Disclaimer: First Chapter
Story Start!

'Okay Rias, don't get nervous...' Rias thought to herself as she sat in the middle of a dark park in the middle of the night. She was going to meet Naruto alone, since their outing had turned into something that didn't lead to much getting done, she finally wanted to talk with Naruto privately. So while she sent, made sure BOTH, Akeno and Koneko were on night long jobs, she would talk with Naruto and... ask a certain favor of him.

His code on how a King should act made her think about her own plans for how she would go about Rating Games.

She was easily the strongest person in her group, yet she had been afraid of being taken out in Rating Games and losing the match. Her future plans, had indeed, involved her placing her pieces on the board strategically while keeping herself in reserve for dangerous situations, or taking opponents on one on one only, if she even fought at all. She had thought on her plans, and came to realize that instead of simply relying on her pieces, she would join them in the middle of the battle.

If she lost, then she lost, but she would take pride in joining in the battle, and supporting her pieces like they supported her... they were her family, and even though her family was also a group of servants... she didn't want to think she was using them as a means to an end. She did love them all, and she wanted to show them the support they deserved of her.

"Fuck OFF Kurama!"

'Yeah, I wonder if he is even going to show up at all.' Rias thought, in her own little world, completely unaware of Naruto fighting a large monster behind her, while Kurama watched on with a stretched grin. She didn't see the giant lamia-like creature, a Rogue Devil, that Kurama had captured for the purpose of using her for Naruto's training.

Kurama captured it, ate it, stored it in his stomach, and then when the Rogue Devil mutated in his stomach, he released it from his belly and allowed it to attack Naruto so that he could grow stronger.

It was a large female, with the lower body of a snake, and where her vagina would be, she had a 5 foot long sideways mouth... with teeth. The inside of the mouth was pink and squishy, and her long snake tail was darker pink in color, with brown spots. The woman's woman half was naked, of course because why not, and she was endowed with huge breasts... and she had 6 arms on each side of her torso, going down her ribs. Her flesh had peach colored scales, the color of human skin, and her hair went down her back, black in color.

"I'm going to enjoy eating you!"

"Nope!" Naruto shouted when her Vagina-Mouth opened up wider and she rushed towards him, intending to swallow him whole with her pussy. Naruto landed on feet after jumping away, and noticed Rias sitting on the bench, thinking to herself. "Hey Rias! A little help would be AWESOME right now!" Naruto shouted towards her, and she either ignored him, or was so in her own little world that she didn't hear him.

Rias just smiled, not that Naruto saw her smile since she was facing away from him.

Naruto was smacked by the business end of... the Lamia-like creature's tail, and sent flying into a tree the second he didn't pay attention to her. Naruto slid down the tree onto his feet, and he glared.

"Will you taste sweet, sour, or maybe spicy? I can't wait to savor the pleasure you give my lower body."

"... Gross, I'm not going to die via vagina... maybe." Naruto stated when he realized that Koneko was... well she was wearing him thin with how needy she was being. "I'm not dying by your vagina." Naruto corrected as he started to run towards the creature, and he pulled back his fist. When he threw a punch, he was met with unexpected results.

*Squish*

"Going to have to do better than that Naruto. This one has been mutated in my stomach for several days." Kurama stated when Koko's, the name of the Rogue Devil, lower mouth caught Naruto's fist and swallowed half of his arm. Naruto's biscept was caught between two large, sharp teeth, and he was lucky to still have his arm period.

"You taste delicious."

"... Eeeeew... It's cold and moist, and hot all at the same time... OH SH-" Naruto shouted out, before like spaghetti, he was sucked into the mouth and swallowed whole. Naruto used his hands and grabbed onto the teeth.

Kurama laughed.

This brought back so many memories for him.

'He's really late, I hope that he didn't just decide not to show up... and just when we were starting to really become friends.' Rias thought to herself, and Koko's vagina opened up and showed Naruto trying to pry the lips apart.

"Can I get a hand... OH FU-!"

He was swallowed again, while Rias remained blissfully unaware of what was happening not even 45 feet away from her.

