweets for her to indulge in; loving cookies possible more than life itself, the sexy police officer helped herself to plenty of chocolate and candy between dancing with Sun. She'd worn boots as opposed to heels, so she actually had the dexterity to dance with her boyfriend, plus be quick enough to sneak in sweets between songs.

Ruby was having a great time, having finally found a reason to enjoy dancing, partying, and socializing in Sun. When she was a meek single girl, she never knew how to enjoy herself at parties, let alone at things like prom; now, though, she could get a little naughty with her boyfriend. Enjoying/fearing the shortness of her skirt, she played around with Sun's heart as she danced, denying him the chance to see under her miniskirt. She was wearing boyshorts over her panties because she was far too self-conscious to potentially flash other people, but it would still tease her boyfriend as punishment for having his abs be visible at all times.

Thinking very, very hard about it, Ruby really felt like a grown up. Sure, it was her 18th birthday, which meant she was legally an adult, but this was different; she felt like she had a woman's body, she had a cute boyfriend, and she was and had been feeling feelings that were nothing like when she was younger. She'd felt horny for months, but she'd been a minor. Love or otherwise, she and Sun couldn't… consummate their relationship without putting him at risk of unfairly ending up on a list. Her age and early enrollment had been a blessing and a curse; Ruby was very thankful of the barrier blocking her and Sun from having sex because it meant she could truly know she wanted it before doing it, but she'd known that for at least a month by this point. After all the waiting, she was certain that Sun was the boy that she wanted to lose her virginity to, and now that she could without worry, he'd just have to say the word.

Maybe it was the tiny amount of alcohol (as 18 was the legal drinking age for hunters and huntresses) Ruby had consumed, but she was getting warmer and slightly dizzier as the night went on. She'd only had about half a glass of punch, but maybe she was a lightweight; it had been her first alcoholic drink, so she didn't know her limits. Although, actually, it might have been the metric ton of candy she'd consumed.

Feeling the slightest bit sick, Ruby waited for the current song to end to ask Sun, "Hey, can we go? My stomach kind of hurts."

Clearly concerned, Sun said, "Sure, c'mon, let's go somewhere quieter." Taking the cop by the hand, he led her outside the dance hall so they could think without blaring music in their ears.

"Whew…" Ruby said. Though she had enjoyed the party up until that point, it was nice to get outside in the cool air without being deafened. "That already feels much better." She sat down on a nearby bench to catch her breath.

Sitting next to Ruby, Sun asked, "Are you? Was it the punch? It's your first time drinking, right?"

"Nah, I just ate too much candy I think, unless half a cup would get to me." Ruby leaned her head on Sun's shoulder. Blushing, she said, "I'm not used to parties either; tonight's been nice, though."

Awkward but pleased with Ruby's position on his shoulder, Sun hesitated before grabbing her hand. "It's nice out here."

"Yeah, it was stuffy and cramped in there, anyway."

"That's for sure. Every other second I was stepping on somebody's tail or something."

Ruby felt the cool autumn air touch her skin, reminding her of how much was on display; in her police outfit, she was currently about as exposed as she would be in her swimsuit, but this was a lot cuter. Now chilly, she hugged in close to her boyfriend.

Ruby and Sun shared a moment of silence under the stray streetlights, enjoying the muffled sounds of the party going on behind them.

Ruby's mind again wandered to her birthday. If she had been waiting for the right (and legal) moment to solidify her relationship, then Sun must have been waiting twice as long. He'd signed up with someone he couldn't immediately have, so he must truly like her! Ruby wanted to reward him for being so patient.

"H-hey…" Ruby stuttered, looking up to Sun.

"Yeah?"

Ruby took a long, long time to think. She decided that she was ready, and that she really wanted to let Sun know that she was. "D-do you want to go somewhere else?" That at least left it up to interpretation as to what she wanted to do; she didn't directly ask, but she basically gave permission for Sun to instigate. "I mean, like… quieter?"

Sun perked up, clearly interested in what Ruby meant. Interpolating her words with help from her cute face, he saw her unintentionally move down his exposed chest to his crotch. Feeling blood move down, he clarified, "Do you?"

"Y-yes. Yes, I do." Ruby got up from the bench and looked sweetly at Sun. Looking to either side, she decided to truly be brave, and slowly removed her boyshorts before handing them to Sun. There could be few other actions as direct as that; Sun was now fully aware of Ruby's intentions, and also the fact that she was wearing tiny red panties with a cute little bow on them.

It was the right night. Tonight, Ruby felt more in love with Sun than she had in their months prior. She didn't know why, but maybe it was the culmination of her womanhood, or maybe just her age, or maybe the alcohol really did get to her, but tonight was the right night.

