Byakugan and Body Tempering

The moon hung in the empty sky. Naruto dragged his battered body into the small shack he had lived in for five years, collapsed onto the worn-out bed he had slept in for five years, and stared coldly at the dilapidated furniture surrounding him.

Naruto touched the red mark on his forehead. His mind drifted back five years to when his parents, in order to save him, sealed the Nine-Tails into his body and died right before his eyes. For two consecutive lifetimes, he had been forced to watch his own parents perish while he remained utterly powerless.

The resentment in Naruto's heart had reached its limit. This deep-seated bitterness and hatred served as the perfect catalyst to awaken the Byakugan on his forehead. At that moment, Naruto felt a surge of power rush straight to his brain, and he suddenly realized he could see everything around him with absolute clarity.

Though he did not understand how it happened, his chaotic heart and turbulent emotions miraculously calmed down.

Naruto knew the Byakugan had awakened. He could also clearly perceive that the red mark on his forehead was actually a soul inherited from Otsutsuki Koshiki.

At the same time, it made Naruto realize clearly that this was the world of Naruto, a world of ninjas. Here, there was immense power and incredible ninjutsu. In his previous life, because his girlfriend loved watching anime and insisted he watch with her, Naruto knew full well that this ninja world possessed ninjutsu capable of bringing the dead back to life—the "Samsara of Heavenly Life Technique."

At this point, Naruto had completely calmed down. He remembered that after the original Naruto persuaded Nagato, it was Nagato who used the "Samsara of Heavenly Life Technique" to revive all the Konoha ninjas who had fallen in battle.

Looking at the lifeless bodies of Minato and Kushina before him, Naruto thought that to resurrect his parents, he would need complete corpses, their souls, and the Rinnegan.

The Rinnegan and the souls were out of the question for now. The Rinnegan required the Uchiha Clan's Sharingan and the cells of Hashirama Senju—in other words, the union of Asura and Indra, which meant himself and Sasuke Uchiha.

As for the souls, his mother's was simple; it could be summoned using the "Impure World Reincarnation Jutsu." His father's soul, however, would require undoing the "Dead Demon Consuming Seal" first, which was also currently impossible.

But the bodies could not wait. Through his Byakugan, he could see that the Third Hokage, Hiruzen Sarutobi, was already approaching. He had to find a way to preserve Minato and Kushina.

Naruto frantically searched the fragments of memory regarding Otsutsuki Koshiki in his mind. The memories were far too numerous and disorganized, but after a long search, he found a solution that was a desperate measure: using the chakra emitted by the Nine-Tails within him.

The Nine-Tails was a mass of chakra. Even though it had just been sealed into Naruto, it caused his body to immediately possess Nine-Tails chakra. Because Naruto was Kushina's son, he had been constantly exposed to the Nine-Tails' chakra while in the womb, so his body was already accustomed to it.

Furthermore, the Byakugan's control over chakra was nothing short of insane. What Naruto needed to do now was to unlock the bloodline limit of the Uzumaki Clan.

Just as he awakened the Byakugan, he had already become aware of his physical state; the chain-like manifestation of his blood was the bloodline limit of the Uzumaki Clan.

Naruto frantically channeled the Nine-Tails chakra radiating within him, fusing it with his blood to force the chains out of his body.

This process nearly caused Naruto's newborn body to collapse. Fortunately, the Nine-Tails within him realized it early and cooperated desperately to help Naruto control its chakra, or he would have died long ago.

While cooperating with Naruto to control the chakra, the Nine-Tails couldn't help but curse: "Damn it, Fourth Hokage Minato Namikaze, I'm not finished with you! Sealing me into this brat is one thing."

"Damn it, this brat is a freak! He's not even a day old and he dares to mobilize my chakra, and he even has the Hyuga Clan's Byakugan. That's not even the worst part—he's actually using my chakra with a specific goal in mind. Looking at this, he's trying to activate the Uzumaki Clan's bloodline limit. What kind of intelligence is this?"

"He's a damn monster! And the pathetic part is I have to cooperate with him, otherwise if he dies, I'll be buried with him. Sob... I can't go on like this, there's no human rights left!"

With the Nine-Tails' cooperation, Naruto finally released his bloodline limit. Several blue chains with a hint of light green extended from Naruto's body, rapidly wrapping around the bodies of Kushina and Minato, encasing them.

At the same time, Naruto's Byakugan emitted a dazzling white light that shone upon Kushina and Minato, and then their bodies vanished into the white light.

At this moment, the Nine-Tails inside Naruto was completely dumbfounded. It muttered to itself: "This Byakugan actually possesses its own independent space."

In truth, when Naruto learned from those memory fragments of Otsutsuki Koshiki that the Byakugan contained a small, independent space, he had been shocked, but that shock quickly turned into joy.

Because this space was inside the Byakugan, and Naruto's chains had to be connected to his body, this space allowed him to hide Kushina and Minato's bodies without being discovered, while using the life force and sealing power of the chains to prevent them from decaying.

After storing the bodies of Kushina and Minato, Naruto realized the barrier Kushina had set up had broken; her chakra was exhausted. The Third Hokage arrived at Naruto's side in an instant and picked him up.

