A/N: Hello there, welcome and thank you for reading now that greeting are out the way, this fic is not a standard DxD/Naruto fic where Naruto become a devil or Lord Naruto the OP that get a harem of every girl in the two universes. This is a Naruto X Rias relationship with no negotiation so please no asking for a tri pairing or a harem.

Also this is going to be a small fic, probably only going to be four to five chapters.

All that being said please enjoy.

Talking normal-"Hello"

Thinking-'hello'

Demon/Greater entity-"hello, Bow before me and bring me booze"

What Is The Cost: Chapter 1: There Goes The Bride

Rias was a mess.

Well not physically but emotionally, her life was about to turn for the worst.

You see she wasn't what you call normal... in the biological sense she in fact, a devil.

Yes the Christian devil of 'hell' well not really the underworld wasn't fire and brimstone with only eternal torture awaits, satan knows how she and most of her race hates that stereotype.

But, that not the problem you see a few thousand years ago there was a war, a war against the Christian god and his angel's as well as the fallen, angels that became 'corrupt' in gods eyes and was thrown out of heaven.

This war from what she learnt from history the three factions gained many losses, the Devils lost a good chunk of their numbers as well as their four leaders the original four satans, the heavenly angels lost a good number of their people as well as god themselves becoming injured and from what people believe still injured to this day. And finally the fallen angels like both factions lost a lot of their people but their leaders were for the most part ok if a bit shook from the war.

This war helped shape the world the three factions live in, but the faction it affected most was her faction, the Devils, how do you ask.

By putting the pieces there for a civil war, one that would changed devil kind.

The death of the four original satan left the leadership open with the original's family filling the positions this was ok at first, when The Devils were recovering they were focused on that alone. But like earlier said a civil war happened so that didn't last long, unlike the other faction the Devils were recovering well, losses were not as bad as the other faction and the number of newborn Devils was rising which was surprising considering that their race was slow breeders. The thing that started the war though was the four satans, unlike the original who for the most part a group that keep the Devils together and in line the new satans were anything but, they were greedy even Devils standard, they were sadistic going as far to harm their own people, even sometimes family member for only amusement, as well as letting their lust... drive them to such depraved acts that most Devils sickened.

This and another factor helped start the flames of a rebellion and later civil war but it was the other factor that started the war, the spark if you will.

Their warmongering.

You see after the war the three faction came to agreement which dumb down to 'keep off our land and we won't kill you, also fuck you' well not those exact words and with a few exception of course. This a one could imagine left the relation with the groups were cold at best which in turn divide the politics of the Devils, those who wanted to start another war against the two other factions.

And those who wanted peace.

The two groups where...Civil at first, pun not intended they would talk and debate with a surprising number joining the side of peace but things turned for a worse when the satans replacement made their opinions know I.E. call them a traitor if they didn't have the same and kill them.

This as you can imagine cause a lot of anger the Satans that where unpopular at this point thanks to a more modern mindset starting to this point, and point was the breaking point.

The war started, and it wasn't like some would like against any Angel, but their own.

This war was quick and quick and bloodless compared to the three faction war but to the Devils this war made all the efforts of rebuilding destroyed. The population was lower than the end of the three factions war and all they had to show for it was a change in leadership, needed yes but a lot of lives lost.

This caused a bit of a panic that their kind wouldn't be able to recover, that was until a miracle happened.

The Evil Pieces

Created by Ajuka Beelzebub one of the new four satans along her brother and comrades created these object that could turn other species into Devils, in doing helping save their kind from a slow death or invasion.

But like all things good and bad it came at a cost.

The pieces worked for most part perfectly doing what they were made to do, but something came from this invention.

Culture shock

The idea that in theory any being could become a devil gave rise to an ideal of superiority. Newly reincarnated Devils the people that became Devils through the pieces became servants as part of peerage and second class citizens, and a fair amount of those people didn't become Devils willingly.

This also brought up another ideal thanks the newly reincarnated Devils, blood lines.

The original Devils had originally descended from the 72 pillars noble families of devil kind, these families still survived and are the elites and nobles but in very diminished numbers because out of those 72 families only 33 are alive, some with only one or member in them. And a few of those families have special gifts like her family that hold the power of destruction, which grants the user the ability destroy anything if given the user is well trained in the art and powerful enough to use it.

