In a New World as a Shinobi God

Clarifications:

-"Person Talking"-

-(Person thinking)-

--

[Jutsu]

(JC: Author's Notes)

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Let us begin

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2 Years Later

(JC: The year the series began)

In one of the vast territories of the Demonic Faction, there was the Gremory Castle; a gigantic and beautiful castle from the Victorian era, which came with a beautiful and extensive garden with many varieties of flowers and plants. This Castle belongs to the Gremory Clan, one of the remaining devil clans of the 72 pillars and one of the highest ranking devil families; as one of the most famous. Also known for being the Clan that produced the current "Lucifer".

Currently many famous people and powerful clans of the Underworld were entering the castle in gala clothes; after all, today is an important day.

Today was April 9th, the day that the heiress of the Gremory Clan, Rias Gremory, would turn eighteen years old.

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Currently, Rias Gremory's birthday was being celebrated in the elegant and beautiful party hall of Gremory Castle. Many Devils were chatting or eating the elegant meals at the tables.

Sirzechs Lucifer, the current Maou Lucifer, was sitting at the main table along with the other Maou and the main members of the Gremory Clan.

Sirzechs looked at the whole party with a smile; happy that everything was going well at his dear sister's party. He looked towards the center of the hall, where his sister was, who was receiving congratulations from the guests and even high-quality gifts.

Sirzechs then looked away towards his fellow Maou; to see that the only one who was socializing with the guests was the Maou Beelzebub, Ajuka Beelzebub. While the Maou Asmodeus, Falbium Asmodeus, was sitting at the table half asleep; something that did not surprise Sirzechs.

But what confused Sirzechs the most was the attitude of the current Maou Leviathan, Serafall Leviathan.

Serafall is a cheerful and fun person, who possesses a childish personality; but since the beginning of the party, she has been sitting and quiet.

She didn't even bring out that childish personality when her younger sister and the next heir of the Sitri Clan, Sona Sitri, appeared.

Sirzechs thought that it seemed like Serafall was waiting for someone.

-(It must be nothing)-

Sirzechs thought with a shrug.

Just after thinking that, a portal opened in the center of the hall, surprising everyone.

Seeing the situation, the guards quickly surrounded the portal; being prepared for any situation.

The Maou quickly came over to inspect and prepare to give orders if the situation became dangerous.

Suddenly, a person walked out of the portal. He was 1.80 m tall; He wore a white coat with a sky-blue flame-shaped border and the words Shodai Yōsokage were inscribed vertically on the back, and it was closed in the front by a thin orange rope that fluttered through the air. He had a triangular hat with sky-blue details with a veil on the back that covered his entire head. Under the coat he wore black ANBU pants with orange stripes on the sides and a tight black T-shirt that showed off his well-built physique.

When the person came out of the portal, the guards quickly pointed their weapons at him.

The person just stood there.

Sirzechs looked at him seriously. -"Identify yourself."-

The person smiled. -"Hey, is this any way to treat an old friend?"-

The Maou, along with several people, widened their eyes in shock as they recognized the person's voice. But Serafall was the only one with a big smile.

-"It can't be..."- Sirzechs muttered in surprise. -"Are you-?"-

But he quickly fell silent as he saw the person take off his hat.

Taking off his hat revealed a large head of unruly red hair with golden tips, and a white lock. A notable feature was three whisker marks, like those of a cat or fox, on each cheek; as well as deep, bright blue eyes.

-"It's been a while"-

The person said with a smile; showing that it was none other than Naruto Uzumaki-Namikaze, the Hero of the Devil Civil War, and also known as the Sun of the Underworld.

Everyone fell silent as they saw their missing Hero, or also known as a myth to young devils.

But that silence was quickly broken.

-"Naru-kun, you're finally here!"-

Serafall shouted happily, after having approached Naruto quickly enough to hug him.

-"Hello, Sera-chan"- Naruto greeted her with a smile, while returning the hug. -"I'm glad to see you again; letters don't compare to being with you"-

Everyone blinked in confusion upon hearing what Naruto said. -(Letters...?)-

But before they could ask, other people came out of the portal.

