Hey guys! Welcome to my new story!

I had planned on writing a NarutoxHighSchoolDxD story for a while now.

Big shout out to Crowfeast for helping me out with this story and for giving me permission to use some of his ideas.

I recommend going and reading his stories. They are really good. I will let you know they are written in first person but read them nonetheless. Give them a try. It will surprise you.

Enjoy!

Underworld

"Aaaahhhhh!" Screams could be heard through the a mansion in the underworld. The person of said screams was none other than Venelana, formerly Bael, Gremory. A women that had beautiful brown hair. She is the current Lady of the House of Gremory.

"Ow ow ow oooowww!" Cried a young looking man. He looked no older than Venelana Gremory. He wore a white jacket with yellow trim. Underneath he wore a black collared shirt. He was Zeoticus Gremory, husband and current head of the House of Gremory.

The reason for his screams of pain? His wife was crushing his hand. The reason why she was crushing his hand? She was currently giving birth… to twins. So you can say she was in a bit of pain.

"Honey, you're breaking my hand!" Zeoticus cried out only for the pressure to increase. His wife glared daggers at him.

"I'm sorry dear," She said so sweetly that you could get a sugar high, "I would gladly trade places with you if you want!"

Zeoticus paled and shook his head furiously.

"I can see a head!" Exclaimed the doctor in the room. "I need you to push now Gremory-sama."

The next ten minutes were followed with grunts, screams, and crying. The crying from one Lord Gremory from his injured hand.

"Congratulations Lord and Lady Gremory, it's a boy." The doctor said handing them the crying baby.

The baby was taken by Venelana into her arms.

"He has your hair Zeoticus." She spoke lovingly while cradling her child.

"Yes he does but he certainly whines like you do." Zeoticus said trying to make a quick joke. He froze when he saw the dark, murderous aura that she was giving.

"What did you say?"

"I said I'm going to get your other child." Zeoticus responded while quivering.

"Good. That's what I thought you said." She said smiling. All traces of murder gone.

Zeoticus stood up from the chair next to his wife's bed and went to a nearby crib and picked up a baby and brought him back to where his wife was.

This baby had crimson red hair that had the same style that Venelana has. He was the definition of cute among babies. What stuck out most though were his eyes. Instead of the teal color or violet that his parents had, he had the colors of his grandfather's. He had electric blue eyes that showed warmth and love.

"Naruto, say hello to your younger brother. You are now in charge of him only if you are an hour older than him." Venelana told her child.

"Have you decided on a name for him yet? I have already named our firstborn." Zeoticus asked his wife. He absolutely love Japanese culture. When he went to the human world, he also loved their language. That is where he got the name Naruto. Maelstrom. Not the fishcake that is used in ramen. Took his wife convincing to name him that.

"That I have. Sirzechs. Sirzechs Gremory." Venelana said. Zeoticus smiled at the name.

"That a lovely name. Just as lovely as you." Zeoticus said. Venelana smiled at her husband before taking Naruto in her arms along with Sirzechs.

"Naruto, you must protect Sirzechs now. Remember, family is the most important thing. We always take care of each other and never betray one another." She said.

None of the occupants in the room would never know how important those words were and how they were ignored.

Six years later

"Haha!" Laughed a red haired child. "You can't get me nii-chan!" He yelled out.

Behind him was another red head chasing after him. This redhead was currently keeping his distance though. He was much faster than his younger brother. Ever since he could remember he was always faster than anyone his age, hence why he was keeping his distance. It would be no fun if he would catch his brother instantly.

"Come on Naruto-nii, you're too slow!" Cried the younger child.

The now revealed Naruto smiled. He loved his brother. They were almost inseparable. Naruto would say he was as close to Sirzechs as he was to Ruval Phenex.

Ruval was the current heir to the House of Phenex. They had met when their parents needed to talk about grown up things just like the other houses. Those included the House of Astaroth, House of Sitri, and the House of Glasya-Labolas. Their respective heirs were: Ajuka Astaroth, Serafall Sitri, and Falbium Glasya-Labolas.

