A/N: My first RWBY fanfic! Read if you dare, judge as you will, and don't forget to review! I don't know if I'll continue this or keep this a one-off, it'll depend if you guys like it or utterly despise it. Above all else though, have a nice read.

Or don't. Your choice.


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A Heated Moment

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Blake wasn't one who considered Yang to be her type. They were utter polar opposites in every capacity. Names, personality, appearance, color palette, fighting style... it wasn't a lie to say that it was like (no pun intended) yin and yang between them. Really, it was baffling that they were good friends to begin with (though Blake liked to associate that little tidbit to her sister. For Oum's sake, she was beginning to like a Schnee!) though it wasn't like she was complaining or anything. Despite the differences, Blake... well, could she say that she liked her? Fond would be a bit of a weak word. Tolerable, maybe?

No, that's just a bit insulting, even for Yang.

... Maybe.

Well, whatever the case, they were friends. Yang would stick her neck out for Blake, even going as far as to risk her own life for the faunas girl on several occasions, and she'd undoubtedly do the same for her. No questions asked.

Of course, while their initial friendship was all fine and dandy, there was something... bothering Blake. A foreign emotion. It wasn't a negative one, but on the other hand wasn't entirely positive either. Did that even make sense? Hell if she knew.

It was the weekend at Beacon Academy, which meant no classes and a whole forty-eight hours of free time. Ruby had been unwillingly whisked away by Weiss to go to heiress's homeland of Atlas. Presumably, she wanted to teach their unfortunate leader a little culture and dignity during their vacation (a fruitless effort, but then again it was entirely out of Blake's hands or interest.) Jaune and his team as a whole had left for Vale and wouldn't be back for hours, so that just left her and Yang. Blake herself had planned to use it to catch up on the mountainous stack of books placed by her bed, while Yang was doing... well, something. The blonde fighter hadn't specified her plans for the weekend, though it looked like she was getting ready for something important. She sat in front of an ovular mirror, humming to herself as she brushed her damp golden locks while wearing nothing but a white towel, as she had gotten out of the shower just a minute before.

Now, while Yang wasn't doing anything out of the ordinary, it was Blake that felt strange as she looked at her. The faunas had been trying to read the newest volume of Ninjas Of Lo- Wait! No! Nonononononono! What she meant was that she was catching up on a completely SFW non-lewd biography of some important historical figure that she couldn't specifically think of. Yes!

... In any case, Blake found it very difficult to focus on her book, instead finding herself to be utterly transfixed on her friend for... some reason. She just stared at her, for no good reason.

"..."

"Hm hm...~"

The blonde bombshell was too fixated with her hair to see what Blake was doing, which was just staring. Was it creepy? Likely, since Blake never had a real reason to stare at her before. That wasn't to say her teammate was unattractive, she could turn gay men straight and straight girls gay with her looks, but Blake already had an established image, and a pervert wasn't one of them.

Pay no attention to her literature collection to keep her established image a reality.

"Hey, Blake?" Yang spoke up suddenly, breaking Blake out of her thoughts.

"H-Huh, what?" She put her 'novel' down to make eye contact with her, as the girl was tying her blonde hair into a ponytail. For some reason, Blake's face felt hot as she looked at her. Did it get hotter in the room all of a sudden?

"You wan't anything while I'm out in Vale? A book? Two books? Three books?" Blake's eyes narrowed at the huge grin on Yang's face, before she took off her tow- HRK! "Daw, don't look at me like that, I was just messin'"

"... Y-Yeah." Okay, something was going on. She'd seen Yang naked before, not intentionally, and she never had such a heart-stopping reaction to seeing Yang bared like that. Calm and level, Blake. Calm and level. "Well, if you're being serious on that offer..." The two shared a glance at Mt. Book, which looked dangerously close to toppling over. "I could use a new bookcase."

"I'll keep that in mind." Yang acknowledged, as she slipped into some underwear. Black lace... huh, Blake never noticed that before. She supposed it fit Yang's exhibitionist side, and it lay barely obscured as she slipped into her usual outfit.

Stop staring.

"If you don't mind my asking, where are you going exactly?" She decided to distract herself by initiating a conversation.

"Eh, nowhere in particular. Just figured I'd go on a night on the town. Visit a few gyms, eat at a diner, wreck another bar, maybe beat down some criminals if I see 'em. You know, typical night."

"... Sure, why not." Well, that was a total bust.

"I'll be back in like... three hours. Four tops. Try not to have too much fun while I'm gone."

"I'm just bursting through the wall with anticipation." Blake deadpanned. Yang laughed, and vacated the room.

"..."