-"Naruto-kun"- One of the people spoke. -"Aren't you going to introduce us?"-

-"Oh, right"- Naruto stopped hugging Serafall so he could point to his companions. -"Sera-chan, I'd like you to meet my wives Haku, Pakura, Guren, Yugito and Fū; and my girlfriend Yamato"- Then he looked at his wives. -"Girls, this is Serafall, the one I told you about"-

-(Wives/Girlfriend!?)-

They all thought surprised; except Serafall, who quickly introduced herself.

-"It's nice to finally meet you"- Serafall said with a smile. -"Naru-kun told me a lot about you"-

-"It's a pleasure too"- Haku gave her a kind smile. -"Naruto-kun also told us a lot about you"-

-"Yes; and there were many good things about you"-

Yamato said with a smile, while looking at the blushing Naruto.

Serafall was about to say something; but she put it aside when she noticed something in the arms of Guren, Yugito and Fū, as well as three children next to Naruto, Haku and Pakura. She squealed when she knew who they were.

-"Are they-!?"-

-"That's right"- Naruto interrupted her with a big smile. -"They are my beautiful children!"-

-(Children!?)-

All the Demons thought even more surprised.

Naruto quickly encouraged the children to come closer and introduce themselves.

The first one to approach seemed to be ten years old. He has fair skin, long and messy black hair, and bright green eyes. A more notable physical feature is a lightning bolt-shaped scar on his forehead; it was barely visible through his hair.

-"It's nice to meet you, Serafall-san"- The boy greeted with a smile. -"I'm Harry James Potter-Uzumaki"-

-"Harry-chan!"- Serafall shouted, then gave Harry a crushing hug. -"I can finally meet you!"-

Harry waved his arms in panic as he couldn't breathe.

-"Hey, Sera-chan"- Naruto said nervously. -"You should let go or he won't be able to breathe"-

-"Huh?"- Serafall blinked in confusion, then realized. -"I'm sorry!"-

Serafall apologized as she let go of Harry, who quickly regained his breath.

-"I-It's okay"- Harry said with difficulty, as he received a shy smile from Serafall. -"I'm fine"-

Serafall then noticed two other children approaching.

One was a boy of about four or five years old. He has spiky jet black hair, bright blue eyes, and has two whisker marks on both cheeks.

The other was a girl of about four or five years old. She has long red hair, the color of which fades into an orange and then yellow hue as it progresses; giving the appearance of fire. She has brown eyes and two whisker marks on both cheeks.

-"Hello!"- The boy greeted cheerfully with a big smile. -"I'm Sasuke Uzumaki-Yuki!"-

-"Nice to meet you, Serafall-san"- The girl greeted politely. -"I'm Akane Uzumaki"-

-"They're so cute!"-

Serafall shouted, ready to go hug them; but the children quickly hid behind their father.

Serafall pouted at that, causing Naruto to laugh. But then she walked over to the girls to look at the little boys in their arms.

"This little boy is my son." Guren said with a smile as she looked at the little boy in her arms. "Akira Uzumaki." The boy looked to be about a year old. He has spiky purple hair, blue eyes, and has two whisker marks on both cheeks.

"He's my son." Yugito said with a smile as she looked at the little boy in her arms. "Raiko Uzumaki-Nii." The boy looked to be about a year old. He has straight blonde hair, blue eyes, and has two whisker marks on both cheeks.

"And this little girl is my daughter." Fū said with a smile as she looked at the little boy in her arms. "Hanae Uzumaki." The girl looked to be about a year old. She has straight blonde hair with green tips, orange eyes, and has two whisker marks on both cheeks.

-"They're so cute!"-

Serafall screamed with a squeal as she approached the little ones. But before she could continue playing with the children, Sirzechs fake coughed to get the group's attention.

-"Serafall, I think you have something to explain"-

Sirzechs told her with a smile; although his tone of voice did not show happiness.

Serafall sweated at the serious looks she received from the other Maou and all the heads of the Demonic clans. They were a little angry; after all, they spent years and years looking for Naruto, to finally find out that Serafall was in contact with him all this time.

But before there were more problems for Serafall, Naruto intervened.

-"Sirzechs, I know what you're thinking; but none of this is Serafall's fault. I asked her to keep it a secret"- Naruto explained seriously, then smiled. -"But changing the subject. Where's the birthday girl?"-

As if on cue, everyone looked at one specific person.

