A certain day-to-day rythm had set in after joining Fairy Tail for Yang. Wake up in the Fairy Hill dorms, eat breakfast with her sister, shower, greet the Guild's kids that really seemed to like both her and Yin, train, occasionally take a few missions (only under S rank due to some strict Guild rules), eat dinner at the Guild while watching a brawl. It was nice. About as nice as staying with Yasaka was, just minus the nice massages and weird flirtatious comments that went over her head.
It was another evening after dinner when some of the Guild's newer kids came up to her. A boy and a girl, both with white hair.
"U-Umm.. excuse me, Miss?" The boy, shy and a bit timid called out, almost shrinking when Yang turned to look at him while chugging some fruity achoholic drink.
"Ah! You guys are.. the Strauss kids, right?" Yang asked with a smile, fully turning in her seat to get a good look at them.
They were cute kids. The boy was a bit taller than the girl but the girl looked way more assertive. Her short hair and face gave her a tomboy kind of vibe. The girl, Lisanna, patted her brother's back and nodded.
"That's right! Wow.. we only just joined a few days ago. I'm impressed you remembered our names, Miss Yang!" Lisanna exclaimed, a cute and earnest smile on her face.
Yang grinned and pat the both of them on the head, "Just call me Yang! So, what's up? You guys look like you need something."
The brother, Elfman, smiled shyly and nodded before turning his gaze to a little girl, around Erza's age, sitting in the back wearing a cloak that covered her body. Her white hair made it evident she was related to Elfman and Lisanna.
"We.. We need help. Our older sister is probably gonna try to leave us here in Fairy Tail because she thinks she's a monster.." Elfman stated, a whimper escaping his throat.
Lisanna nodded, "We talked to Master and he says this is just her Takeover Magic but Mirajane won't listen. Ever since we had to leave home, she always hid her arm. But we know she's not a demon! It's just magic."
Yang hummed and looked over at Mirajane sympathetically. She saw the demonic looking arm through the cloak and understood. Magic connected to emotion and if Mirajane hated and feared her own magic, it more than likely created this issue for her.
"It's Takeover magic huh? So it's transformation. She can use takeover magic on demons and stuff, yeah? Have you guys tried to learn Takeover magic yourselves?" Yang asked with a little grin.
Elfman and Lisanna looked at each other and shook their little heads before turning back to Yang.
"Well what better way to show your sis that she's not a monster than to learn the same magic she has? She's all self depreciating but she loves you guys, she'd never think you were a monster. At least, that's kinda the vibe I'm getting as a fellow big sister anyway." Hearing Yang's assessment, Elfman and Lisanna nodded enthusiastically.
"Y-You're right! But how do we learn..?" Elfman asked.
Yang looked over at Makarov, who was dozing at the bar. Lisanna instantly understood her meaning and bowed her head in thanks.
"Thank you! Now we know what to do! Cone on, Brother!" Lisanna dragged her brother behind her and ran over to a sleepy Makarov.
Yang knew she could probably try to help Mirajane herself. Maybe show some Dragon traits to help her understand it's the person inside that matters. But doing so wouldn't be as impactful as having your family back you up. And she knew that if she were in the same situation, having Yin show her she wasn't a monster would hit home the hardest.
Yang then stood up, stretched and gave Makarov a little knowing smirk and returned to the Fairy Hills dorm. She would have shared a room with Yin, but in her eyes, her sister acted weird whenever they were close or slept together. Yang just blamed puberty and laughed to herself about how much more 'mature' she was as she bathed and went to bed..
[Notice! Happy Birthday! You have officially fully become an Adult Dragon. As such, your heat cycle will officially begin starting today]
Yang woke up to a weird message, sitting up and wiping her face slowly, she felt a strange new awareness and feeling within her. A bit muted though it may be.
"Weird.. is that like the thing all the girl cats in our neighborhood get? I hope I don't get all bitchy.. or piss everywhere to mark territory. Oh wait.. I don't actually need to piss. Hah! Score for Dragon Heat. This'll be easy.." Yang yawned and stood up, pulling her white panties on, then her flexible yellow tube top.
But unlike usual, there was a certain lingering feeling radiating from her core and breasts that hadn't been there before. It wasn't too bad and could be easily ignored though.
After she got dressed, Yang fixed her hair in a mirror and winked at herself before stepping out. Several little girls ran by, all seeming eager to get to the Guild for breakfast. Cana, Ultear, Erza, Lisanna and Mirajane came running down the hall.
"Woah! What's the rush?" Yang snickered.
"Yin is singing today! She went to grab a guitar from the shops in Magnolia last night and promised to do that 'karaoke' thing with us." Erza stated, easily overtaking Cana and Mirajane, tying for first place with Ultear.
