Buenas noches a todos los que lean esto!. I know, you can't understand that sentence but don't worry, I haven't said anything important.

Now, this is a new story that I've started to write yesterday. This was a challenge from Naruto Gremory Lucifer Phenex who gave me the main idea, and helped me with this. I'll post a few links on my profile along these days, so stay attentive.

Disclaimer: I don't know neither Naruto nor Highschool dxd, most of the ideas for the prologue are mine but "Naruto Gremory Lucifer Phenex" owns the main one.

Pairings: Naruto Harem, Issei Harem. This story will start with powerful Naruto, but eventually Issei will have incredible abilities and a Harem too.

Warning: This story will contain explicit lemons starting in a few chapters. I don't know when, but this will have it.

Last thing to mention: This prologue is really rushed and, surely, has many spelling and grammar mistakes. So, if any wants to be my beta reader please send me a PM. I won't accept anyone who came, but I really need the help in my writing.

"Naruto, it's a beautiful name"

~Kushina Bael~

Prologue

Lilith, the current Capital of the Satan territory was one of the most active citys in the Underworld. Like the human world, it resembled a normal place; filled with houses, parks, inhabitants and —unlike Earth— a purple sky with black clouds. However, despite what most would think about the weird skies, the rarest thing was that the population consisted on Devils.

Most of them used their strength for bad purposes, such as raping innocent humans, killing them or even to fight against other demons. That happened more often in the past, many were hungry for more power and, eventually, that led to a civil war between two factions of devils: the Old Satan Faction and the Anti-Satan faction.

They had different thoughts of government after the Great War ended, and while the first faction wanted to continue the war the second one just desired peace. Due to that, a civil war forced its way to rise between the weakened devils.

This conflict lasted for almost a decade until five demons from different families all stood together and defeated the Old Faction. One of them, was the older brother of the current leader of the Phenex Clan: Minato Phenex.

His power was unbelievable —he had almost the same level than Sirzechs Gremory— and, thanks to him and the other leaders of the Anti-Satan faction, they managed to defeat their opponents without much trouble. Peace was finally set after years of war, and the Underworld flowed with life again.

However, it didn't last more than a few months.

Minato Phenex was considered one of the most powerful devils in the whole Underworld. Yet, despite his great power, he didn't used them for evil purposes; instead, he preferred to be a calmer guy. Strong and peaceful, such ideal of devil was envied by his best friend Sirzechs who thought of Minato to be a perfect devil.

Such a mistake of thoughts was understandable for someone who ignored some acts that Minato committed in the past. And the worst of them caused his later exile from the Underworld: He slept with Lord Bael's sister, Kushina Bael.

In the past, every devil was prohibited from touching that woman or even looking at her. She wasn't allowed to leave the Bael's territory due to her enormous power and beauty, because she was a threat for any clan heir who wanted to marry her.

Minato, also one of the most desired men in the Underworld, managed to conquer her heart. They met each other in secret and, in one of their encounters, the fruit of their love transformed into a baby. But unfortunately for them, Lord Bael eventually found out about their meetings.

Now, if only the ruler of the Bael clan had been the one to prohibit her about that, the consequences wouldn't had been so terrible. The problem was that the new Four Great Satans supported him in his previous decision. For that reason, Minato had broken the law.

Despite that Sirzechs was his best friend, the only thing he could do was to convince his companiors to save Minato and put him in an eternal exile to another dimension. The Phenex leader accepted his punishment and left the Underworld, letting his younger brother to take the place of head of the clan.

Obviously, Lord Bael wasn't satisfied and he wanted more payback for the crime committed to his sister. In an act of extreme cruelty, he asked that Naruto —Kushina's unborn son— had to be killed. And thanks to his clan's position as the most important he almost got away with it.

Sirzechs Lucifer, honoring his friendship with Minato and Kushina's and the Phenex clan's petitions, managed to convince the other leaders to give the boy an opportunity. However, Kushina's brother asked for a temporal exile as well and the council couldn't refuse to it.

The Four Great Satans decided that Naruto Bael Phenex had to be exiled to the same dimension than his father when he turned 5 years.

~The Legend of the Bael Child~

"Naruto! come here honey!"