Naruto wasted no time and approached the person in particular; that being the heiress of the Gremory Clan, Rias Gremory.

Rias is a beautiful young woman with a voluptuous body, white skin, blue eyes, and a plump figure. Her most distinctive feature is her long, beautiful crimson hair, which reaches down to her thighs with a single strand of hair sticking out from the top. Her hair also has loose bangs that cover her forehead and side bangs that frame her face. She was wearing a beautiful red party dress that made her figure stand out.

Rias looked nervously at Naruto, with a blush of embarrassment on her face; after all, she was in front of a legend in the Demonic Faction. And secretly, Naruto is her childhood Hero.

-"First of all, happy birthday Rias-san"- Naruto congratulated her with a smile, then handed her a small wrapped box. -"And this is a gift from the Uzumaki family"-

Rias nervously took the box.

-"It's a small gift with a little secret"- Naruto explained, giving her a smile. -"I hope you like it"-

Rias just nodded dumbly.

Naruto then noticed the looks he was getting from all the Devils; only to smile shyly.

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-"I can't believe you were in contact with him all this time"-

Ajuka said to Serafall while shaking her head.

-"I can't believe you didn't tell us"-

Sirzechs told her with a frown as he looked at the nervous Serafall.

A few minutes had passed since Naruto's sudden appearance, and then the party returned to normal; or at least a little.

Currently Naruto was talking with his Maou friends, while his wives/girlfriends and children were talking to the Devils.

Naruto could notice his children Harry, Sasuke and Akane talking to Sirzechs' son, Millicas Gremory.

-"Sorry"- Serafall apologized a little embarrassed. -"But I promised Naru-kun that I wouldn't tell anyone"-

-"It's okay"- Sirzechs accepted her apologies, then looked at Naruto with curiosity. -"But I still don't understand why you left the Underworld. We were really worried."-

-"Yeah, sorry about that."- Naruto said sadly. -"But I had things to do and I was really busy."-

-"You were obviously busy."-

Falbium said with a mocking smile as he looked at Naruto's wives/girlfriends.

Naruto blushed at that. -"What can I say? It's been three hundred years."- He then smiled as he looked at his family. -"And I got to meet some wonderful people."-

While Naruto, Falbium, and Ajuka were talking, Sirzechs approached Serafall.

-"Hey."- Sirzechs looked at Serafall with concern. -"Are you okay?"-

-"Yes."- Serafall replied; confused by his question. -"Why do you ask?"-

-"Well, you know. Naruto is married and even has kids..."-

Serafall was still confused. -"And?"-

-"And that doesn't make you...? You know?"- Sirzechs spoke slowly. -"Jealous?"-

Serafall seemed to understand. -"Ah, that. Not really."- She smiled. -"Naruto is fine with them; from what he told me, they are great and wonderful women."-

Sirzechs blinked in confusion and surprise upon hearing that.

-"Also."- Serafall continued. -"I once received a letter from them."-

Sirzechs became curious. -"And what did it say?"-

-"That they allowed me to become one of Naru-kun's wives!"-

Serafall said happily, causing Sirzechs to open his mouth in shock.

-"What?"- Sirzechs asked surprised. -"That easy?"-

-"Yes; it seems that Naru-kun told them many good things about me."- Then Serafall put on a thoughtful expression. -"But I still wonder if they'll let me do something else?"-

Sirzechs raised an eyebrow. -"What thing?"-

Serafall put on a big smile. -"Let So-tan become Naru-kun's wife too!"-

Sirzechs looked at Serafall in shock.

-"Sona!? But why!?"-

After all, Serafall has a deep sister complex, and tends to get her sister into embarrassing situations. And Sirzechs was sure that Serafall would kill any man who came near Sona.

-"Isn't it obvious?"- Serafall asked as if it was obvious. -"I would only trust Naru-kun to marry So-tan."-

-"But what about Sona's opinion?"- Sirzechs asked. -"Isn't it that she would marry the person who would beat her in chess?"-

-"I'm sure Naru-kun would make So-tan fall in love with her in seconds"- Serafall said confidently. -"He's also very intelligent; he could beat her in chess"-

Sirzechs just shook his head upon hearing that.