This started a movement and Rias problem in turn, arranged marriages.

Rias's problem was being 'Promised' by her father to the one of the sons of the Phenex clan, a clan know for their powerful regenerative abilities. The son she was promised to was Riser Phenex, a man that disgusted her to no end. Riser was a womanizer and a unredeemable pervert only seeing her as a toy to 'play' with and that not including her peerage, her friends who he saw as the male part as people to trade of power and the women as playthings.

She was so angry, she was promised that she'd have till after she finished college when she could challenge Riser to a rating game, the Devil equivalent of a dual with a full Peerage to help but no, instead the promise was broken as she was forced to challenge Riser before she was ready.

And he was.

Her prestige wasn't ready, not ever fighting in a rating game before only ever sparing with each other and not having a prestige of seven instead of the full sixteen, Satan two of those members have only been Devils for a few weeks and another member couldn't fight because they can't control their power.

Against Riser's full and experienced peerage they had no chance.

And this leads up to now, Rias in a wedding dress with the wedding held in a few hours looking in the mirror looking at herself in wedding dress wishing she wasn't, all she wanted to do was cry and lash out.

She turned when she heard the door open to see who entered.

Her mother Venelana Gremory.

Her mother looked a lot like her if looking slightly older, her body could be described as sinfully perfect with wide hips and large breast with a flat stomach wearing a long elegant dress which showed a fair amount of cleveage. One could mistake her for Rias sister the only difference between the two was that Rias had red hair and blue-green eyes while Venelana was a brunette with purple eyes.

"What do you want?" Rias said in an aggressive and aggravated tone, not wanting any company at the moment. Venelana could only smile sadly, she was against the wedding from the start but her husband and Rias father Zeoticus pushed for it.

"I wanted to see my little Rias before the big event." Venelana was trying to not upset anymore than she already was so she pick her words carefully.

"don't you mean the beginning of my own personal nightmare!"

Apparently not carefully enough.

"Rias I know your upset but-"

"Upset! UPSET?! I am more than upset I'm heartbroken! I feel betrayed and most of all I'm livid!" Rias shouted as she quickly stud up and walked towards her mother.

But Venelana was not one to be shouted at "Rias! Don't take that tone with me! Just because you upset does not mean you can lash out!"

"I have every right to lash out, I'm about to married AGAINST my will to a- a MONSTER!" Venelana couldn't help but flinch hearing what Rias thought were on her 'fiance', that being said she put on a strong face and spoke.

"I know Rias but father promised-" she was interrupted once more.

"Something he didn't have a right to and what did you do? Just stand there and do nothing, my life is about to be ruined because of some damn PROMISE! For satans sake the man looks at me and my friends as things and FUCK TOYS!"

"RIAS!" Venelana shouted not wanting to hear anymore, it was bad enough this wedding was happening as it is.

She just wished to not hear what that man would do to her daughter. She already had enough lost nights sleep thanks to it.

A silence went through the room as the two stared at each other one with sadness the other with anger.

That was until Rias broke it.

"I hate you..."

Venelana's eyes widened in shock "R-rias-"

"you and dad are hypocrites" Rias interrupted once more, her voice calm but cold. "You both fell in love with each other and you said fought in the civil war with Sirzechs-nee so your children could be free to choose their future." She paused and breathed in "But you take my future and give it away and for what? For a chance of a child to be forced upon me that would be called pure, you are going to allow me to be raped by a monster over and over for some stupid idea of a 'noble cause' you. Are . A. Hypocrite."

Venelana was silent throughout the small speech that Rias gave with shock and horror running through her with a growing sense of self lofting.

"Just leave." Rias said with no emotion, but as Venelana looked in her eyes see could only see fear and sadness.

Venelana just nodded, if reluctantly and turned to the door and was about to leave a whisper left her "I'm sorry." With that she left the room walking down the corridor she could only think of one thing.

'I'm going to fix this' No longer in Venelana's mind was this wedding going to happen she was going to end it, no matter the cost.

Too bad it was too late for her to fix this.