The Third scanned the surroundings, failing to find the corpses of Kushina and Minato, and muttered: "Could it be that the white light from just now took their bodies away? What exactly was that white light? I have never seen it before."

Subsequently, the Third issued an order to all the ninjas in the vicinity: no one was to mention Naruto's identity or the fact that he was the Nine-Tails Jinchuriki.

Looking at the Naruto in his arms, the Third smiled kindly: "Be a good boy, Naruto. Grandpa will raise you to adulthood and let you inherit your father's will."

Naruto smiled back at the Third. The Third was slightly taken aback, then smiled as well.

Just then, an annoying voice rang out: "Third, I hope you will hand this child over to me to raise." The Third looked at Danzo, who was walking over, and said: "Impossible. I know what you are planning, but Naruto is the Fourth's child. I will not let you turn him into a machine. Give up on that thought, Danzo." With that, the Third walked away, holding Naruto.

Seeing that the Third did not give him any face, Danzo felt very displeased. He said viciously: "I will make you regret this. A Jinchuriki does not need something like emotions. I will prove that you are wrong."

After Naruto was taken home by the Third to be raised, news spread through the village within a few days that Uzumaki Naruto was the Nine-Tails Fox. Although the Third issued a gag order in time, the news had already spread, and even if people didn't speak of it, they would vent all their resentment onto Naruto.

Because those who had lost loved ones needed an outlet for their anger. They wouldn't bother to investigate the conspiracies behind the incident; they simply wanted a target to vent on. Even if it weren't Naruto, if it were someone else, the result would be the same. This was the inherent ugliness of human nature.

Naruto understood this human flaw all too well. Having experienced the ups and downs of two previous lifetimes, he had grown indifferent to the warmth and coldness of human relationships and would no longer feel the slightest agitation.

What Naruto craved most now was power. Therefore, at the age of three, he proposed to the Third that he live alone. The Third was initially reluctant, but after Naruto's persistent pestering, he agreed to Naruto's request, providing him with a monthly living allowance and a small shack.

On the second day after Naruto moved into the shack, he found a large hole smashed into his roof. When he went out, people stared at him with the eyes one would use for a monster. The children threw stones at him, and when he went to buy food and clothes, he was cheated; not only was it twice the price, but the food was expired, and the clothes were outdated junk.

Naruto had thought about slaughtering these people, but he knew clearly that he could not act rashly; Danzo was still watching him.

After obtaining the method for refining chakra from the Third, he spent every day hiding at home refining chakra, then using that chakra to stimulate every cell in his body. His life experience from his previous two lives told him that to have powerful strength, one must have a strong body. Once he had a sufficiently powerful body, even the Nine-Tails' chakra wouldn't be able to harm him in the slightest.

In addition to using chakra to stimulate his cells, he also insisted on 15 minutes of stillness every day to sense natural chakra, along with a 20-kilometer weighted run.

To sustain the intense daily consumption, he had to go to the forest behind the Hokage Rock to find food, fighting against the venomous snakes and wild beasts in the forest every day. He couldn't use his bloodline limit because the Third was spying on him.

Therefore, he could only use the most basic taijutsu and the simplest ninjutsu (given by the Third) to fight them. Every day, he would return to this cold, small shack covered in wounds, silently licking them.

But he also knew that fighting these venomous snakes and wild beasts made his combat techniques and adaptability stronger and stronger; this was the experience he had brought from his first life. At the same time, he was pleasantly surprised to find that every time he was injured, the healing from the Nine-Tails' chakra made his body stronger, and he became more accustomed to the Nine-Tails' chakra.

Thus, he went to the back mountain every day, tireless and undeterred. He persisted like this for five long years.

Naruto touched the red mark on his forehead, feeling the presence of his parents. Reflecting on everything that had happened over these five years, his heart grew increasingly calm as he thought about the matter of the Rinnegan.

In this world, only Nagato Uzumaki possessed the Rinnegan, but the difficulty of persuading him to perform the "Samsara of Heavenly Life Technique" was simply too high. I am not the original Naruto Uzumaki with the strongest "Talk-no-Jutsu" and the protagonist's halo; I can't pull that off.

After dismissing this idea, he thought about stealing his Rinnegan, but upon reflection, that didn't seem reliable either. Not to mention the compatibility, if the masked man found out, he would surely lead all members of the Akatsuki Organization to hunt him down. Although he wasn't afraid, it would be a massive headache.

He then thought about stealing Sasuke's, but decided against it. Not to mention whether he could steal it, he actually had a good impression of him; at least he was a man who took responsibility for his actions. Besides, if Mom knew I stole Sasuke's Rinnegan, I'd be beaten to death. (Kushina and Mikoto were best friends and partners-in-crime.)

Naruto couldn't think of any good solution by the end, but he did think of the most dangerous method, as failure could potentially lead to a miserable death. But if he succeeded, he could obtain the most suitable Rinnegan.

Looking at the bright moon outside the window, Naruto recalled what Kushina had said to him on her deathbed. He revealed a confident smile and muttered: "Two more years."