-"Naruto-dono"- A voice spoke that caught Naruto and the Maou's attention. -"It's a pleasure to see you again"-

The person who spoke was Zekram Bael; the first head of the Bael Clan and a very politically powerful Devil.

Zekram approached the group along with several Devils.

Naruto looked at him calmly. -"Yes, it's been a while, Zekram-san"-

Of all the Devils he knew from the Devil Civil War, Zekram was the one Naruto liked the least. And even more so when he discovered the dirty secrets of him and his political faction: The Great King Faction.

-"It's good that you're back in the Underworld"- Zekram said with a small smile. -"We had been waiting for your return for a long time"-

-"I had planned to return earlier, but I was very busy"-

-"The good thing is that you're back"- Zekram smiled. -"And we hope that you don't abandon us again"-

Naruto raised an eyebrow upon hearing that.

-"That's why the Demonic Faction wants to offer you to join us with your family"- Zekram explained. -"We even accepted that you form your own Clan"-

Naruto was surprised. -"Really?"-

-"Yes"- It was Falbium who answered him. -"The truth is that we wanted to offer it to you after the Civil War"-

Zekram looked at Naruto. -"So what do you say, Naruto-dono?"-

All the Demons got excited to hear Naruto's answer.

-"Thank you for the offer, but I'll have to decline"-

Naruto answered them calmly, causing the Demons to be surprised by his answer.

-"Oh"- Zekram didn't seem to like his answer. -"May I ask the reason?"-

-"It's because I'm currently the leader of a Faction"-

All the Demons gasped in surprise upon hearing that.

-"Are you the leader of your own Faction?"-

Sirzechs asked surprised at not knowing that.

-"Yes. I created it after the Civil War ended and we are currently a very advanced Faction"- Naruto said proudly. -"And we even have an alliance with the Celtic-Irish Pantheon and the Nordic Pantheon"-

The Demons looked at him surprised to hear that.

-"Wait"- Ajuka spoke. -"You are the famous God Slayer?"-

-"Huh?, yes"- Naruto was embarrassed. -"That's what they call me"-

Sirzechs then looked at Serafall with suspicion. -"Did you know that?"-

Serafall smiled nervously. -"Uh yeah, hehehehehe"-

The Maou shook their heads at that while Naruto just laughed.

Zekram groaned internally upon hearing that new information. He had long planned for Naruto to join as a power boost for the Demon Faction; but then he thought he could take advantage of this; After all, it would be favorable to have an alliance with a faction with a powerful leader and alliances with two powerful Pantheons.

Zekram then watched Naruto's eldest children socialize with Sirzechs' son.

He smiled internally as a plan occurred to him.

-"Congratulations, Naruto-dono. I didn't know you had founded a faction."-Zekram smiled. -"So how would you feel about an alliance between the two factions?"-

-"That would be fine."-Naruto agreed. -"I have no objection."-

Zekram internally widened his smile. -"Excellent. We could make an alliance by marriage. Maybe one of your children with-"-

-"No."-

Naruto interrupted him seriously.

Zekram was surprised. -"What?"-

-"As you heard, I'm not going to bind my children to a forced marriage."-Naruto said seriously, then got angry. -"What kind of father would do that to his son?"-

What he never noticed was that many Demons swallowed nervously upon hearing that.

-"I have no problem having an alliance with the Demonic Faction"- Naruto clarified. -"But no arranged marriages"-

Zekram cursed internally. Looks like he'll have to think of something else.

-"Now if you'll excuse me, I want to talk to some old friends"-

Naruto told him calmly, then walked away with Serafall; who wanted to introduce him to someone.

-"Yes, of course"-

Zekram with a forced smile, then he walked away with some unhappy Demons.

Ajuka then smiled. -"Did you see that?"-

-"Yes"- Sirzechs let out a small laugh. -"Naruto totally embarrassed Zekram"-

Falbium also smiled. -"Only Naruto can do something like that"-

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-"I can't believe it"- Rias muttered in shock. -"He's real"-

-"There has to be a trick"- A young girl said believing it. -"This can't be real"-

She is a young woman with glasses and a slender figure, black hair styled in a short bob cut and violet eyes. She was wearing a beautiful violet party dress.

She is Sona Sitri, the next heiress of the Sitri Clan, and younger sister of the Maou Leviathan, Serafall Leviathan.

