Alright, there's really only one Tentacle thing for RWBY, so lets make it two. The other one is really good and I am a huge fan. I hope no one considers this a copy of it, but it's going to involve Grimm and tentacles. Only so much you can do with that. I'll try to keep mine as unique as possible without stealing anything. If it does look similar please let me know. As well as any suggestions or requests. I'd love to make it more enjoyable for the reader. This is rated M for a reason, it's going to have adult subject matter. If you're at the age where you need to ask your mom to use , this isn't the story for you. (Ruby and Yang)

It was a dark night in Vale, a storm ragging though out the kingdom as the streets were abandoned, everyone staying indoors as the storm rages on. The city experiencing power outages every so often, Cinder Fall was in an abandon warehouse, about 50 White Fang members with her, doing various tasks. She had her own office set up near the back of the structure, candles lighting the room until power was restored, she was sitting at her chair with a map of Vale in front of her as well as where the Vytal festival was taking place, and the fairgrounds. Neo, Mercury, and Emerald were joining her as they discussed various plans to attack the Vytal festival, the symbol of peace after the great wars. She knew what the goal was but they were all clearing up any details, Cinder deciding to use Grimm as well as the Atlesian knights to over throw the Festival, killing all the Huntsmen and Huntresses inside. But it would take a lot of skill and a team to infiltrate the Festival, for which they already were registered to participate in, having Neo get a slight change in outfit and hair colour. The plan was in motion.

As the storm passed and the morning sun burst through the clouds, it was the day just before the Vytal festival tournaments were scheduled to begin. Team RWBY were helping set up the fairgrounds with many other teams and staff at Beacon, as well as Atlesian knights. Ruby sighed as she set down a crate marked 'Fragile'

"You know….for something marked fragile it sure is heavy" She sighed before looking back to Yang who was carrying a similar crate, only 3 times the size, giving her younger sister a chuckle as she put it down

"Yeah, super heavy. Come on sis, lets go find Blake and Weiss"

Ruby just nodded to Yang before skipping out from behind the stage where they left the crates, Yang following behind her as they found the two laying some crates down on the stage

"Weeeeiiiss! Blaaaaaaaake! Come on! Lets go get something to eat!"

Ruby hollered causing her team mates to jump down from the stage

"Did you guys finish with all those boxes?"

"Of course, easy peasy!" Ruby smiled to Blake before the whole team walked toward a kiosk. All of them sitting down in team order as they asked for their food, Ruby getting a bowl of Ramen, Weiss getting a salad, Blake getting just Tuna, and Yang also getting a bowl of Ramen, the four girls packed it away in a few minutes before Yang let out a loud burp, rocking the bowls of her team mates

"That's disgusting" Weiss gestured before whipping her mouth with a tissue "So unlady like"

Yang just chuckled before burping again, much louder "Don't be such a sour puss Weiss"

Ruby just giggled before jumping out of her seat "Come on team, lets get home. We've got a biiig fight ahead of us tomorrow!" Ruby gestured for her team to follow before checking to make sure her scroll was in her pocket, only to find it wasn't there

"Gaaaah! Stupid girl pockets…Yang…I think I left my scroll back at those crates…can you come look for it with me?"

Yang nodded before walking over to her sister "Yeah, not a problem sis. You two head back to your dorm; we'll catch up with ya"

Both Blake and Weiss just walked toward the girls before moving past them

"Sure, don't be too late. And don't let Ruby stop and look at all the weapons!" Weiss yelled as they both waved to the sisters, walking into the distance.

"Come on Yang, should be around here somewhere." Ruby quickly sped off to where she assumed her scroll would be, behind the stage. The fairgrounds became darker as the sun set, dusk setting in as people were leaving a few lights left on but it was slowly becoming darker and darker as Ruby and Yang speed walked toward the stage, Ruby getting there first she walked behind it only to see it on top of the same crate she was moving earlier, smiling to herself she walked up to it, grabbing it with a triumphant hum as she turned back to see Yang turn the corner

"Got it! Lets get out of here….this place gives me the creeps at night" Ruby sighed while putting her scroll in her pocket, looking up to see Yang with a slight terrified look on her face as Ruby tilted her head to the side