"For real? I gotta see that.." Yang barked out a laugh and followed after, ignoring the heat rising to her neck and face at the thought of her twin.
Yang got to the Guild last, stopping at the front door with an uncharacteristic hesitation in her steps. She felt a strange fluttering feeling in her belly. One she didn't quite understand as she opened the Guild doors and saw the crowd of mages surrounding one table while drinking and cheering.
"Ah..." Yang's jaw hung open as she watched Yin, sitting on a table and playing a magical guitar.
Something that was pretty innocuous, usually. But now she noticed. The long, wild, glossy black hair, the sharp and mature crimson eyes, the beautiful mature face, lush lips. Then Yang looked down and had to grab onto the door to stay standing. Perfect curves and sculpted muscles in a leotard, fishnets, waist cape, cropped jacket and gloves that revealed a decent amount of cleavage and thick thighs.
'Oh my fucking god.. Am I just now realizing how absurdly hot she is? Wait.. That's your TWIN! Wait again.. is this how Yin's felt when looking at ME? Oh god.. Okay! Just need to mentally recover and I'll be good.' Yang fought down the redness in her face and took a few deep breaths.
Then, Yin started singing. Some sort of shanty that got the jovial mood going. But just hearing her sister's admittedly beautiful voice sing made Yang hyperfocus on Yin. Walking right up to the table as the guild cheered, drank and ate.
Yang hadn't even realized when Yin finished, she had grabbed onto her hand, fingers intertwined with hers.
"Yang..? Are you-" Yin set the magic instrument down and noticed Yang's eyes, glowing crimson and fixated on her.
Then as soon as she moved closer, she smelled it. Instantly, she knew Yang was in heat. In the very beginning stage but still, things were going to get hot and heavy in moments.
"Hmm? Where are you guys off to? I thought we were going to do that karaoke thing?" Erza asked as Yang started pulling Yin along behind her.
Yang either ignored her or didn't bother replying, her pace quickening as she made her way to the door while pulling Yin along.
"Ah.. sorry. I'll do it later. Something's come up but don't worry. I'll see you in uh... maybe a few days-" Yin explained even as she was pulled out of the guild by a surprisingly assertive Yang.
"I need... I need to touch you...." Yang said, almost growling as she sped up and pulled Yang over to where they had trained, the sheer speed and force of her legs destroying part of the street until they left Magnolia and ended up on one of the mountains they had destroyed a few times.
"Yang.. take a deep breath. I know it's hard to control right now-" Yin gently rubbed Yang's back before her blonde twin spun around to face her before her back was softly pushed against the mountain's surface and her lips were sealed by an increasingly assertive Yang.
[R-18 starts below. Warning: Futa but it won't really be relevant to the story. Penetration's fun and toys just barely scratch that itch, y'know? Enjoy!]
Yin felt herself groan as Yang's lips crashed into her own. It was raw, passionate and carried equal parts love and lust in it. Yang's tongue eagerly breached her lips, tasting and moving against her own in unsteady swirls and prodding.
"Mmmfh.." For the first time, Yin felt herself in a submissive position as Yang kissed her feverishly, her hands smoothly cupping her heavy breasts and ripping away the leotard to expose her fair skin and rosy nipples.
After a full minute of exploring her mouth, Yang pulled away, her long tongue dangling out of her lips as both she and Yin panted with flushed faces.
"Haaah... haaah..~ Yang.." Yin moaned as Yang pressed herself against her more, hips grinding into Yin's while her hands groped her absurdly soft and large breasts, thumbs rolling over her nipples thoroughly.
Then, she closed in on Yin's neck and started planting open mouthed kisses on her pulse point, feeling her twin shiver from the arousing sensation. Her hands then switched from her breasts, to cupping the soft and somehow firm globes of her ass, where she groped and spread them while rocking her hips into Yin's faster and harder, cracking the mountain walls with every thrust.
"You're unreasonably sexy, Yin.." Yang groaned as she pulled away from Yin's neck, leaving behind dark mark in she shape of her lips while a glistening line of saliva fell from her lips.
"Speak for yourself.." Yin replied huskily, wrapping her legs around Yang's waist and palming Yang's own heavy breasts.
Yang felt herself groan as Yin's skilled hands pulled her tube top down and started playing with her breasts too. It was clear she wasn't going to just submissively take it without touching Yang back. She could see it in Yin's now purple eyes, she was just as excited to touch her as she was.
"Yin..~" Yang kissed her sister again, both of them removing each other's clothing quickly via the system's inventory.
Yang, briefly lost in the sensation of feeling Yin's wet heat briefly make contact with her own, felt Yin pull away before sinking to her knees, face inches from Yang's hairless pussy.
"Look at this~ How wet you are from kissing and groping.." Yang looked down at Yin's seductive smirk, watching in growing excitement as she started kissing her groin, but just outside her pussy, teasing her.