Sun looked to either side before getting up. Seeing no one, he moved in to kiss Ruby, who eagerly reciprocated. Breaking it off right when the girl was getting into it, he grabbed her waiting hand and led her once more. Finding their way to the school, they entered a hall of classes; now far away from the party, the two young, eager partners let their emotions get the best of them.

Sun tasted strawberries and candy as he touched Ruby's lips with his own. Ruby tasted chocolate and false banana flavoring as she graced his. The taste for both shifted to tongue as they began making out in the empty halls of Beacon, their hands growing increasingly brave. Sun's greedy fingers first drew across Ruby's bare stomach before moving towards the part of her back not covered by her top. The crop top made it easy for the ripped criminal to reach up under the girl's shirt and tease her bra; letting it stay on for the time being, his hand drifted towards her skirt. Ruby, in the meantime, grew intimately familiar with Sun's bare chest, which was all hers. Being a bit more romantic, she immediately strayed towards Sun's defined ass, something she'd been caught staring at far too many times.

Only breaking away from each other to breath and bite each other's lips, Ruby and Sun fell into multiple walls as they lost any sense not absorbed by each other. The only feeling was the other's skin, the only sound the other's desperate gasps for air, and the only scent that of love, candy, and sweet sweat.

Sun finally found his way under Ruby's skirt. Going from under, he drew up the back of her leg until he reached her butt; touching and enjoying the girl's squirms as she shifted around, he felt the lace edge of her panties that conformed to her shape. Deciding now was the best time, he broke away and face his girlfriend.

Sun looked at Ruby deep in her silver eyes to find his gaze matched. Both faces were absorbed in love and lust, and Sun looked down to the girl's top. Reaching for it, he found her buttons before becoming more conscious of his surroundings; though they were far from the party, they were in the hallway of their school, where someone could walk by at any time. Still clumsily stumbling around with their bodies almost meshed, the found a door that led to a classroom, and threw it open in order to fall away into privacy.

"Oh-oh, my god!" a familiar voice shouted in surprise. As Ruby and Sun quickly broke off of each other in surprise, they realized that they weren't the only people to have the idea to branch off from the festivities.

Inside the classroom were two others, the interrupted pair already in the process of exploring each other's secrets. Yang was currently on top of Neptune, in hindsight obviously riding cowgirl. Whereas Neptune still had his horse costume on save his pants, Yang's top was untied, letting her large breasts bounce up and down as she realized her full costume potential; while her jean shorts and panties were off on the floor, the flannel-clad cowgirl still had her boots and cowboy hat on in addition to her undone top. Existing as and practicing cowgirl, Yang had been bouncing around Neptune's cock as she allowed it to penetrate her womanhood. The horse man also released a hand from the blonde's breasts, having only a moment ago been fondling his riding partner. The cowgirl, now having stopped grinding, currently had her boyfriend's throbbing erection inside of her, which her sister and her boyfriend were currently watching.

Clutching both sides of her open top together, Yang tried to cover as much as possible as she realized with horror that not only did her sister interrupt her mid-coitus, but she also did so in an attempt to lose her virginity to her boyfriend. Trying to decide on how to proceed, Yang shot up, trying to cover her dripping womanhood with her short top before removing her cowboy hat and using it as a block. Neptune resorted to pulling off his horse hood-mask and using that to hide away his erection, still wet with Yang's fluids.

Yang stared at Ruby, who stared at Neptune, who stared at Sun, who repeated the cycle. Ruby had never been more thankful to have clothes, but had never been in a more awkward position than staring at her sister try to cover herself. Yang was crimson from both sexual pleasure and humiliating awkwardness, matching Neptune's sweating face. Sun, also thankful he was still dressed, feared for his life, as Yang now knew he was ready to take Ruby's virginity.

There was a long, palpable tension as the four costumed (Well, mostly costumed in some cases) students looked at each other, trying to figure out the best way to end the night without having horrific mental scars in the morning.

The door to the classroom once again blew open as a third couple burst through in a mess of white silk and fairy wings. Yang, Neptune, Ruby, and Sun watched as Blake and Weiss stopped making out, realized that their friends were watching, and removed their hands from each other's breasts. Blake's pants were already off, revealing a pair of pure white panties with blue lace that were very unlike her to wear, while Weiss' dress was pulled down from her chest, revealing a purple and black bra (And formerly, Blake's hand).

Neptune twitched as he came from the edging of not finishing inside of Yang, and from seeing two girls about to have sex blow in through the door.

Ruby held off on losing her virginity for a while after that night. It was NOT the right night.