"Y-Yang? What's wrong" Ruby heard a smash behind her before quickly turning around only to see the create her scroll was on had opened, Falling to the ground as this black Grimm like creature stood on two legs, eyeing the two girls with its blood red eyes, piercing through them as they just stood there, not even sure what it was, a Beowolf or Death Stalker is easy…they didn't even know what it was. It slowly tilted its head to the side, its back sprouting tentacles, six in total as it took another step, by this time Yang realized what she needed to do, extending Ember Celica and grabbing Ruby's hand, the younger girls paralyzed with confusion before Yang pulled her sister away, running as she fired a round back at the Grimm, only for a tentacle to shoot out and to the ground before grabbing the brawlers leg, causing her to fall face first, Ruby falling with her onto the ground before the weird, almost wolf like Grimm walked up to them.

Standing right by their legs it grabbed Yangs arms with two tentacles, tying them behind her back, another gripping Crescent Rose, pulling it away and throwing it across the fairgrounds.

"Yang?! What is this thing?!" Was all Ruby could think to say, still confused by the whole situation.

"I don't know! It's a Grimm! Just run! I'll try and hold it off!" Yang screamed, only thinking about her baby sister at this point, but her arms were already bound, struggling to break free as the Grimm hit a button on the side of Ember Celica, both of the ammo being ejected as two more tentacles moved to the scarlet haired girl, coiling up her legs before stopping at her supple ass, lifting her skirt. The two binding Yang pulled her up the side of the Stage, only to bend her over on a crate, the creature letting out a weird mating call as it slithered its way into Yangs shorts, easily cutting through the underwear as it lightly teased her already wet pussy, causing an involuntary moan from the blonde brawler, the two tentacles currently working on Ruby already had her leggings torn to shreds, though still on.

Ruby had been squirming the whole time, trying to crawl away but unable with another tentacle wrapped tightly around her lower leg, hurting her with its force as she felt a sudden strike of pain shoot up her lower back as the tentacle suddenly entered her virgin pussy without warning, tearing through the fabric of her panties and leggings in one swift motion like it was toilet paper, causing Ruby to cry out in pain, a small amount of blood dripping onto the monsters tentacle as it ripped right though her hymen, the feeling sending pain through her body as she looked over to her sister, only to find her shorts gone, only the elastic from her panties left as two tentacles were in each hole, Yang moaning loudly with every thrust into her as she felt her body shaking with pleasure, her mind zoned out as she was fucked by this Grimm her core dripping as it was rammed into, her swollen clit rubbing against the crate, only adding to the pleasure as she felt her insides being filled, the Grimm not even holding her hands as she dug her nails into the sides of the crate, Her head hanging over the front as she was fucked hard.

Ruby on the other hand was not enjoying it as much, the monster having been more gentle with her then her sister was still pumping into her pussy at a moderate pace, slipping around inside her tight walls as the pain was slowly replaced by pleasure, still in a large amount of pain as she felt herself rapped by this Grimm, this Creature dominating her as two tentacles moved to grab her hands, gripping them so it could start thrusting harder and faster, not caring for her comfort any more as it felt its orgasm approaching, Yangs toes started to curl as she felt her own orgasm arriving, it thrusting a few more times before she let out a long loud cry of pure pleasure, her cum hitting the tentacle as well as the monster it came from, causing it to let out another mating call before it suddenly came deep into both girls. It filling Yangs womb before pulling out of her vagina, shooting all over her stomach and clothes covered breasts, the other once cumming deep into her asshole, pulling out as cum leaked from it, the one in Ruby pulled out just before climax; cumming all over Rubys face and clothes covered chest as well as the floor around her, Both girls just laid there as the monster panted, Ruby clutching her stomach as a small amount of blood dripped from her and Yang bent over on the crate as cum leaked from both holes, her body limp as she panted, tongue out like a dog, her mind blank.

The Grimm let out one more sound before turning around and running and jumping over a nearby fence as the tentacles retracted into its back, looking more like spikes at this point then the tentacles that they just were.

"Y-Yang….C-Can…you….hear me?" Ruby asked in a whisper as she crawled toward her sister "We need to….Need…."

Then everything went dark as Ruby passed out.

How was that? I hope you enjoyed. More to cum of course XD If you think I could improve with anything please let me know, if you have anyone or anything you want to see, please let me know. Thanks for reading!