I don't own either Naruto or One Piece

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It had been exactly a two hundred and eight years since the Fourth Great Shinobi War had ended. Naruto with help from Sasuke had managed to seal Kaguya. When all had seemed good and dandy, Sasuke had dropped a verbal bomb on them. He had announced his intention to kill all the five Kages and bring about his own revolution in the world and bring about his own twisted idea of peace. To do this he sealed all the freed tailed beasts within Chibaku Tensei intending to use their power to end Infinite Tsukuyomi after he killed Naruto. He demanded Naruto fight him to death; a demand which Naruto complied to happily. They fought for one whole day and night after which Naruto managed to defeat Sasuke and managed to beat some sense into him.

But the battle with Kaguya Ōtsutsuki had taken much out of Sasuke and on his deathbed he asked Naruto to use his eye to end the Infinite Tsukuyomi that had been cast. Nearing his death, Sasuke had managed to redeem himself if only just by an inch. He apologized to Naruto for killing 'them' but Naruto didn't accept it. How could he? He had his loved ones and expected him to forgive him just because he said a few words.

Naruto had implanted the Rinnegan with the help of Kakashi after his fight with Sasuke. Sakura was in pieces after hearing about his death. The Rinnegan of Sasuke was different from the one Naruto had achieved during his teen years. This Rinnegan had six tomoe split between its first two ripples. From what Naruto had gathered from his fight with Sasuke, the tomoe would disappear if Sasuke overused his Rinnegan, preventing him from using its full power until it had fully recharged, something that took a very long time. Sasuke was still able to use the powers of his Mangekyō Sharingan with his Rinnegan, but apparently couldn't use them or even form the Mangekyō in his other eye when it was recharging.

After a century of living like a hermit, Naruto had forgiven him if only just to end the cycle of reincarnation of Asura and Indra.

A few years down the road, he had managed to deactivate Sasuke's Rinnegan with the help of Fuinjutsu. Naruto now had to live with a two different colored eyes. One vibrant blue and the other coal black.

After the war had ended Naruto had become Hokage after Kakashi. His reign was the longest spanning over sixty four years. During his lifetime all of his friends had passed away. After their death, he took no wife, held no lands nor fathered any children. Many of his friends had died of old age and lived happy lives

Towards the end of his term or rather the reason for the end of his term was an incident that had shook Naruto's faith in the shinobi world. After Killer Bee had died, Kumo sealed Gyuki again within Kohaku no Jōhei which went against what they had promised after the end of war, all the nations had vowed to not seal any Biju within humans unless the Biju were willing. Gyuki had chosen to remain with Bee until his death but after that he was to be freed. To spare Gyuki the wrongful imprisonment, Naruto had resigned as Hokage and went to Kumo to talk Kumo out of it.

It turned out that there was a rebel faction within Kumo that didn't agree with Naruto's ideals and had taken over the village, though that didn't surprise Naruto seeing as Kumo was one of the most militaristic of all the Five great nations. After having a battle with the rebels and emerging victorious Naruto sealed Gyuki within himself which was Hachibi's idea.

Fearing that the other Big and small nations alike would fall to the temptation of power within reach Naruto with the permission of the tailed beasts, sealed them within himself temporarily until a permanent solution could be reached.

The jinchuriki of all the tailed beasts living in Konoha raised many protests from other nations so Naruto chose the life of a wandering hermit, never staying in one place for more than required time.

He had in the vaguest sense of the word had become immortal though he was physically only eighteen years old.

He had gained mastery in Fuinjutsu that was only subpar to his father and his Uzumaki ancestors. He had figured out how to create Hiraishin kunais but was unable to figure out how to leave seals directly onto people or objects permanently.

It was with this Fuinjutsu skills that he had managed to create a dimension seal that allowed him to travel through dimensions not unlike Kaguya Ōtsutsuki. He had found one dimension in which there were no humans...only animals and nature. It was a perfect place to let the Bijus roam free. He let all the Bijus out of his body, even Kurama who reluctantly left him. They all left him a parting gift and that was their chakra. After making him promise that he would come to them if he needed any help they all bid him their farewells.

He had found that he could travel through dimensions using his Hiraishin jutsu. That made him theorize that the dimensions he traveled weren't in different planes of existence but were separated by space. He had grown weary of this world. He wasn't welcome in most parts of the elemental nations as they didn't want to risk the ire of other nations by hosting him.