Currently Rias Gremory, along with her Peerage, were at the table where the members of the Sitri Clan were, as well as their Peerages.

-"I told you he was real"- A woman said with a smug smile. -"But you didn't believe me"-

The woman had the beauty of a serious woman, plus she wore a pair of glasses that made her look even more serious, with short black hair and a pair of violet eyes.

This person is Sara Sitri, the current Lady of the Sitri Clan.

-"But it's impossible; it's supposed to be a myth"- Sona said, still not believing it. -"The story of the Sun of the Underworld is just a children's tale"-

-"Now you can see that it's real"- Sara said with a smile, causing her daughter to groan in frustration. -"And now that I think about it, you loved that story"-

-"I was a child at that time!"-

Sona said with a blush of embarrassment. Her mother laughed at her reaction.

-"Yes, a girl who dreamed of meeting her Hero"-

A man said with a smile, as he looked at his embarrassed daughter. He is a black-haired man. He is extremely skinny and tall; his skin was pale and his features were sharp.

This person is Sebastian Sitri, the current Lord of the Sitri Clan.

-"Who would say that the Sun of the Underworld was real"-

A young boy said in surprise. He is a handsome young man with short blonde hair, blue eyes, and a mole under his left eye.

This boy is Yuuto Kiba, a Reincarnated Devil, and the [Knight] of Rias' Peerage.

-"Yes; but he is very handsome"- A young girl said with a flirtatious smile. -"Don't you think so, Buchou?"-

She is a beautiful young woman with a voluptuous figure, very long black hair, and violet eyes. Her hair is usually tied in a long ponytail, which reaches down to her legs with two strands sticking out from the top and leaning back, with an orange ribbon holding it in place.

This is Akeno Himejima, a Reincarnated Devil and the [Queen] of Rias' Peerage.

-"Akeno!"- Rias was surprised by her friend's boldness. -"Don't say something like that about the Hero of the Underworld!"-

-"Huh?"- Akeno gave him a mischievous smile. -"Doesn't Buchou think the same?"-

Rias blushed upon hearing this.

-"E-Eh, w-well, yes"- Rias stuttered embarrassed. -"But you know what I mean"-

Before they could continue talking, a scream was heard.

-"So-tan!"-

Serafall screamed, then hugged Sona possessively.

-"Onee-sama!"-

Sona screamed surprised and embarrassed by the hug.

Then she noticed that while she was being hugged by her sister, her parents were talking to Naruto.

-"So-tan, I want you to meet someone!"- Serafall said with a smile, then dragged Sona towards her parents and Naruto. -"Naru-kun, meet my cute sister Sona-chan!"-

She pushed Sona in front of Naruto.

-"Oh, it's a pleasure"- Naruto smiled at her. -"Sera-chan has told me a lot about you"-

-"Y-Yes"- Sona said nervously as she stood in front of a legend. -"It's nice to meet you too, Naruto-sama"-

-"Please, just call me Naruto"-

Naruto told her with a smile, then looked closely at Sona.

Sona got nervous and blushed under Naruto's attentive gaze.

Naruto smiled after looking for a few seconds. -"Sera-chan is right; you are cute"-

-"Huh!?"-

Sona shouted surprised and blushed a lot.

-(I knew it)- Serafall thought with a smile. -(No one can resist Naru-kun's charms)-

-"Oh?"- Sebastian became serious. -"Are you making advances on my daughter?"-

-"What!?"-

Naruto shouted surprised as Sona blushed even more.

-"Why if that's the case..."- Sebastian looked seriously at Naruto for a second, then smiled and gave a thumbs up. -"You have my complete blessing!"-

Naruto was surprised. -"Huh!?"-

-"Otō-sama!"-

Sona screamed surprised and embarrassed by what her father said.

-"Oh"- Sara smiled. -"You also have my blessing"-

-"Okā-sama, you too!?"-

Serafall quickly got her family's attention with a fake cough.

Sona smiled at her sister's intervention; she knew that her sister would never allow someone to marry her.

Serafall looked seriously at everyone. -"... I..."- Then she put on a big smile. -"I accept! I know that Naru-kun will be a good husband for So-tan!"-

Sona went into shock. -"What!?"-

And she wasn't the only one surprised, as all the Devils in the surroundings were also surprised.