He had met all of them multiple times before but he would not say he was as close to them as he was with Ruval.

Well, except for Serafall. In the eye of her parents and others she was very serious.

She acted as if she had no emotion that never heard of the word fun. But when she invited Naruto to her room, she went ballistic. From yelling about how boring and meaningless all these meetings were to how she just wanted to play and not be a 'stiff' all her life.

Don't get her wrong, she liked having manners and being smart. She just hated not having fun while 'business' was happening.

That was the day he became friends with Serafall.

He also befriended the other heirs also. Ajuka was a very respectful child and talented child. While he wasn't as serious as Serafall was when she was in 'business' mode, he did show respect to others. He also had a weird addiction/fetish for making new inventions. Such as a device that helped the maids clean. He believed he called it a vacuum.

Falbium was a very outgoing boy. He always wanted to do something. He could never sit still no matter what you did. They were a ragtag bunch of kids that formed good friendships with each other.

Now that is to say that Naruto and Sirzechs were without their quirks.

Sirzechs was extremely childish. Them being six years old had nothing to do with his behavior. He acted ten times more childish then Serafall did. That was a lot. He seemed to not know when things were serious or when to be serious.

Now Naruto was an enigma. He had one of the weirdest quirks of them all… ramen. Some say he just liked the dish while his mother says he was cursed because of his name that his father gave him. He didn't care, all that mattered to him is if he got to eat ramen once a day.

Other than his ramen addiction, he was also a blend of all the others personalities. He was very serious when he needed to be. Childish when with his friends. When it came to training, he showed more enthusiasm than Falbium. He was a believer in hard work. For most devils, they believed that you had to be born with greatness. He was not.

He was not as fortunate as his brother Sirzechs. While Sirzechs was able to his his mother's ability the power of destruction, Naruto was born with vast magic reserves… that no one noticed. His body naturally hid his massive reserves only allowing a little more than average to be noticed. Not that he knew he had massive reserves either.

"Sirzechs! Watch out!" Naruto shouted out.

Sirzechs was currently looking back laughing at Naruto so he was unaware of the China cabinet that was ahead of him. By the time he turned around, Sirzechs slammed into it, knocking down the plates, mugs, and other dishes down, shattering on the ground.

Sirzechs adopted a horrified expression. His mother would kill him. She was a scary women when she put her foot down.

Before him or Naruto could do anything, they heard a sickly, sweet voice.

"What happened here, kids?" The crimson haired brothers turned around to face their horrifying mother. Her aura screamed run. But they couldn't as it froze their bodies where they stood.

Sirzechs gulped and tried to form an explanation in his head to tell his mother and await his death. He opened his mouth to speak-

"I did it."

-and was interrupted by Naruto. He stared wide eyed at his brother. Did he want to die?

"I was chasing after otouto and wasn't looking where I was going. I ran into the cabinet and broke everything." Naruto stared into his mother's eyes, meeting her ferocious stare.

Sirzechs was just left gaping like a fish. He ran into the cabinet. He broke his mother's dishes. Why is Naruto taking the blame?

"Is that so?" Naruto nodded. Venelana rubbed the bridge of her nose and sighed. "Clean up this mess and then go to your room. No maids are to help you, understood?" He nodded. "Good. Also no ramen for a month."

The moment those words left her mouth Naruto felt his heart break. How would he survive?!

"Sirzechs, let's go. You have training to finish." Venelana said as she started to walk away. Sirzechs stayed behind.

"Why? Why did you take the blame?"

"Why? You're an idiot. It's my job to protect my little brother is it not? If you took the blame, kaa-san would punish you." Before Sirzechs could respond they heard Venelana shouting to Sirzechs.

Sirzechs left, leaving Naruto behind to go train, not knowing this would be an everyday occurrence for years to come.

Time Skips

That was the life of one Naruto Gremory. At first it was nothing major. He understood that Sirzechs had the power of destruction, so he needed to be trained in it. So he was trained later a year later in basic magic such as water, wind, fire, earth, and lightning magic. He found he was very adept in lightning magic to where he could send lightning to different parts of his body to increase his speed and shock opponents when he touched them.