So he had decided that he would travel to another dimension and spread his message of peace. He had so many dimensions to choose from. One dimension he had went to had normal humans with no chakra networks but they were really advanced. They had tall buildings and some cool four wheeled automatic vehicles. During one of his travel, he had seen a weird creature with disproportionate body and having a white mask where his face found that interesting but the creature disappeared when Naruto wasn't paying attention and he wasn't just going to track it down to satisfy his had also seen people in Black Hakama like dressing walking around all the while being ignored by people. They had some strange energy within them, not unlike chakra but not exactly chakra. He didn't choose this world because the world already seemed at peace.

The next one was a weird world, there people loved with anthropomorphic animals and some lizard like giant creatures. But this works already had a savoir from what he had heard. His name was Hercules Satan and he had saved the world at least twice so Naruto thought that this world didn't need him.

He decided that he would go to the world he had accidentally visited at first when he had first developed this technique twenty years ago.

Flashback

Naruto had just finished drawing his latest seal. The seal had been inspired by Kaguya's Yomotsu Hirasaka technique that allowed her to open rifts in space. He had been working on this seal since he resigned as the Hokage, he was hoping that he would be able to open one rift that would lead to another dimension where he could let Bijus roam free without fear of capture. The seal was pretty big and was not handy, he was hoping to make it compact in future so that he could carry it with himself.

Naruto activated the seal and found himself looking at a beach from above. There was a ship anchored on the beach with a pirate's flag being flown on the crow's nest. A little girl was running away from some men chasing her. She tripped on a stone and fell and soon the men surrounded her.

He could only hear some snippets of what they were saying.

"Look wha-….ou..di-….t-..us you devil chi-.."Said one of the men

"Yes yo-….betr-…. We'll ma-…pay." declared the other man

'I'm sorry I didn't do anything, believe me please don't hurt me." Naruto head the last part crystal clear. This kid was in danger and he would be damned if he let an innocent soul be hurt on his watch. Fueled by emotion, Naruto entered the fray with only one thing on his mind 'protect her'. In his Kurama Chakra Mode, Naruto instantly knocked out the men without being seen.

The girl was scared by this flash. What was that? A golden flash and all the men were down on the ground….and then she saw him. It was as if his whole body was clad in yellow flames and they were flickering of his body. She was in a daze, this man had singlehandedly defeated the entire crew of Chesskippa pirates and hadn't broken a sweat, not that she could see with all him glowing golden. He asked her if she was okay and she nodded. He asked for her name and she again nodded; she was in a daze. This man had an aura if she could call him that was so warm and full of life. She felt that she could live in this glow for her whole life comfortably.

"Hey, I asked what your name was?" he asked her again waving his hands in front of her.

"Robin…Nico Robin." She squeaked, still not sure whether to trust this man. The last time she had trusted a man, Chesskippa and now he was out for her blood.

"I can't stay here any longer, I see the rift closing. Keep this" he said handing her a three pronged stabbing knife of some sort. "My name's Uzumaki Naruto, I don't know if it will work but keep this anyways. Who knows I might be able to come here again. Now stay safe kid and don't get in any trouble." He told her as he ruffled her hair.

-And just like that Naruto went back to his world before the rift closed.

(Flashback end)

He had after a month managed to figure out how to use Hiraishin to travel to different dimensions or rather different dimensions in same space. He remembered the second and the last time he had seen her and then his visits had ended abruptly. He just couldn't sense the kunai anymore.

(Flashback)

He had been still researching on ways to travel through dimensions freely. He could have settled in any one of those dimensions but he always came back to elemental nations. Because that was his home, Gods save him if he didn't visit Shima-baa chan every once in a while there plus he had to ensure that peace remained. He decided that he would pay the girl he saved a visit but first he needed to prepare. He needed at least an hour to locate the Hiraishin kunai he had given her. It was a problem and he hadn't gotten around to fixing it yet.

After locating her, he teleported to her location. He saw her laughing in the rain and sitting on a rock. There was a dog with her and she was laughing in a weird way.

"Dereshishishi! Dereshishishi!" she was laughing wholeheartedly. This was the first time he had seen her happy.

"That's music to my ears Robin-chan"

Looking up, she got embarrassed. She at first didn't recognize him then realization dawned on her. Same wavy blond hair and same voice.

"Yo-you came!" She exclaimed loudly.

"Of course I came… I told you I would figure out how to come here."