-"Onee-sama!"- Sona shouted at her embarrassed and surprised as she approached her. -"You can't be serious!"-

-"Imagine, So-tan! Both of us married to the same man!"- Serafall fantasized with a blush. -"All the things we could do!"-

Sona blushed massively. -"What!?"-

Naruto just looked confused at the intention of the two sisters, then felt someone pulling his coat. When he looked at who it was, he could see a small girl with white hair and golden eyes. The front of her hair has two long bangs that pass by her shoulders and several loose bangs that hang over her forehead, while the back has a short bob cut. She also wears a black cat-shaped hair clip on both sides of her hair.

This girl was Koneko Toujou, a Reincarnated Devil and Rias's [Tower] of Peerage.

Naruto upon seeing her and sensing natural energy within her, quickly assumed that she is a Yõkai.

-"Hmmm"- Naruto looked at the little girl curiously. -"Yes?"-

-"Are you a Yõkai?"-

Koneko asked him expressionlessly.

Naruto raised an eyebrow at the sudden question. -"No. Why do you ask?"-

Koneko didn't change her expression. -"Because you have natural energy."-

-"Ah, that."- Naruto smiled in understanding. -"It's because I'm able to use [Senjutsu]."-

What Naruto said caused Koneko to open her eyes in horror for a second, then lower her gaze darkly.

-"[Senjutsu] is dangerous."-

Naruto was surprised to hear it. Then he looked at Koneko seriously.

-"I'm not going to lie to you, [Senjutsu] is dangerous."-

Koneko just looked at Naruto expressionlessly.

-"But when you use it for the first time you feel something indescribable; something beautiful."- Naruto then smiled. -"Something that only Mother Nature herself can give you."-

Koneko blinked in confusion.

-"And what I know is that [Senjutsu] is neither good nor bad. It is neutral and only the user decides how they will use it."- Naruto explained with a smile, then looked Koneko straight in the eyes. -"Just by looking at your eyes I can see that you had a bad experience with [Senjutsu]. But don't let that give you the wrong idea. [Senjutsu] is something beautiful and powerful; but easy to corrupt."-

Then he placed his hand on Koneko's head.

Koneko was surprised by the sudden contact. She couldn't help but feel the warmth in Naruto's touch.

Koneko unconsciously closed her eyes; enjoying the sensation. Without realizing it she released her cat ears and tails.

-"Oh, I didn't expect that"-

Naruto said a little surprised, then continued petting Koneko, who seemed not to complain, as she was purring. Not knowing that Rias and her Peerage were watching the scene in shock at how Koneko acted.

But a sudden scream interrupted the party; as it would also cause the Devils to sweat in fear.

-"What are you dirty Humans doing here!?"-

Naruto suddenly stopped petting Koneko, then lowered his gaze in a somber manner and headed towards the place of the scream.

Because he knew something...

And it was that the place was where his eldest children were talking to Sirzechs' son.

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-"-And then Otō-san took the Dragon's tail to lift it up and hit it against the ground"-

Sasuke smiled, as he told a child something about "Training the Village Dragons".

The boy has short crimson hair and red eyes.

This boy is Millicas Gremory, son of Sirzechs Lucifer and Grayfia Lucifuge.

Millicas was fascinated. -"Wow, that's amazing!"-

-"And that's nothing"- Akane smiled. -"Otō-sama has done many amazing things"-

-"Yes"- Harry also smiled, agreeing. -"Like when he fought against the Evil God Balor or when he stopped the Great War of Yggdrasil"-

Millicas was surprised. -"Naruto-sama is amazing"-

But before they could continue talking, a sudden shout was heard behind them.

-"What are you dirty Humans doing here!?"-

The children looked towards the direction of the voice, to see a tall and handsome young man in his early twenties, with short blond hair and dark blue eyes.

This person is Riser Phenex, the third son of the Phenex Clan.

Millicas looked on with concern, while Harry and Akane looked on with seriousness.

Only Sasuke was the only one who got angry at the comment. -"What did you call us!?"-

Riser smiled arrogantly. -"As you heard, brat."-

The Devils began to approach, looking at the scene with different reactions.

The younger ones looked on with a smile, while the adults looked on with concern.