Well... that was weird. She never felt that way towards her teammate before, and something like that concerned her. It didn't feel like embarrassment, more... wanting? Desire? Lust even? That was indubitably the case, she knew it too well. Feelings that were described beautifully and in such intricate detail in her 'novels' were perfectly replicated onto how Blake was feeling at the moment, and all from just looking at Yang? It baffled Blake. Emotions like those were very worrying for a good number of reasons.

A) Unlike most her age, Blake had never dealt with issues such as 'romance' or 'sexual desire' on a personal level, that's what her novels were for.

B) Said desires couldn't exactly be tended to effectively in a place like Beacon. It was the school that trained Hunters and Huntresses, future protectors, not a place for lewd exploits.

C) Even if Blake could have somehow bypassed the second reason, she still shared a room with two other people, one of which was younger and much more innocent and carefree than the other three combined. Destroying that innocence would be an irredeemable act of sin, not to mention incurring the wrath of the one she was currently obsessing over, so... yeah.

Overall, she didn't have much to lean on, though that still begged the question... Why? What happened to make Blake feel so much for someone she, at best, considered a good friend and a valued teammate? She herself wasn't even particularly interested in girls, but the abnormal interest in her blonde companion was deeply concerning nonetheless. She needed an explanation, and by Oum's name she was going to get one!

"Okay... well, I guess I can look this up on the internet." That was the best course of action, so Blake whipped out her scroll and went to work. She found her way to the search bar and rapidly pressed her fingers against the digital keyboard to see what she could find. No, not porn, but faunus facts. Particularly cat faunus. She needed to know why she was feeling the way she was, why all she could think about was Yang, and why she started feeling a wet spot growing in her crotch area. Crossing her legs, she conducted her search.

"Let's see... evolution of Faunus... faunus biology... ah, this should do it." Blake came across something that could be helpful. "'The biology and health of a typical feline faunus is, obviously, vastly different from their animal counterparts, but there are certain traits that remain. The most important of these traits is the infamous estrus cycle, in which a female cat will experience the desire to mate with a male for reproductive purposes. While this cycle is shared between the animal and the faunus, the latter experiences it quite differently."'

'Oh, son of a- Ugh, alright, what do you got, website?' Blake thought to herself.

"'For one, a female feline faunus experiences estrus, or 'heat' as it is commonly called, with only one specific partner. The choosing of this partner is rather unorthodox, since the choosing depends solely on the first person a feline faunus will look at when the first stages of estrus begin.'

'I only looked at Yang today... Ruby and Weiss were already gone when I woke up...'

"'Furthermore, the feline faunus experiencing estrus will find themselves devolving into an obsessive state over the one that they desire to mate with. Hormones will make a major influence here, until the only thing the feline faunus would think about is their mate and being intimate with them, until the act is performed."

'Well... that explains that...'

"'Lastly, estrus in a feline faunus can last up to 4-6 weeks at the least and is a regularly seasonal cycle. It is highly recommended that the feline faunus mate with their partner at least once or twice a day to keep their lust in balance, either until the end of the cycle or when they reach adulthood. Intercourse with another partner or masturbation will only make the condition worse, and increase the want for their one and only partner until, again, the needs are met.'"

'... Oh, you have to be fu- How does that even work?!'

So, in order to keep her hormones in check and to get rid of her ever growing lust, she needed to have sex with Yang. Oy vey... There was no other way she could approach it. No loopholes, no anything convenient to overcome the issue. She would have to tell Yang about this, and they will have to do something about it. Just thinking about being intimate with blonde, it made Blake's stomach hurl. She could barely contain the excitement that formed deep inside her. Blake sighed wearily and closed her scroll, letting it drop onto the carpeted floor. According to the clock, Yang wouldn't be back for another three and a half hours, and there was literally nothing Blake could do to keep her mind off Yang. She was far too horny to leave the room, lest she start tackling other students and being 'intimate' with them, which would only worsen her condition according to the website.

"..."

Yeah, waiting for three and a half hours wasn't going to cut it. The cat fauns snatched her scroll from the floor and speed dialed Yang. It took a few minutes for the blonde boxer to answer, but when she did, she looked confused, understandably.

"Blake? What's up?" Yang looked like she was parked outside of some sort of club, wearing her usual biker outfit, topped with sunglasses.

"Yang, where are you?"

"Uh, outside Junior's. I just stopped to meet an old friend from Signal, maybe hitch her off to someplace else before his goons see me and flip." She grinned, making Blake roll her eyes. "Why, something wrong?"

"Er... somewhat."

"Somewhat?"

"Look, I just need you to get here as soon as you can. It's... pretty important."

"How important?"

"I'll tell you when you get here. I'd rather not talk about it while you're in public."

"Uhhh... sure, I'll be there in five minutes, guess Jade will have to wait. See ya."

"Bye." Soon after that, the call ended, and Blake was left to sit and wait for Yang to return.

"..."

Of course, it didn't help that five minutes felt like several eternities considering the mood she was in.