But that was all he was trained in by his parents. The moment he mastered the basics, they left him to his own devices and continued to work with Sirzechs. While Venelana left nothing to Naruto to help, his father let him have his old magic books from when he was a kid before abandoning him for Sirzechs.

By the time he turned ten, he perfected all basic magic. He could wash and clean himself with just his magic and not making a mess. He was able to repair the training ground outside when he used more destructive magics. He could power the whole city with just his lightning magic.

The maids were really impressed with his growth. The already took a liking to him as he treated them as family. While all the Gremory's did this, he went a step further and would do his own laundry or clean his room saying he didn't want them to have to work so much. Some became smitten with him.

Then came his grandparents. They visited quite often saying it was for checking on how the Clan head was running things. But they actually just wanted to spend time with their grandkids. They also came to see how they were improving.

They were impressed with Sirzechs use of the power of destruction but also a little disappointed because he had low aptitude for any elemental magic. Plus, the power of destruction was not a Gremory trait so they did not like him being so advanced in a Bael trait.

They were astonished in Naruto's skill in elemental magic. They way he used each spell with flawlessness and not even breaking a sweat was amazing. Especially when he showed him his speed while channeling lightning magic in his limbs. It showed the Gremory's adaptedness and powerful magic that they are known for.

Zeoticus and Venelana paid it no mind as they thought it was normal for someone to be able to use basic magic that easily.

Something that his grandparents did not miss.

This continued for decade. During that time, Sirzechs then started to abuse the fact that Naruto would always take the blame for him. Whenever he would break something or destroy something with his power of destruction, he would immediately blame Naruto.

To say Naruto was furious was an understatement. He was fine taking the blame when they were children, but taking the blame while they are teenagers? Obviously Sirzechs was still a spoiled kid. But, he let it go. He was family after all.

This remained until the great war happened. The war between Angels, Fallen Angels, and Devils.

Naruto didn't know how or why the war started, but he knew the devils were involved in it now.

It was a terrible war. Casualties, bloodshed, and tears. The war had lasted over a century. The devils and fallen took the most losses as they had no means of repopulating their race besides the standard ways. But for the devils, it was worse considering devils can go centuries before having a child.

The devils were barely standing their ground in the war. That all changed when Naruto was able to improve the most basic magic spell. Teleportation.

With his massive reserves that he became aware of when he was twelve, he was able to spread a circle big enough to teleport hundreds of devils.

A power like that made the war shift. While they had a army confront the enemy, within seconds they would outnumber the enemy forces by three-to-one. That forced the fallen to retreat and only fight if anyone forced their way on their territory and cause heaven to convert more humans to angels.

And then it all stopped. The fights ended with the death of the four Satan's. But that would have been a great opportunity to finish the devils… but they didn't.

Naruto thought that was suspicious. The angels had all the humans in the world to convert, so why call for a truce? Unless they lost God in that battle between the Satan's.

It didn't matter as the leaders accepted the ceasefire. But that lasted only a few decades.

The most prestigious houses took over leadership. One of them being the Baels.

But the former Satan's descendants wanted to finish off the fallen. The fallen had lost many during the war.

But so did the devils.

The devils were in the millions before the war. Now they were only above a million maybe two in numbers.

This caused a civil war to break out. The old faction against the rebels.

The leaders of the rebels were none other than the future clans children. Naruto, Sirzechs, Serafall, Ajuka, and Falbium. They led the revolt against the old faction.

Many more devils were lost. Slowly making them become endangered. Then Naruto did it again. While he couldn't transport hundreds anymore due to devils being spies for the old faction, he perfected the transportation circle.

He trained days and nights to get it down. It took blood, sweat, and more blood to perfect it.

Instant teleportation.

Now while all devils could do and use this magic, Naruto made it his own. He was able to use it without the use of the Gremory seal making it an 'invisible' teleportation. But that's not all. He required no time to use it at all. All he had to do is think about where he wanted to be like a standard teleportation but instead of waiting for the circle to charge he instantly teleported. (Think Hiraishin). The drawback was physical exhaustion.