The dog looked at him in puzzlement, cocking his head to the right.

"Is that a new friend you got there?" he asked her while looking playfully at the dog.

'Ye-yes I think. He came here to me asking for food….but I don't have any." She said sadly.

Just as she finished saying that her stomach grumbled loudly.

"Well we can't have that now, can we? Wait a second" he said as his hands lit up with blue and red flames. After bringing his hand s together, there a basket of onigiri and sushi in his hands. He had used his Banbutsu Sōzō no Jutsu. An ability granted to him by the Rinnegan. He could create anything by mixing his Yin and Yang chakra. Though he was right now only limited to small things like food or weapons. He couldn't create living things …yet. He had discovered this ability recently.

"Woah, how did you do that? Can you teach it to me?"

"Well, a sage never reveals his secret and no I can't teach it to you as it's a technique only exclusive to me, sorry."

She looked downtrodden at hearing this but soon perked up at the prospect of having something to eat. She gave took the basket from his hand and gave some rice balls to the dog.

She started munching down on the food and later realized that there was no salt in the onigiri.

"Ne….why is there no salt in this?" she asked him with a look that made Naruto uncomfortable.

"Oh crap sorry, I just learned this technique so you'll have to forgive me for this." Naruto said rubbing the back of his head sheepishly.

"So Naruto-san, you said you are a sage but then why don't you look old and wise?" she asked teasingly

"Well…I'm older that you think an-…..hey did you just call me stupid looking" Naruto asked with mock rage

She laughed again at this. He really like listening to her laugh.

"You've got a cute laugh" he said complementing her.

She blushed at hearing this and he found that even cuter.

Seeing that they were getting wet in the rain, Naruto took her aside near the beach and going through some hand seals he created a large wooden house. But the house was crooked and seemed unfinished. The jutsu was called Mokuton: Shichūka no Jutsu;it created a house using his wood release.

Naruto had gained the ability to use Mokuton after he got the Rinnegan. Having Hashirama's chakra in his system was a bonus that allowed him to master the technique to some extent and not be utterly exhausted after using it. He had learned this technique from his Mokuton sensei Yamato.

The girl was really shocked to say, was her savior even a human? Or had he eaten some weird devil fruit? Many questions went through her mind.

"Now you can sleep here without having to worry about getting the cold." He told her.

"Thank you Naruto-san. I can't believe you did this just for me."

"Hey don't worry about it. Now sleep, I have to go back. Keep the kunai with you so I can come here. You see, the kunai acts as a beacon to my technique which allows me to travel to your location. So don't lose it okay because it'll keep you safe."

She just nodded happily.

Then ruffling her hair once again Naruto disappeared in a yellow flash.

(Flashback End)

That world seemed to have problems from what he had seen plus he could use some fun, all the sitting around had made him quite rusty. He had figured a way to differentiate the dimensions using his sensory technique. All the dimensional rifts vibrated at different energy frequency. By identifying the frequency he could identify which was which dimension. He decided to open a rift to the dimension where he had met the girl, he just couldn't remember her name now. He decided that he would search for her and see if she was safe and also try to spread his message of peace while he was at it, after all being the Child of Prophecy meant he had to bring peace to the world he adopted and that was exactly what he was going to do.

Entering the rift, only one thought crossed Naruto's mind.

'A new world, a new beginning."

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Yomotsu Hirasaka – This ability allows user to be able to form rifts within the fabric of space which allows them to instantaneously transport themselves to different locations. They are also capable of transporting sections of their body by partially entering through the portal.

Banbutsu Sōzō no Jutsu - The Creation of All Things Technique was a technique possessed by Hagoromo Ōtsutsuki, who used it to create the nine tailed beasts. The process he used is explained to have initially involved the administration of imagination, and the spiritual energy which forms the basis of Yin chakra to create physical forms from nothingness. Then, through the application of vitality, and the physical energy which forms the basis of Yang chakra, he would breathe life into the resulting creations.

Mokuton: Shichūka no Jutsu - By sending chakra into the ground, the roots of the plants are converted into raw materials. This technique allows for a building to be constructed, by forcing accelerated growth. The size and shape of the house is taken from memories and imagination.

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This story is set in the same universe as my other story One More Day and is set in future after the Fourth Shinobi War. So the powers he exhibits here are the power he will gain in that story later on. Enjoy and please review as reviews are what motivate me to write more. Have a nice day