Peng!
A figure slammed into the cliffside with a thunderous crash.
"Dammit… Naruto shouldn't have pushed so far with the Nine-Tails' chakra this early."
Jiraiya gritted his teeth, blood trickling from the corner of his mouth. He had only intended to guide Naruto to better control the Kyūbi's chakra, hoping he could master the initial cloaked states.
But Naruto had suddenly erupted—his skin peeling, his form engulfed in bubbling red chakra—and by the time the Fourth Tail surfaced, the boy had lost all sense of self.
The result? Several broken ribs, internal bleeding, and Jiraiya barely clinging to consciousness.
"Naruto's about to wake up…" Jiraiya's voice trembled as he forced his battered body upright. He had to suppress Naruto before the transformation escalated further.
Within the sealed space of Naruto's mind, he was submerged in the familiar ominous water.
Kyūbi's chakra surged violently, seeping from the gaps in the seal.
"Give in to your hatred, brat. That's it… more!"
The Nine-Tails grinned viciously, watching as Naruto's remaining consciousness flickered.
The seal was weakening. If he could pour enough chakra into Naruto's psyche, the seal—Minato's Four Symbols Seal—would snap.
Kyūbi began funneling his own malicious consciousness into Naruto's core, whispering madness into the cracks of the boy's mind.
Suddenly, another will—alien and vast—slammed into Naruto's spiritual plane like a tsunami.
Naruto's original consciousness was obliterated, replaced by something foreign and… awake.
The Kyūbi froze.
"What? This isn't Uzumaki Naruto! Who are you?!"
For the first time in decades, true fear crept into the beast's voice.
He tried to retract his presence—but failed.
The foreign soul had locked him in.
Naruto opened his eyes slowly, blinking through the reddish mist.
"Why the hell am I underwater?" he muttered, dazed.
The boy wasn't the Naruto everyone knew. He was someone from another world—Blue Star, a parallel modern Earth.
A flood of Naruto's memories crashed into the foreign soul's mind—the academy, Team 7, the Chūnin Exams, the battle with Sasuke at the Valley of the End—all assimilated in an instant.
"This… this is real? Did I transmigrate?"
"And into Uzumaki Naruto, no less?"
He shivered with excitement. This was the chance of a lifetime—to live as the destined hero of this world.
"No. Not the same Naruto. From now on, I am Uzumaki Naruto, but not the fool everyone remembers."
The boy clenched his fists. This was the beginning of his reign.
He had knowledge the original Naruto never had—and the future to reshape.
Meanwhile, Kyūbi struggled, trapped in place.
"Who the hell are you, kid?! Why can't I pull away?!"
The new Naruto's eyes widened.
Right. This isn't a dream. I'm still in the seal.
From the memories, he realized the timing—it was shortly before Shippuden began. Jiraiya had taken Naruto into the wilderness to train, and this incident—the four-tailed transformation—was Naruto's first real brush with losing control to the Kyūbi.
What a hellish moment to arrive.
But without it, he never would've been sent here.
He smirked.
Blessings and curses come hand in hand.
Still, he had to act fast—or he'd be consumed.
Kyūbi's chakra was pure chaos, and it would soon overwhelm his borrowed consciousness.
"Answer me, damn it!"
Kyūbi roared, its tails lashing wildly in the mental space.
"Why is my consciousness being swallowed?!"
The boy faltered.
Wait—he was consuming Kyūbi's consciousness?
He could feel it now—an unfamiliar power flooding his essence.
Demonic, yes—but it was also Kyūbi's very being.
Somehow, his soul had displaced Naruto's, and now it was pushing back against even the Nine-Tails.
He grinned.
If he kept absorbing Kyūbi's awareness, he could gain more than just chakra—
He could gain dominion.
Kyūbi roared again, chakra bursting outward, tearing into the surroundings of Naruto's body.
Outside, Jiraiya stared in horror as the crimson shroud grew.
The chakra tails had already reached five, and with the appearance of the sixth, a skeletal exoskeleton began forming.
"No… this is worse than before!"
Jiraiya clutched his chest, coughing blood.
"Seven tails… if he goes beyond that—no, even if it kills me, I have to stop him here!"
He slammed his hands together.
"Earth Style: Swamp of the Underworld!"
The ground under Naruto turned into a churning quagmire, dragging his rampaging form down.
Back in the sealed space—
"Mark my words—I won't let this go!"
Kyūbi's voice thundered.
He didn't know who had hijacked Naruto's body, but never had he been more furious.
To be overtaken like this—this was worse than even Uchiha Madara's manipulation.
Still, Kyūbi wasn't done.
This wasn't his full self—only the yang half, sealed into Naruto.
He would return.
He would reclaim his will.
But for now, the beast's consciousness was consumed—gone.
And as the new Naruto rose, his mind now entwined with Kyūbi's chakra, something terrifying bloomed.
He could now feel both his own thoughts and Kyūbi's essence—as if fused.
"Hahaha!!"
He laughed like a storm breaking across the valley.
"This is the perfect beginning!"
"I'll shake the Shinobi World to its core!"
And with half of Kyūbi's soul under his control, he could now wield all of its terrifying might.