"Stay inside me... Ooooh, you feel so good being melted by my juices."

Naruto opened the lips again, his clothes already dissolving a little from her apparently acidic vaginal juices. His skin was steaming, his durability and apparent resistance to the acid helping him from becoming her, well it wasn't lunch, but some weird kind of sex toy. Naruto yelped when her lips shut closed in front of him, trapping him inside of her internal walls once more.

"How will you get yourself out of this mess Naruto?" Kurama asked Naruto with a grin on his black lips as he looked at the slight bulge in Koko's stomach. All 12 of her arms rubbing the bulge to try and make it go further down her tail, and deeper inside of her. "I believe I made her a good enough challenge for you at this stage in your development... and best of all, you will learn to hate snakes all over again... a win/win for everyone." Kurama grabbed about his own genius at developing this training method.

Rogue Devils were so easy to capture, and since they weren't humans, they had a higher chance of surviving inside of his stomach. Not to mention they mutated so much easier than humans that just by being in his stomach, they became stronger and mutated with their unstable bodies to adapt a little to his power... since he was allowing them to mutate and not just die from touching his chakra.

"Did he forget?" Rias asked herself out loud as she looked up at the moon.

Such a pretty moon.

Koko's tail region rumbled for a moment, before her lower mouth opened wide and juices spewed out, with Naruto in them, his Holy Knuckles on his fists. His clothes were completely digested, which had given him the chance to get to his Holy Knuckles in his pockets. She was still a devil, so having such strong holy objects inside of her body no doubt had caused a very negative reaction with her body.

"... Forgot I had these for a second... Hope you liked that bitch!" Naruto shouted at Koko.

Koko moaned, and the second she did, Naruto paled. She rubbed her body in multiple places in response to the pain.

"Mmmmm, it hurts so good..."

"... Nope. Fucking nope." Naruto stated as he turned tail and started to run the other direction. She gave chase after Naruto as he ran towards Rias, and as he passed by her, he slapped the back of her head. "RUN!"

That was his statement to her.

"Wait... What? Naruto, why are you naked and moist? Huh? Run, from..." Rias started when she was slapped, holding the back of her head. She questioned everything about the situation that had just quickly happened. She saw Naruto's naked, muscular ass running in the distance as he got away from something. As Rias was questioning what she should run from, Koko moved passed her, ignoring her.

"Get inside my vagina and let me use your small, sturdy body as a toy until you dissolve!"

"... That answers that... What the hell?" Rias asked as her wings came out of her back and she took to the air. She wasn't fast enough to catch up on foot, so she flew towards Naruto, flying passed the rogue devil in the process. "Naruto, I thought you stood me up... What is going on?" Rias asked Naruto as she flew next to him.

"The ASSHOLE..." Naruto shouted back at Kurama as he jumped and backflipped over Koko as she caught up to him, before he put his arms around her neck. "... decided that I needed to train tonight, and brought this SEXUAL DEVIANT as an opponent!" Naruto let out an almost girlish scream when the tail wrapped around him. "NOT AGAIN!"

He was shoved back where he had came from earlier.

Rias focused her Power of Destruction, forming flame-like black energy in her hands. She might not be to her brother's level just yet, but the explosive power granted to her by this type of magic should easily allow her to kill this rogue devil without hurting Naruto. His durability should allow him to withstand a blast of this level with only minor injuries.

"More food!"

When Rias threw her power of Destruction, Koko opened up her lower mouth even further and swallowed up the magic.

"Oh, Red Devil Girl, that Rogue Devil has the power to devour magical attacks..." Kurama spoke as he appeared on a nearby tree branch, commenting on why her attack failed.

"FUCK!"

"You also hit Naruto in the face with that attack." Kurama noted, since by opening up her perverse lower mouth, she had let part of the attack hit Naruto's face.

"Sorry Naruto!" Rias called out to Naruto.

The tip of the tail wrapped around her leg, and she yelped when she was pulled out of the air, without her magic available to her as a weapon, she was pretty much defenseless. Koko pulled Rias in, and shoved her into her monster parts. Rias was shoved feet first inside, and Rias was grossed out instantly when she realized what it felt like to be inside of a monster... lady bit. A monsterous, monster, ladybit.