-"I can't believe that they didn't just bring some random Human to act as the Sun of the Underworld, but also brought their brats and their bitches."-

Riser said arrogantly, causing the young Devils to laugh and the adults to gasp in horror.

At that comment, Harry lost his patience.

-"Take it back..."-

Harry said seriously, as he stood in front of Riser.

-"Oh?"- Riser scoffed. -"What if I don't?"-

-"Then I'll force you to do it"-

Harry replied, then slowly raised his right arm towards Riser. But before he could do anything, a voice stopped him.

-"That's enough, Harry"-

Naruto stopped him seriously as he reached the spot.

Harry didn't look away from Riser.

-"Otō-san, he-"- .

-"I know what he said, and believe me, I'm very angry"- Naruto told him seriously. -"But remember, we are Ninjas; and we must control our emotions"-

Harry growled then lowered his arm and looked away from Riser.

-"You must be Riser Phenex"-

Naruto said calmly, drawing Riser's attention.

Before Riser could respond, Naruto continued speaking.

-"I know your parents; great people. Although..."- Naruto smiled. -"Your father was a little arrogant at first"-

Among the crowd, a blond Demon laughed nervously upon hearing that.

-"I also met your older brother, Ruval. A good person, and one of the strongest Demons I've ever met"-

Riser didn't know where Naruto was going with this.

-"The Phenex Clan is a very famous and prestigious clan; where its members did incredible things"- Naruto said with a smile, then looked at Riser seriously. -"What I mean is, I hope you don't ruin your Clan, Riser"-

Then he walked away from the place with his children.

Riser, angry at Naruto's comment, tried to say something; but a voice interrupted him behind him.

-"Riser..."-

Riser turned pale upon recognizing the voice, then looked behind him in fear. He could see a middle-aged man, with short blond hair and dark blue eyes.

This person is the current Lord Phenex and Riser's father.

His father looked at him seriously. -"We need to talk"-

Riser sweated nervously for some reason.

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-"I'm sorry, Naruto"- Sirzechs apologized embarrassed. -"I'm really embarrassed by the attitude of one of our young Devils"-

-"Calm down, Sirzechs"- Naruto smiled at him. -"It wasn't your fault"-

When Naruto walked away from the place with his children, they ran into Sirzechs, along with Grayfia and the Lord and Lady of the Gremory Clan.

-"That Riser has always had that attitude"- Venelana Gremory, the current Lady of the Gremory Clan, said with a frown. -"Just for being a High-Class Devil"-

Venelana looks a lot like her daughter Rias, with her shorter brown hair and violet eyes.

-"Sometimes I regret making a marriage contract with him and Rias"-

Zeoticus Gremory, the current Lord of the Gremory Clan, said with a sigh.

Zeoticus has the appearance of a handsome middle-aged man with long crimson hair tied in a loose ponytail with a black headband. He has bright blue eyes like his two sons. He also has a short red beard or stubble.

Naruto raised an eyebrow upon hearing that. -"Rias is engaged to that boy?"-

-"Yes, and I knew it was a bad idea from the start"-

Sirzechs replied as he sent a glance to his father.

Naruto knew he thought about that for a few seconds, then put it aside.

-"Well, that boy is lucky he showed up"- Naruto clarified with a smile. -"Otherwise Harry would have kicked his ass"-

Sirzechs smiled at him. -"Oh yeah?"-

-"Of course"- Naruto confirmed proudly. -"After all Harry is one of the strongest wizards in the Faction"-

Harry blushed slightly in embarrassment upon hearing that.

-"And Sasuke and Akane aren't far behind either"- Naruto said with a smile, earning a laugh from Sirzechs and Zeoticus as they saw how he showed off his children. -"They started training, and they're very talented"-

Venelana worried. -"Is it okay to train at such a young age?"-

-"I understand your concern. Me and the girls didn't want them to train at such a young age either"- Naruto looked at his children with a smile. -"But they were very insistent on wanting to train"-

-"I want to be as strong as Otō-san!"-

Sasuke clarified happily.

-"I don't want to be left behind either"-

Akane clarified calmly.

The adults laughed at the children's attitude.

Zeoticus smiled. -"I bet they'll be very strong if they start training from the age of four"-

The children looked at each other, then looked at Zeoticus.

-"Sir, we're two years old"-

Akane told him while Sasuke nodded.