"Mmmfh... Yin..." Yang cried out pleadingly, holding the back of Yin's head while biting her lip.
Yin smirked again, her index and middle fingers spreading Yang's sex, watching the love nectar coat them with an incredibly aroused look in her eyes. Then, wasting no time, she unfurled her long tongue and started dragging her tongue up and down Yang's pussy.
"Oooouh... Fuck...! More... I need it.." Yang moaned, fingers closing around Yin's hair as she thrusted her hips and started fucking Yin's face.
"Mmmfh! Mmmgh..~" Yin let loose a few surprised but amused muffled noises as her tongue stretched out and filled her twin's pussy.
It tasted indescribable. The heady aroma of sex and something uniquely Yang filled her taste buds and nose, given Yang's humping had ensured her clit was pressing right up against it. Yin almost felt drunk, with how fuzzy her head felt. Her own pussy dripped with each clenching of Yang's folds around her tongue that tried to milk and keep it inside.
"Mmh- MMfh..-" Yang's eyes rolled back as her sister's skilled tongue snaked its way in deeper and pressed against a spongy, soaked spot within her that made her toes curl. Her hips moved automatically, fucking Yin's tongue and face like she was using a sextoy.
*Squish~* *Squelch! ♡*
Yin loved every second of it. Her own moans providing extra vibration that made Yang's pussy strangle her tongue before her face was covered in Yang's warm nectar.
"FUCK..! Yin! I love your tongue soooo fucking..... MMMMMNN!" Yang gasped, hunched over as Yin sucked and licked at her sex, even through her explosive orgasm.
After several more seconds, Yang released the hold she had on Yin and looked at her face, soaked, panting and flushed with arousal. Yang, in a daze, pushed her back against the floor of the newly created cave they made with just foreplay, her fingers sinking into Yin's pussy as she sat, straddling Yin's belly.
"Ahh~" Yin cried out as Yang's fingers sunk in, feeling the tight, wet walls close in on her like a possessive lover, almost like they wanted her to stay.
Yang took her dew-covered fingers out and slowly sucked them while seated atop Yin. Her breathy sigh telling how amazing the taste was.
"I'm gonna fill you up, Yin.." Yang muttered, both of their Draconic features emerging, one black, one white.
[FUTA WARNING: SKIP if you dislike or don't wanna see Yin get dicked down]
Yang spread Yin's legs, the power of creation flashing over her crotch as a soft yet long golden and white scaled cock materialized over Yang's groin.
"Haah.. of course this is what your first creation is~" Yin snorted, though gave Yang an extremely rare shy smile.
"Hehe..." Yang chuckled, feeling Yin's cheek lovingly as she pushed the new appendage in and felt her whole body tremble in bliss.
"Fuck.... you feel so good.." Yang groaned as she pushed herself in all the way to the hilt, feeling every wall suck and strangle her cock as she started moving, her mouth latching onto Yin's left nipple while her hips moved in and out.
"Mmmmmm.... I've..-ahh- never been a bottom... but for-aaaah.. yes..-you? I'll..." Yin was cut off by a sharp gasp as Yang's hips picked up the pace and started properly fucking her into the mountain cave, making the rocks deform and crack with every thrust.
Yin bit her lip, having lost all ability to properly talk as Yang thrusted deep into her, her tip hitting her cervix with every thrust like a kiss. Yin felt her legs lock around Yang's waist as she was fucked in a mating press position.
*Plap! Plap! Plap! Plap! ♡*
"Yin... Yin.. I love you... so fucking...-..much..! Nngh!" Yang croaked out between the rapid sounds of wet flesh slapping wet flesh.
"Nn.. Need to say it... 'fooore I lose control... aaah..." Yang continued before Yin captured her lips, sucking on her long pink muscle as she ground her hips back upward into Yang.
"Dummy.....-Mmfh!- That's obvious... I-ahh..-love you too.. more than anything.." Yin replied, before the mountain shook.
Yang thrust her hips harder and faster, kissing Yin like a woman possessed befors both let out feminine moans and climaxed.
*Splurt!* *Splurrt!~ ♡*
Yin's back arched up as she inhaled sharply, the proximity to Yang making their large breasts press together as love nectar and Dragon seed coated their thighs, groins, abs and even reaching their faces in droplets.
Yang shuddered, slowly pulling out of her twin as the created Draconic member faded into particles. She looked disappointed for a second, until Yin pressed her back against the crumbling cavern's floor while licking her lips.
"It's my turn now..~"
[AN: IT'S HERE! HEAR YE HEAR YE! I hope you enjoyed. I tried to make it as good as I could! And can we get the PS to 400? If we do, I'll do another YinxYang chap sometime in 10 chaps]