Rias location

Rias was once more looking in the mirror thinking of the 'conversation' she just felt guilty for what she said.

But also not.

She groaned as she lowered her head as her thoughts were cluttered with just about everything her friends, family, future and everything else you could imagine with a that said she decided to do something that seemed offensive to most Devils.

She prayed

Not the Judaic god but to just about anything listening although it hurt her.

Funny if one was to think about it any force besides Devils could pray to God without repercussion without harm, even murderers, but Devil that are a innocent as a nun would be harmed.

She would of laughed if she felt like she could, but that didn't discourage her and so she prayed.

"Please whoever is listening, Please help me I-I don't know what I want to do. I'm scared for me and my friends future please help me, I'll do anything."

Silence, she didn't know what she was expecting she was a Dev-

"So, young one you want some help, well I think it's only right to help those who need it."

Rias turned to see where that voice came from to see someone she never seen before.

Or in this case something.

The being reminded her of the humans interpretation of a ghost with a human body upward the waist where the lower half was a white shaped mist, But unlike the human idea of a ghost the lower half wasn't a mist but a blue flame. It didn't help that the that the more 'human' top half looked a bit different from the more standard human.

The Beings facial features were most definitively male and human-like, also looking fairly old with their wrinkled face. But some of the features are wrong the skin was to pale almost being a pale milky color than an normal skin tone, one of the other things that didn't seem to belong was the fact that the man had horns. Not horn like a goat or any animal but ones made from his flesh.

But the main thing was two things or in this case three.

His eyes, there were three.

The eyes wasn't also what you'd calls normal, the pair of eyes that one would call normal was different with the them being purple with ringed ripples with no whites in the eyes, just the color and shapes. The third eye was different but the similar with the eye being a solid read with ripples instead of a solid purple with ripples.

As Rias stared at the oddity in front the being started to speak.

"I know I am not what you would call normal, but could you stop staring please it is difficult to have a convercation when your being stared at like a zoo animal."

Rias shook her head and stopped staring as her eyes narrowed at the man in front of her "Who, or better yet what are you?"

The being Smiled "Well you can call me a spirit, a powerful one that which wants to help you but as of who I am, well is it rude to not introduce one's self first before asking for one's name? But then again it is rude to enter a ladies room uninvited so I can't talk much, very well my name is Otsutsuki Hagoromo.

Rias slowly nodded spirits were rare and hard to find but still around if you knew where to look."My name is Rias Gremory a...pleasure?" she was uncertain if that was right response since it not everyday a ghost come to say hello, but one this had catched her attention.

"You said you are going to help me?"

Hagoromo just nodded "Yes I said I would didn't I, that being said this does come at a cost."

Should have expected that "ok, before I agree to anything how are you going to help me and why should I trust you? It's not everyday a person helps a stranger."

"Ah such a sensible young girl thinking before acting, quite rare now a days. The old spirit said nodding. "Let's start with why you should trust me, first is that although you desperate I won't force your hand if you don't want my help I'll just leave, Second is I'll protect your friend from the consequences of the Decision if you do decide to accept my offer."

She nodded in thought, Although he didn't have her full trust she was more open to the idea. For one like he said she IS desperate and giving her a choice maybe moot but reassuring all the same. Also the fact he was will not only to help her but her friends was a good selling point if one was to look at it from such an angle, given the fact she wouldn't let her friends come to harm for her to be free.

"What about the deal? What am I meant to do and how your going to help me? You haven't told me."

"Yes I was about to get to that but you looked like you were hard in thought." Her eyebrow twitched, cheeky old ghost "Right, what would I do for you is take you away from this world."

Rias gave a flat look "If you think hiding in the human world is gonna work I'll just tell you now it won't they have spells to track pure bloods like me."

Hagoromo gave a flat look back "True, but that is only for the human world I never said I would send you there."

Her eyes were no longer give a flat look but one of Surprise "B-but the only other worlds are heaven and the other pantheons worlds and they don't allow Devils into them."

The ghost closed his eyes and nodded "also true, but again I never said those o'd hide you in those worlds. I would take you to a place where no Devil knows about or any Pantheon for that matter, well except one but they don't have any power there beside two who can only do some much there."