The sweet and melodic voice of his mother interrupted his fun with a Dandelion flower. Smiling, the little boy stood up from the ground and ran to his mom. His little hand carried on the same flower from before.

It didn't take him more than two seconds to reach her, his short arms extended quickly to gave Kushina a warm hug. "Kaasan!", he shouted breaking the hug in a moment to show her the flower. "Look! It's for you!"

She smiled gently, her beautiful face softened deeply. "Why, thank you very much. It's really beautiful"

The boy looked in joy as his mother took the Dandelion and placed it on her red hair. Her beauty seemed to be highlighted by the new flower in her long and bright hair, and Naruto couldn't stop looking at her.

Kushina Bael was one of the most beautiful devils in the Underworld, her slender but feminine build was a definite plus for her. She had fair skin, pretty violet eyes, fiery red hair with strands that framed both sides of her face and a black clip that parts her hair to the left, keeping it out of her eyes.

She wore a high-collared, long sleeved black blouse with its zip starting on the top and finishing just above her cleavage. However, the blouse only reached to her upper back, leaving only a blue shirt to compensate it. Also, she wore black pants and black shoes along with the symbol of the Bael clan on her chest.

He was a little boy, after all, and didn't know why most men called his mother beautiful. Not that he had any concept of beauty. "Hey Naruto-tan! I'm talking to you!"

The new voice broke him out of his daze. Tilting his head to the side, his blue eyes noticed the figure of his godfather standing next to his mother. "Sirzechs-ojisan!"

Sirzechs Lucifer laughed at his nephew's sudden excitement, his hands reaching his blonde hair to make it more messy. "It's been a while, hasn't it? But look at you, you're more taller than the other day!"

Naruto grinned with happiness, his perfectly white denture shining with the daylight. "Heh, someday I'll be taller enough to take your place!"

There was amusement in both Kushina's and Sirzechs's faces, "Oh? but that's exactly what Rias-chan wants!"

"Who's Rias?", the boy asked looking at his mother in disbelief. The man retired his hand from Naruto's hair, his eyes closing in thought.

Kushina put a hand on her son's head and pointed to Sirzechs' left side. The Lucifer nodded with his eyes still closed and revealed a little girl who was standing with an smile next to the man. "Sochi, she's Rias Gremory, your godfather's little sister"

Naruto gazed immediately at the girl, her crimson red hair swaying calmly with the wind. "I'm Naruto Bael Phenex, it's a pleasure to meet you". Despite the first impression, the grin on the boy's face faded immediately and he gave her a deep and polite bow.

The introduction surprised Rias, who couldn't help but open her mouth in pure astonishment: Such a little boy was also a gentleman?. However, her brain eventually made her react and she introduced herself. "You already know my name", she said with a sly smile.

Looking more closely, Naruto noticed her full appearance. She was a girl of his same age with light skin, blue-green eyes and a petite figure. Her most distinctive feature washer long, crimson red thigh-length hair, with a single hair strand sticking out from the top. Her hair also had loose bangs covering her forehead and side bangs framing her face.

Kushina pushed Naruto forward suddenly, her hands moving from his head to his shoulders. "Why don't you two go to play? I'm sure you will get along very well!"

As she expected from her son, he nodded and motioned Rias to walk with him to the little garden the park had. Grinning, she followed him closely, her little arms were behind her back.

When both children were far enough, Sirzechs's expression adopted a sad look. "Kushina, are you really planning to escape with your son?", he asked in a low tone. His voice was deep, and had nothing more than seriousness. "I'm completely against it. I've the same right to train my nephew!"

Kushina kept her eyes in her son, the calm vision of that day was giving her a bit of nostalgy. "I can't allow Minato to be the one to spend part of his exile with Naruto. I mean, he'll train him in the Phenex's abilities but he's part of the Bael Clan too. He needs me"

Sirzechs sighed in resignation, his blue eyes looking into the purple sky. "You know that your brother won't be pleased with your decision. He can barely stand with Naruto living as part of the clan, but he'd be furious if you leave this dimension to join Minato"

The woman retorted with an unladylike snort, her smirk pointing directly at her friend. "It's true that I love my brother, but Minato and Naruto are more important than him", she assured. "I don't really care if the council will prohibit me from returning here. The only thing I want, is to train my son properly. He needs to be more strong than any devil, fallen angel or even angels"

The Gremory looked at Kushina with widened eyes, his own shock prevented him from talking anymore. Why she wanted to get that far in training Naruto-tan? Maybe because she was a proud devil, and also one of the most powerful?