The Gremory family opened their eyes in shock, then looked at Naruto for answers.

-"Believe it or not, it's true. For some reason unknown to me, they grow and develop faster"- Naruto said calmly, then suddenly started crying. -"My children grow so fast!"-

Harry patted his back in an attempt to calm him down.

The Gremory families just blinked in surprise and confusion.

........

......

....

....

A few hours had passed and the party was already over; many guests had already started to leave.

At that moment, Naruto was talking to his Maou friends. Falbium and Ajuka didn't know when they started talking about their siblings.

-"I assure you, Sirzechs"- Naruto smiled at him. -"Naruko-chan is one of the strongest Ninjas of her generation"-

-"Well, Rias-chan is very strong and has great control of the [Power of Destruction]"-

Sirzechs declared with a proud smile for his sister.

Serafall smiled at them. -"Well Sona-chan is very talented in magic, and a great strategist"-

-"Um, this gives me an idea"- Naruto said with a smile, while receiving curious looks from the Maou. -"How about we do a tournament?"-

Sirzechs became curious. -"A tournament?"-

-"Yes"- Naruto nodded. -"The new generation of Demons against the new generation of Ninjas"-

-"That... It's actually a great idea"-

Ajuka said that after thinking about it for a few seconds.

Serafall also agreed. -"Yes. It can also help a lot in the relations between the two factions"-

Naruto smiled at them. -"So we do it?"-

-"We would have to talk to the council; but I'm sure they will accept"-

Falbium said with a smile while the other Maou nodded.

-"Absolutely"- Zekram said with a smile, as he approached the group. He couldn't help but overhear the conversation and the idea of ​​the tournament. -"I think I speak for the entire council that such a tournament will happen"-

The Maou weren't surprised to hear. After all, if Zekram supported it, more than half of the council would support it.

-"Well"- Naruto smiled at Zekram. -"And why don't we make it more interesting with a little bet?"-

-"A bet?"-

Falbium asked curiously.

-"Yes; a friendly bet"- Naruto explained. -"The winning faction will ask something from the losing faction"-

-"Interesting; we accept it"-

Zekram accepted it with a smile, without even asking the Maou. He was already planning to turn this to his advantage.

While the Maou couldn't help but think that Naruto was planning something.

-"Excellent!"- Naruto smiled enormously. -"And as a sign of good faith, the tournament will be held at Yōsogakure No Sato; if there is no problem"-

-"Not at all"-

Zekram answered him, then shook hands with him.

Some would say that it is risky to bet with a Devil; but that did not worry Naruto.

After all...

Zekram was also betting with a Devil.

........

........

....

....

After an hour, the party was over; and the Uzumaki family was already about to leave. Now they were saying goodbye to everyone. Although Serafall said goodbye to Naruto with a kiss on the lips; which only surprised the youngest.

-"I've been waiting a long time to do that..."-

Serafall told him with a smile and a big blush.

-"I-I see..."-

Naruto said surprised and blushed, while the adult Devils and Naruto's wives laughed.

Naruto then discreetly activated his [Rinne-Sharingan] and opened a portal for him and his family to return to Yōsogakure No Sato.

With the idea of ​​creating a tournament in the future...

.......

......

.....

....

Rias was about to go to sleep, after a birthday party full of surprises. She was about to take off her clothes to sleep; because according to her, she can't sleep without being naked. But she stopped when she noticed a birthday present that she didn't open.

Being Naruto's present...

Rias grabbed it and started to open it, to look at a jewelry box. When she opened it, she gasped in shock when she saw what was inside.

A beautiful necklace with a chain made of pure gold, along with a beautiful shiny ruby.

Rias as the heiress of a prestigious Gremory Clan, expensive jewelry wasn't a problem for her; but she could feel that this necklace was very different; as if there was some mystery inside it.

Rias smiled softly, then went to sleep naked; only wearing the necklace that Naruto gave her.

TO BE CONTINUED!!!

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Author's Notes

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Shodai Yōsokage (初代要素影) Literally means: First Shadow of the Elements.

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Upcoming chapters (Spoilers):

Special Short No. 4- The Origin of the Greek Pantheon

Chapter 20- Rescuing a Nun

Chapter 21- Preparing for Harry's Tournament and Birthday