He could use it a minimum of five times before sweating and ten before falling to his knees. Eleven and he went unconscious.

That is what made the civil war end.

The five of them charged the deceased Lucifer's home and did battle with the four Satan's children. But they were expecting this. Because at the entrance stood one woman who had destroyed countless rebel forces. The one that stood before them today.

Grayfia Lucifuge.

A stunning beauty from the Lucifuge clan. The LAST of her clan.

"Your resistance against Lucifer-sama ends here." She stated with a cold, emotionless voice. Naruto stepped forward.

"Listen Gray-chan," he dodged an ice spear. "We just want to end this horrible leadership. Your current 'masters' want to go to war with the fallen. We lost too many devils in the war and we would lose more against the fallen." His friends nodded.

"What about your own fighting against us?" She inquired. "Have we not lost many of our own in this civil war?"

"We have… but that is what we and the rest of the devils want. If we were to attack the fallen, heaven may get involved thus causing another great war. This is to keep our race alive."

Grayfia didn't respond. Instead she stuck her hand towards them and had ice spikes shoot out the ground. The rebel leaders jumped out the way.

"You guys go on ahead! I'll deal with her!" Naruto shouted. They were reluctant but went ahead knowing how stubborn Naruto could be.

As he watched them go, Grayfia trapped his legs in ice.

"I am sorry but I have to end you now and take care of your friends." Grayfia said as she formed an ice spear in her hand and went to throw it. She stopped as she heard him speak.

"Why?" He asked. "Why would you listen to him? Rizevim just wants to start a pointless war. For what? To have our race driven further to extinction?" Grayfia lowered her spear. "You are the last of your clan. House of Lucifuge is gone besides you. Why? Because of the war that happened. Many other pillars were taken out as well. We are currently down to thirty-seven houses left. Why fight us and lose more?" She dropped to her knees. "I know it must be hard. Losing loved ones. I lost friends and family in the war. Even the maids in our home were killed because of this civil war."

He channelled fire magic to his legs and broke the ice. He walked over to her and got down to look in her now tear filled eyes. "Join us. I can give you a home and treat you as family. If you don't want to be apart of my family, then we will let you live on your own. Their is no reason for you to die. Your family's name will end with you if you keep fighting for the wrong side."

She stared into his calm, alluring blue eyes. She saw no deceit or greed. She saw concern and regret for what he might have to do.

"I hate killing. But if we have to keep the peace we have, all those who try to disrupt it will have to die. There won't be a true peace until every faction understands each other, but until then, I will try to keep peace as much as I can." Naruto stated. Grayfia was entranced with his words and determination. "Will you join us Grayfia-chan?" Naruto stood up and held out his hand.

Grayfia looked at him for a moment before nodding her head and grabbing it.

"Good. Now let's go help my otouto. He tends to get reckless." As he said that, an explosion happened destroying half of the mansion.

As they reached the mansion, Naruto's brother and friends were having a hard time against three of the four Satan's children. Rizevim was just standing back watching the fight ensue in front of his eyes.

"Grayfia, go help them out. I'll deal with Rizevim." Naruto didn't wait for a response as he shot off towards Rizevim who didn't see him coming till he was punched through the wall.

Rizevim stood up holding his now bruised jaw. When he looked to see who hit him, he scowled deeply.

"So, I finally get to meet the heir to the Gremory house and hero of the Great War!" Naruto just frowned.

"I don't care what you call me. I will end this attempt at causing a pointless war." Naruto told him.

"Do you not see what I am trying to do? We can become the most powerful race and no one will be able to stop us!"

"You disgust me!" Naruto sneered. "You would kill millions just for your crazy war obsession!"

"It matters not. I figured this would happen. So I will be taking my leave." With the snap of his fingers smoke exploded around him and he teleported away.

"Damn!" Naruto clenched his fists. He turned to his comrades and saw they were struggling. Within seconds he was with them.