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Five minutes later...

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"I'm back!" Yang returned, bursting through the door and closing it with her foot.

"Hi, Yang." Blake smiled and greeted her friend from her bed, doing her absolute best to hold back her urges for the time being. "Sorry I had to make you abandon your plans for this."

"Well, I'd be more forgiving if you told me why you called me back in the first place." inquired Yang. "I had a lot of plans set up, so whatever this is better have a good reason behind me having to cancel on Jade, or I may not be too happy."

"Yes yes, and I'm sorry again, but... well..." Blake suddenly flushed. "Er, well... s-sit down." She patted to a spot next to her. Yang gave her an incredulous look, but complied to her request and sat on the edge. "Okay..."

"Are you alright? You look like you're about to throw up." Her blonde friend sounded quite concerned. Oh, if she only knew how close to the mark she hit.

"Uhh... o-oka- Okay! There's... no easy way to say this. I don't think I could approach this in a better way if I tried."

"... What is it?" Yang went back to looking mystified. Considering the circumstances, Blake was convinced that Yang was thinking she was going to confess her love to her.

"Well... to put it simply..."

One embarrassing explanation later...

"... a-and that's pretty much why you're here now."

The B and Y of team RWBY sat in complete, deafening silence after Blake's 'simple' explanation. Yang, in particular, looked as if she was having war flashbacks after what Blake told her. It's not like Yang could refuse, either. Blake could only imagine what would happen if she were left without a proper way to vent for too long. It'd be like a recovering alcoholic being shoved into a bar that served free beer, in due time that person would cave, and Blake's chances of going on for much longer were reaching slim levels as it were.

"So..." After a lengthy few minutes of nothing but silence, Yang sighed and finally decided to speak. "Let... let me see if I got this straight."

"Go ahead."

"You're experiencing estrus for the first time, of which could last to four to six weeks at the minimum."

"Yup."

"The only way you can relieve yourself of the inane sexual desire you're likely feeling right now is... to have sex with me once or twice a day."

"Correct."

"There is literally no other way around this, and I have no other choice but to oblige to this, otherwise your health can and will be in serious only to you, but to others as well."

"That's right."

"Lastly, this is going to be a recurring seasonal thing until you reach adulthood, so I basically have to be around once or twice a day, for weeks on end, leading into several years, to tend to your sexual urges until this cycle is done and we can, but probably not, put this behind us."

"Basically."

"...Okay." Yang nodded, sighing once again. "Well, this is one helluva way to start the weekend, I'll tell you that." Blake offered her friend an apologetic smile, though she knew that it wasn't doing much to help. "I want to be mad right now, but this sort of thing is totally out of your control. It's just by some ultra cosmic coincidence that I'm the one you had to end up lusting over, huh?"

Blake could feel the annoyance and condescension of Yang's tone punch her in the gut. "I-I'm sorry, Yang. I wish there was another way around this, I really do. The last thing I'd want is to put you in a situation like this."

"I know, I know... Ugh, well... I'm not the type of girl that'd just have sex with just anyone, especially more than once, but this clearly..." Yang's gaze centered to Blake's crotch. Bewildered, the cat faunus followed, and she noticed a rather large wet spot, looking as if she wet herself. Blushing, Blake crossed her legs. "... is a serious issue, so I can let this pass."

"Yang... thanks for understanding."

"Not that I had a choice anyway, but whatever." Yang got up from the bed, gesturing to the door. "Alright, come on."

Blake raised an eyebrow. "Where are we going?"

"Well, we clearly can't do this here, I kinda don't wanna be expelled, so I'm just gonna ride us to a nearby hotel." Yang sighed again. "It's convenient that it's a weekend..."

"Right, right..." Blake nodded and stood up with her. "Wait, are we going to stay there the whole weekend?"

"If we have to..." Yang looked down again. "Err...but you may want to change your underwear first.'

Once again, Blake blushed profusely. "Y-Yeah..."

Ten minutes and a fresh pair of tights later, the pair had left their dorm and made quick haste through the near empty hallways. Nearly all of the first-year students, and some second-years, had left the Academy entirely to use the weekend to their fullest, the only ones left behind being the professors and a large majority of the third-year class, who had learned to use their time more wisely, either to study or train. Blake, being Blake, had planned to catch up on the latter, and... well, you know the rest.

"Good thing mostly everyone left..." murmured Yang. "Maybe we can get by without some idiot seeing us and starting rumors."

It just occurred to Blake how cautious and careful Yang was being. She only just noticed that the blonde fighter had grabbed her right hand and was leading her through the empty halls, stopping every single minute if she heard something even slightly suspicious. Under normal circumstances, two comrades from the same team walking down a hall together would've been far from devious, but putting Blake's 'condition' into play, it was a whole different ball game. Blake couldn't really blame Yang, but it still felt a tad ridiculous.