Rias was in shock from what she just heard but got worried when he told her that a pantheon knew about the world, worried that they might reveal where she would be or worse kill her. "W-which pantheon?"

"The Shinto, but the only two god that have power there are the Shinigami and the exiled minor god Jashin."

She could help but question "Who the satan is Jashin?"

"So unimportant and forgotten in these worlds that he a non factor but in the world you would be going to, the god of blood and murder."

Rias couldn't help but shiver, a god of murder and an exiled one didn't scream friendly "would they reveal who I am? Or worse?"

Hagoromo shook his head "they won't care, never have the Shinigami cares only for the soul he ferries and rarely listens to the rest of the Shinto gods, let alone cares and Jashin would most likely keep you alive and a secret just to spite the rest of the pantheon if they cared."

Rias sighed in relief at least she would be safe. "Okay the offer sounds tempting but you haven't told me what YOU want."

The spirit looked Rias in the eyes which held many emotions hope, fear and sadness "what I want is one thing but three thing are required, the thing I want and need is for you is to help a boy he will be your age when you go to that world, I fear he may lose his way without someone's help."

"The second thing and what is require is that you are...De-aged for a lack of better terms, not to the age of a child though just two years to the age of fifteen and the final requirement..."

Rias was silent throughout the conversation, the first two thing she'd be okay with, a bit curious about the boy but gained a slight worry at the pause. "The final requirement.."

"Is that you become human."

Her eyes widened in shock "Become human!"

Hagoromo nodded "Yes, the world I would take you to would be unsafe if you stayed a Devil, you would be killed or worse if were discovered to not be human. The humans of that world are far stronger than the ones you know, stronger than most if not all of the species that you know barring god's, but then again there are a few cases that challenge that too."

Rias was close to hyperventilating after hearing that, was this how her servants felt when they were asked to become Devils.

"You will keep a fair amount of your abilities so your not powerless but thing like teleportation and traditional spellcraft will be lost to you that said you will be more powerful and you will be able to gain access to abilities that make your magic look like weak."

She couldn't help but wonder "Would I lost my powers of destruction?" It was something special to her, that power even after everything she said to her mother she didn't want to lose one of the thing that connected them.

"No you won't, it will be changed but still there. So Rias what is your choose?"

A deafening silence made its way through the room as Rias was left to her thoughts until rias began to speak once more.

"My friends will be safe and I'll be safe also?"

Hagoromo nodded as silence made it way back for a few minutes till Rias spoke again.

"I'll do it."

The old ghost smiled "thank you Rias, for what it's worth I am sorry you had to make that kind of choose."

The soon to be free girl smiled if abit sadly then something popped into her mind "Is it alright if I say goodbye to my Peerage. Since by what you said they won't be coming with me?"

Hagoromo smile turned sad "I am sorry Rias you cannot. It would be too much of a risk that being said I would recommend writing a letter for your goodbyes."

Rias nodded and went to grab a piece of paper and a pen as she got them a thought ran through her head.

'Should I apologize to mother?' While she just had a brutal argument with her mother she still cared for her no matter who much she said she hated her.

She now had an idea what to write, as she sat at the dresser table where she was looking in the mirror earlier.

As she finished Writing the letter she folded the paper and put it on the table she turned to look at the Ghost. "So what now?"

"Now, it is time to go." Hagoromo made waving motion with hand as a Gray-black portal started to open.

Rias stared at the portal "so this is it..."

"Yes I would recommend not taking too long I feel that someone maybe coming."

Rias nodded and started to walk to the portal with a steady pace but stopped before entering. She turned her head looking back at the room.

"I guess this is goodbye then..."

She walked.

As she entered the portal started to close leaving Hagoromo to himself where he spoke to himself.

"No, young one this is a...See you later."

With that he faded like he was never there. The room was empty, silent.

*Knock* Knock*

"Mistress Gremory, You presents has been requested." From outside the room a Feminine voice came which was meet by silence.

"Mistress Gremory?" The woman entered the room to reveal one of the servants of the Gremory clan.

The servant looked around the empty room noticing the folded letter on the dresser, she went over and grabbed it.

She unfolded the letter she gasped and ran out the with letter in hand.