That was the moment the civil war ended. Naruto killed two of the three remaining Satan descendants on his own.

You would think that after all his accomplishments and respect that others showed him, Naruto's life would be great.

You would be wrong.

His parents were congratulating Sirzechs on being a huge help with the war. Saying that his strength with the power of destruction saved them all.

That didn't matter to Naruto as long as his people were safe. Then things became worse.

The Houses that took over when the original Satan's died, they decided to have four powerful devils to take their names and place. The obvious choices were the ones who had the biggest effect in the war.

The problem was that there was six total candidates. Two of the four spots were more than likely going to be fulfilled by Ajuka and Falbium as Beelzebub and Asmodeus. The problem was who would take the title of Leviathan and Lucifer.

Serafall and Grayfia were the candidates for Leviathan while Naruto and Sirzechs for Lucifer.

Naruto didn't care for a title though. A title didn't give you strength or power. It showed when humans were able to kill even the strongest of devils without the use of holy weapons.

All that mattered was his beloved. Grayfia. After the civil war had ended many things happened. Ajuka made the evil piece system that would convert any being to be part devil. A chess set that Naruto had received but didn't plan on using it any time soon. Falbium increased the military training making them a forced to be reckoned with. And Grayfia swore her allegiance to Naruto.

Naruto turned her down and said if she really wanted to, they could go on a date as he did not like the idea of having servants.

To say they hit it off was an understatement. Many devils were jealous of their relationship because they seemed to be a perfect couple. Girls looked at Grayfia in envy, none more than Serafall. While men just glared at Naruto for having such a beauty by his side. All the devils knew of their relationship. But none ever hated them for their relationship as they deserved happiness for their efforts in the war.

Then the rumor started. Sirzechs Gremory would become Lucifer. The ones who started the rumor were none other than his parents. Backed up by the Bael as they wanted the title of strongest Maou to be a Bael.

Naruto did not care until it changed his life forever.

He was headed towards his home that he built on his own for him and Grayfia. He had a black box in his hand. It was something very special that Lady Phenex had helped him pick out for Grayfia. He loved her. And she loved him… or that was what he thought when he opened the door and saw what was going on in the living room. His blood boiled.

There on the couch was Grayfia and Sirzechs. Going at it like rabbits.

He dropped the box with a thud. Grayfia heard this and looked at him. Her face turned from one of pleasure to one of horror.

She did not mean for this to happen. She didn't mean for any of it to happen. She loved Naruto. Loved. He was her first love. But that love slowly dwindled as she started to find Sirzechs attractive. She didn't want him to find out this way.

Sirzechs was sweating bullets. While he may act like he was better than Naruto in public, he knew Naruto outclassed him many times over.

Thus a battle of brothers took place.

Naruto blasted Sirzechs through his home to the front yard.

Sirzechs got up quickly and fired of his power of destruction that also alerted the others devils in the underworld intentionally.

Naruto evaded it with ease as he knew how the power of destruction needed a few seconds to charge.

Naruto flashed in front of Sirzechs, punching him in the cheek with a lightning infused fist. Electricity coursed through his body as he skidded across the ground.

Naruto then jumped in the air before falling and striking him in his gut with his heel.

Sirzechs sat up from the force vomiting blood.

Naruto stood a few feet in front of him charging his entire arm with lightning magic. It was so strong that it was changing color from yellow to blue to faint traces of black.

By this time every high standing devil and officials came to the scene. They saw a semi destroyed house and a beaten and bloodied Sirzechs sitting a few feet away from an enraged Naruto.

Many gasped at how angry he looked. Naruto was a kind hearted soul. Even during the war he didn't show this amount of hatred and… betrayal? This left many devils confused. None more than the Phenex's, Gremory's, Sitri's, and Naruto's friends.

Naruto ran towards Sirzechs with his arm pulled back intending to punch him through the heart. It would have happened if a pillar of ice appeared in front of Sirzechs. It was demolished to bits and pieces as Naruto struck it.

He looked next to Sirzechs to see Grayfia standing there.