She could see in the dark, so she was able to see Naruto, face to face with her, giving her an unamused look. She could see that his had burn marks on his face from where she had hit him, and she smiled apologetically.

"... So... what did you want to talk about when you asked to meet me?" Naruto asked her as he wormed so that his lower body was slightly facing away from her. Naruto found that harder to do than he thought it would be, because her body just might their small space even smaller. Their bodies pressed together as harshly as possible, they were face to face, nose to nose at the moment. "... Why does everything supernatural either want to molest me, rape me, or kill me?" Naruto asked Rias, because if anyone had the answer, she did.

Rias deadpanned.

Yeah, she had kind of wondered that as well. With all of the perverse creatures that had abilities to negate magic, or tentacle creatures that could stop super abilities, or slimes that could molest people and melt clothes, she wondered why they were even allowed to exist. They were creatures whose sole purpose was to molest and rape, so why did anyone bother allowing those species to survive?

"This is the world you were thrown into... Speaking of which, this kind of enforces why I wanted to talk with you. I was wondering if you would teach me some martial arts... since you are really good at them, in the situation my magic doesn't work." Rias spoke up what she wanted to talk with him about. She wasn't bothered by her clothes being melted, for one they were just clothes and she could buy more, and two it wasn't like she was ever really bothered by being naked either. "I would ask the others... but knowing them, but only Koneko knows martial arts... she I can't really afford to take her punches." Rias mentioned with a wince.

Rook punches would hurt her a little too much for her liking, not to mention she wanted to become better friends with Naruto.

This seemed like a good idea.

"Yeah sure, it would be nice to have a magic user to fight... train with to get used to people who use magic. Anyway, we kind of have to live through this first... Can you move any?" Naruto asked her as he squirmed around.

"Ah!"

"... Sorry." Naruto stated with a blush on his cheeks, Rias' clothes had been fully melted by this point, and unlike him who had a bit of a healing ability, Rias' body was starting to tingle as she felt her body disolve. Rias smiled at him with slightly red cheeks, his leg had rubbed up against her mound, and his chest had been rubbing her nipples.

He couldn't help the fact parts of his body were rubbing up against her.

"... Natural reaction?" Rias asked when she felt something pushing against her stomach, and she looked away from Naruto's eyes.

She didn't blame him.

"Who do you think is at fault for that?!" Naruto shouted at her, and she blinked, before her smile turned more awkward.

Oh, right.

"You should just drink her blood, we are in the perfect spot for it. Then you can suck her magic and stamina out of her... weaken her enough for us to escape and finish her off." Rias gave an option for them to use. She knew that Naruto could temporarily go Vampire by drinking blood, or at the very least make use of his vampire heritage. "... Can you bite her?" Rias asked, and Naruto looked at the flesh walls surrounding them.

"... You want me to bite, and drink blood from acid spewing walls?" Naruto asked her, and she frowned.

Right, not smart.

"... Ouch!" Rias hissed in pain when she felt her hip burn for a second when Naruto's fist brushed up against her. His fists bearing his Holy Knuckles, and with her being a devil, it was super effective.

Naruto blinked.

An idea started to form in his head, a bastard of an idea, but an idea that might just work.

"... I need you to push me down, as far as you can go." Naruto told her, and she raised an eyebrow.

Okay, seemed like he had an idea.

"Okay." Rias stated as she used her hands at his waist and started to move his body down her own body. She winced when every once and awhile his fist would brush her, burning her. She wasn't bothered when she managed to push his face between her breasts, surrounding his head... actually kind of suffocating him considering how hard it actually was to breath. What got to her was the fact that his man-meat was between her thighs now.

"Keep pushing me down, my foot is touching something flat and round."

"... Okay, but don't tell Koneko about this." Rias told him, and she knew he agreed.