Venelana's location

Venelana was looking for her husband who was currently greeting their guests for the 'wedding'. As she weaved through her guest she found her husband talking to lord and lady Phenex.

'Good' She could make this easier.

As she walked up to them she spoke "Lady and lord Phenex, husband."

The three turned to see her, Zeoticus smiled and started to speak. "Ah Venelana my dear how my little girl doing? Is she ready for the big event?"

Zeoticus was a handsome man with green-blue eyes, long red hair, a trimmed and stylish beard and His build was thin but muscular. The man was a head Turner for most women with personality to match, that said many who knew him would say one thing about him that stuck out like a sore thumb.

He was very prideful.

His pride was said to be one of the most defining features about him. That being said there is a reason this personality trait stuck out is that to those who knew him long enough helped give a understanding of other traits he had.

His Stubbornness for one.

Venelana shook her head she didn't need to think about this she need to fix this problem.

"That is what I want to talk to you about."

Zeoticus raised an eyebrow as his smile turned into a frown. "Is something the matter Venelana? Lord phenex is it alright if you and your wife give us some privacy for a moment."

The lord of the Phenex clan nodded and was about to leave until Venelana stopped them.

"That won't be necessary, in fact it they are going to listen what I'm about to say."

"Venelana?" Said with some uncertainty, she seemed to different from how she usually does.

"The wedding is not happening. The engagement is off." That made the group reel in shock.

"What! No it isn't! What has gotten into you Venelana!" Zeoticus shouted fairly loudly bring attention to the argument.

"Some sanity, don't you see our daughter is in pain! She hate the man we are trying marry her to, for satans sake! She said she HATED US!" Venelana shouted back bringing more attention to them.

"She was most likely just exaggerating, she-"

"She was not exaggerating!" Venelana interrupted "you weren't there, her voice, her eyes! All those emotions aimed at me! All because you decided to do something we had no right doing!"

As the Argument got worse a man came through the crowd.

The supposed man of the hour Riser Phenex. The man was wearing a white suit which hugged his body, showing off the few muscles he had. The man's facial could be described as handsome if it didn't emit an aura of 'I'm better than you' that made you want to punch it.

Oh and the very angry look on his face.

He walked to Venelana with purpose as she noticed him coming towards her.

And when he arrived he made that purpose know.

"What is this I hear, something that by right belongs to me being taken away. I was promised"

Venelana narrowed her eyes "what right do YOU have. You, your father and my husband BROKE your promise to MY daughter so I would have thought that you would mind another breaking promise."

As Risers face became angrier he was about to say something till a the loud sound of someone slamming the door open, revealing a maid who looked out of breath.

"oh for love of the Maou, what is that maid doing." said an aggravated Zeoticus.

"L-lord and lady Gremory there's an emergency!" Said the made in worry

"What emergency?" Riser said coldly

"Mistress Gremory I-is m-missing!"

The room was stunned silent till Venelana said the one thing on everyone mind "W-what?"

"She's missing my lady, the only thing I found in her room was a letter!" the maid said as she gave Venelana the letter.

As Venelana Grabbed the letter she was full of worry and as she read the letter that worry felt justified "No.."

To anyone who is reading this. This is a goodbye I don't know when anyone will find this, may it be minutes from now or hour but at either case it does not matter I'll be long gone. To my peerage, my friends I'm sorry I couldn't say goodbye it hurt me just as much not being able too, but for all it's worth at least I know you will be safe, as promised by the person who has helped me.

And to my mother I'm sorry for what I said earlier but I am not marrying that man. I still love you but I will be free no matter how high the cost is.

Please don't look for me you won't find me

Rias Gremory

She dropped the letter letting out tears and dropped to her knees like the letter as her husband grabbed the letter and read. And when he finished his eye were wide with many emotion, the most preferent.

Panic

"Well don't just stand there, FIND HER!"

Too bad he would not find her

End Chapter

A/N: Dear lord did that take longer to write that originally planned.

That said I'm happy with how this one has turned out. I'm not going to update this fic straight way after this comes out, I'll be working on my other two fic's that said this will be a on high my to do list.

With that said Thanks for reading and have a pleasant day.