"Why?!" Naruto screamed with tears falling down his face. "Why?!" Grayfia showed very little guilt in facial features.

"Because… I love him." All the devils that gathered were dumbfounded. Who did she love?

"How long?!" Grayfia looked confused.

"How long wha-"

"HOW LONG HAVE YOU BEEN CHEATING ON ME WITH HIM?!" Naruto yelled. The devils were shocked. They stood their with their mouths gaping while others looked on with disgust in their eyes.

"A month…" Grayfia said. Serafall was furious. She wanted to kill Grayfia. She stole her childhood crush from her and then throws it away for some arrogant man child. Before she could act, Naruto spoke.

"I'm done." His red hair covering his eyes. "I'm leaving the underworld. You Sirzechs are no longer my brother. We may be by blood, but that is it. The only connection I will have with you and our parents is by blood. I've dealt with your bullshit and our parents favoritism towards you for too long now. But I'm done. I've protected you, helped you, even took the blame for you. But I can not forgive you for this. We are no longer brothers." Sirzechs actually looked sad as the brother he admired when they were kids disowned him. Naruto looked at Grayfia.

"And you." Naruto said. "I gave you my heart and soul and you tossed it away. You're nothing but scum." Grayfia got wide eyed. His eyes turned ice cold, colder than hers and Serafalls ice magic. What he said next were his final words that anyone would hear for a century. "I should have killed you when I faced you at Lucifer's castle." He then disappeared in a red flash.

The devils were astounded. Never had Naruto wished death on anyone before. Not even angels, fallen angels, or even god during the great war. He believed everyone deserved to live.

Many were sad and upset at what happened. Serafall was in tears along with Lady Phenex as they were the closest to him. Lord Phenex and Ruval, along with the Sitri, Astaroth, and Glasysa-Labolas had sad frowns.

The Gremory's and Bael's showed no emotion. Their decision for Lucifer just became much more easier.

With Naruto

When he appeared out of his teleportation, he was met to a sight of nothing a vast sea of rainbow colored distortions. He turned around as he sensed a presence behind him.

"For you to be allow to feel my power must mean you are close to my level." Naruto took in her features. She was a little girl with black hair and what appeared to be Gothic lolita dress.

"So it was you who messed with my teleportation magic, Ophis."

She showed no emotion to him knowing her name.

"I want you to help me." She stated.

"And if I say no."

"You die." She responding showing no traces of emotion.

"What is in it for me?"

"Power."

"I have power. I think I'll pass." He responded. She looked upset by his answer. She started to channel power.

"But." She stopped her attack that she was going to send his way. "How about a little wager?" She quirked an eyebrow.

"We have a spar. Spar. Means no killing blows. If I win, he send me to other dimensions so I can get as far away from this damned world as possible."

"And if I win?" She asked.

"You pick." He shrugged. She nodded.

"You have to help me…" he nodded. "And become my mate." Naruto face planted in the ground...air? Whatever they were standing on in the void.

Naruto looked unsure about it but that would be better than his relationship that just ended minutes ago.

"Deal." Before he could say anything else, he had to dodge a blast that would have taking his arm off.

"I said no killing blows!" He yelled.

"That's why I aimed for your arm." He sweat dropped.

Thus began the battle that was felt across the different realms.

That was chapter one guys!

Hope you liked it! Not much happened but this is the prologue of sorts.

Now before you get all mad, I know some of the events didn't happen in the anime but isn't that what fan fiction is?

I changed things up a little.

And before you say I tried to steal the Grayfia cheating on Naruto from SoulReaperCrewe's story Fire & Ash, I did not. I got the idea from him but I am giving full credit to him for that idea.

Also, another big thanks to Crowfeast for helping out with this story. Also for letting me use a few of his ideas such as Naruto's grandparents and some peerage members that I will be introducing next chapter.

Naruto's peerage will include characters from these anime's: HighSchool DxD, Naruto, Akame ga Kill, Rosario+Vampire, Dragon Ball, and maybe a few others. If you have anyone you would like to see, let me know and I might add them.

So till next chapter,

Bye!