"Yeah, I'm going to tell her that I spent the night inside of a monster's vagina, butt naked and pressed against her boss... sounds like a great idea to me... NOW HURRY! Your boobs are making it harder to breath!" Naruto shouted at her as she pushed him further down, and when she got his face to her stomach, she was able to push down on his shoulders. She moaned a little when his nose touched sensative areas on her body.

She didn't know how far he needed to go down, but she could no longer use her hands to push down on him, because he was literally face to face with her lady parts, and her hands went no further.

"Okay, I pushed as far as I could, what is your plan?" Rias asked.

"I'm really sorry Rias."

"Sorry for what?" Rias asked, before she felt sharp fangs pierce her thigh. She moaned loudly, because the thigh was still very much one of her hot spots. Not as much as her neck was a hot spot, but it felt good to hand her thigh touched, or even bitten as lightly as Naruto was doing. She couldn't see his face, her boobs were in the way, but she could tell that he was sucking her blood out through her leg.

Why though?

She blinked when Naruto's body started to... vanish from underneath her. She couldn't even feel him anymore as the walls tightened around her. The tail around her squirmed even more, and her body became to feel the burn. She winced in pain, wondering if Naruto abandoned her by using his Vampire powers to turn himself into darkness. She heard the muffled sounds of bats coming from underneath her.

"What?" Rias questioned when the walls around her started to loosen, and then expand more and more.

What was going-

*SPLAT*

The tail around them exploded, Koko screaming in pain, not pleasure, as literally the majority of her tail was destroyed. Rias was tossed away, landing on her butt on the ground, while thousands of bats started to fly around the area, coming out of the remains of the tail. Those bats started to gather together, before they reformed into Naruto, on all fours and gasping as if he was in pain.

"... Take that... Uuuuugh." Naruto groaned as he covered his mouth, trying not to throw up from what he had to do to escape.

Koko's movements started to slow down, since the majority of her organs were in her now destroyed tail. She quickly died, her movements going still, as Rias got up and shook her body off to get rid of anything... but that didn't matter, because she was going to be taking 20 baths and showers after this for sure.

"... You turned into darkness, went inside of her womb, before turning into thousands of bats... causing her womb to expand to the breaking point... and then she broke. That was an amazing plan Naruto." Rias spoke as she walked towards Naruto, not even hiding her shame as she used one hand to hold up her breasts, keeping gravity from causing her back pain in replacement for her bra. Her other hand simply touched her hip as she smiled down at Naruto, and even then she used that hand to offer him a hand in standing. "That was brilliant... That's okay, get it all out." Rias spoke when Naruto started to throw up.

All of her blood that he had sucked poured out of his mouth, and onto the ground, while she looked away from him.

Then he finished, he wiped his lips.

"... Happy birthday..." Naruto gave a weak one liner.

She laughed, genuinely laughed when she realized that they had literally just been through a bastardized version of what it was like to be born... only more explosive and deadly. She covered her mouth with her hand and tried to hold some of her chuckles back, but she utterly failed at it.

"Guess we are... hahah... twins huh?" Rias asked him, going with the joke. "Call me Onee-chan." Rias snorted when she said that, and Naruto tried to laugh with her.

They sent silent after a moment.

"Good job Naruto, next time I'll pick an even harder opponent for you. I'll see you when I find somebody to use to train you." Kurama chimed in, having watched the entire time as Naruto used his wits to once more escape from the inside of a snake. Kurama jumped off into the distance faster than anyone could stop.

Naruto cursed.

"... Looks like you've got yourself a troublesome teacher... Come on, lets get back to the club room and get washed up... we smell horrible." Rias stated when she gestured to their slime and blood covered bodies.

Naruto watched as she extended her hand to him, and smiled down at him.

He smiled back, taking her hand.

"Thanks Rias..." Naruto stated, not looking anyone but her eyes, because he was forcing himself to stay as soft as possible to try and avoid her seeing something... well she had already seen that, hadn't she? Naruto used one of his hands to cover his crotch as he accepted her hand in his other hand. "... It's going to be a long walk back." Naruto pointed out, and Rias nodded her head.

She hoped nobody was in the clubroom when they got there.

This would be hard to explain.

Chapter End!
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