"Miss Belladonna, Miss Xiao Long." A familiar voice greeted them as they exited the halls towards the main courtyard, causing Yang to freeze completely. Before them was Beacon's stern female instructor, Professor Goodwitch. She stood with her arms crossed, expression suspicious. "Going somewhere?"

"Yeeeeah..." Yang tried to sound as casual as possible, so of course she failed miserably. "Me an' Blake are going out to Vale for the weekend. Got nothin' better to do with Ruby and Weiss in Atlas." For some reason, she was using a lot of apostrophes.

"For our shared sake, I hope it's nothing devious." Goodwitch's sternness didn't let up. "Whether a full team, half a team or even as individuals, you four never fail to stir up commotion and/or trouble in any fashion imaginable." The older woman sighed. "Promise me you two won't cause anything troublesome. After Mountain Glenn and the near deathly security breach last week, I've been... on edge when your team is concerned."

"... We can only promise to try." said Yang.

"... That's the best I'm going to get out of you, isn't it?" The duo nodded. "Well, I suppose I'll know if you caused any trouble via the news. Carry on." With that, the Professor left them, and Yang quickly pulled Blake along yet again. It took less than a minute for them to find her yellow motorbike parked outside the school. They got on, Yang obviously driving while Blake had to sit behind her.

"You're an awful liar, you know that?" Black commented dryly.

"Just one thing before we take off..." Yang revved up, sliding on her goggles coolly while ignoring Blake's insult in the process. "I get that you're insanely horny right now, but for the love of Oum, please don't try anything funny on the way to the hotel. No groping, no humping, nothing like that, got it?"

"... I can only promise to try." Blake grinned slyly, earning an eye roll from Yang. "Trust me though, it's taking all that I have just to not pounce you out here as is."

"I believe that, but enough talk, let's go!" With that said, the duo rode off into the streets. Blake had to lean onto her friends back and wrap her hands around Yang's exposed hips, since her friends particular method of driving was risky to say the least. Still, it got them to a nearby motel in under a few minutes. Blake could already feel another wet spot growing with how close she had been to Yang during the ride, and her blonde partner could obviously see that as they got off the vehicle

"We're almost there, just hold on for a bit longer, alright?" Blake nodded silently, and so they made their way inside the building. Mercifully empty, Blake crossed her legs while Yang approached the bored lady behind the desk.

"Room please, any old one will do."

"Yeah yeah, just sign there." Said lady was too preoccupied with her scroll to pay any close attention to them, as she lazily pointed at a book with a pen on it, then went back to what she was doing without so much as batting an eye. Yang did so in haste. "Room #69"

"Oh come on..." Blake's tone was akin to a mental eye roll at that weak sex joke. Either way, Yang got the room key and they went off. It was only a matter of time before they were in the generic hotel room, her friend shutting and locking the door, resigning them alone for the night, with each other.

"... I guess this is where we start, huh?" Yang's face resembled a tomato wearing a blonde wig, possibly more uncomfortable with the situation than Blake was. "Well, I don't think I need to say this, but I just wanna let you know that all of this isn't roman-"

"I know, I know." Blake cut her off before she could finish the 'R' word. "Let's be honest, nothing about this could even be considered close to that. You're literally going to have sex with me to keep my animal-driven estrus in check, for who knows how many weeks, until I 'mature.'"

"Heh, you make it sound so easy." Yang shook her head, making sure to close some beige curtains to keep peekers away. "Well, there's no more dancing around this, so... you know, get naked."

"You sure have a way with the ladies..." Yang scoffed at Blake's sarcasm, but the faunus girl did as she was instructed. She stripped out of her normal outfit, sans her bow, and laid herself on one of the two Queen sized beds. It wasn't easy at all to keep her breathing in check, her heartbeat being a total lost cause. Once Yang was done making sure nobody could see them, she followed after Blake and slipped out of her clothes, leaving herself bare nude.

Blake had seen Yang naked before, but in a scenario like this, it felt like she was looking upon the nude body of a goddess. She wanted so desperately to grab the girls hips, slam her onto the bed with her and utterly ravage her body until she was satisfied, but by the time she started thinking up alternate scenes, Yang had already crawled on the bed and positioned herself so that she'd be in a perfect lock with Blake's own body, and then lowered herself so that their naked bodies pressed against each other.

Blake's heart was exploding, so was her face in pure, unadulterated embarrassment.

"Are you ready?" asked Yang.

"... Y-Yes." Blake barely managed to choke out. With that last sentence, Yang kissed her, and the two would spend the evening and eventual night in each others embrace. For Blake, it was the greatest feeling, a high like no other. Nothing could even compare, not by a mile, to the pleasure she felt that night with her willing, yet entirely unfortunate partner.

In other words, it was pure bliss.