Sirzechs didn't really know about her purposes, but if she was really going with her son then he wouldn't be able to change her mind.

~The Legend of the Bael Child~

"So... are you really part from the Phenex Clan?"

Naruto kept his sight on the beautiful Dandelions, his smile wavered slightly with the question. "I am. My father is Minato Phenex"

Rias widened her eyes at that. She was four years old —like him— but the only thing she knew was that Kushina Bael was his mother. Maybe her brother ommited that the exiled devil was his father. "Oh, sorry if I was rude. I didn't meant to be like that, I was just curios"

"Don't worry, I'll be seeing him next year so it doesn't really matter", Naruto explained diverting his eyes to look at the sky.

There was a moment of silence than none of them dared to break. However, Rias's curiosity quickly forced her mouth to open. "And it's true that your wings are of fire? what about imortality? and- and-"

Naruto chuckled at her final stammering, Rias's cheeks blushing slightly at her own excitement. "Well... I'm not supposed to reveal my powers to other devils until-"

"Come on! Please~?", the interruption came abruptly and he stopped with his mouth half opened.

The boy noticed the pleading tone she used, as well as how big and beautiful her eyes turned to be. Her hands were intertwined, and she was very close of his face. Looking to both sides, Naruto sighed. "Okay... I guess I won't have any trouble if you promise to keep the secret"

Rias grinned with excitement, "I promise it! Now, would you show me your wings Naruto-san?"

The Phenex raised an eyebrow as he stared into Rias's eyes. "I never said I'd do something like that. In fact, the only one who had seen my wings is kaasan", Naruto explained, making the little girl pout in disappointment. "But I do have the manipulation of fire like other members of the Phenex Clan. There are, however, a lot of powers that my mum wants to test if I've them inside me. One of them, and most important, is the Power of Destruction that both my and your mother have"

"How do you know that?", right then Rias's face showed only pure surprise by what he said.

Naruto laughed and scratched the back of his head awkwardly, "Kaasan told me that a few months ago, when we were having dinner with Lord Bael". There was a pinch of despise in his voice, and the way his expression turned grim in an instant showed exactly that. "But that's great! I mean, she said that a child of a Bael's member can have that ability too!"

Rias giggled at his enthusiasm, "Onisama said exactly the same than Kushina-sama. It's weird... but I'd really want to try that power if I've got the chance!"

"Even if you could, you won't be as powerful as me. I mean, I'll train so hard that even the Four Great Satans will be nothing against me"

Both of them looked at each other, their eyes filling with a defiant brightness. "Oh really? How about we place a bet?", Rias proposed looking over her shoulder to see if her brother was listening. "If you're more powerful than me... then I'll marry you. On the contrary, if my own strength obliterates you then you'll be part of my peerage"

Naruto, for the first time of the day, had to shut his mouth up to think about it. The conditions weren't so bad, apart from the fact that he was too young and didn't know what marrying a woman was. But, if Rias took that as a condition, then it had to be something good right?

Grinning, the boy stood up suddenly and helped the little girl to stand as well. Then, looking at each other, they shake their hands. "Deal. When I come back from my exile we'll have a battle to show our abilities", Rias nodded in agreement. The way of dealing it wasn't really clever, but she was fine with it.

"Oh, Naruto. You're going to regret this"

And he did. One year later, Naruto and his mother left the devils's dimension and traveled to Minato's new home. They found a strange world, filled with strange yet powerful humans who were called 'Shinobis'.

It took Naruto Bael Phenex almost 11 years to complete his exile. But, after living in that place, he wasn't the same anymore.

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So, that's it ladies and gents. I hope that despite being rushed, it has caught your attention. This will turn more and more interesting.

What do you think about the story idea in general? I mean, I know some of you would want to complain about my mistakes and that the chapter was boring and rushed, but don't waste your time doing that. In fact, I only accept constructive critics.

As always, try to write good reviews. Flamers will be dutifully ignored. Well Ja Ne!