Naruto: Unifying the Ninja World, Invaded by Naruto’s Team

Their words drowned in the roaring cheers; no one paid attention.

Imperial Naruto surveyed the packed stands.

"Martial warriors seeking muscle truth! Let us radiate the beauty and power of muscles together! Feel the muscle light! Flesh pressure! Synchronization! Rhythm! Haaah!"

As Imperial Naruto finished, his arms spread wide.

His already tall body rapidly grew, exceeding three meters, emitting a golden glow.

The golden light bathed the arena.

Everyone screamed hysterically, their tank tops bursting. Amid flying fabric dust, their muscles swelled further!

Boruto and Future Sasuke felt submerged in a muscle ocean, white, robust muscles filling their vision, dizzying and uncomfortable.

Even they, touched by the light, felt their muscles pulsing. If their clothes were looser, they might've burst like the others!

"What jutsu is this? Feels so weird!" Boruto gasped.

His arms hugged his body, his expression twisted.

Future Sasuke sweated coldly, using his power to suppress the urge, muttering oddities in his mind.

"Hahaha… open your mind, relax your muscles. Only then can muscles perfect! Everyone! Muscle path warriors!

"Listen to my muscle doctrine! Muscles reduce excess and add what's lacking! Thus, the weak defeat the strong, the lesser overcomes the abundant."

"Its meaning is vast, its principles profound, its thrill boundless, heaven and earth divided, yin-yang signs aligned, change's causes clear, life and death's signs evident…"

Imperial Naruto laughed heartily, loudly explaining his muscle martial arts.

His resonant voice echoed through the arena.

His body's muscle pulse frequency shifted, others' muscles followed, pulsing stronger, more perfectly.

Boruto saw Konohamaru, Moegi, and Udon, arms spread fanatically, faces ecstatic, possessed.

"Beautiful! Truly beautiful, is this the Great Muscle Light King Sutra? I feel perfect muscle rhythm!"

"Ah… freedom! Unprecedented freedom aura."

"Jump, my muscles! Jump harder!"

"Ugh! I smell glorious sweat! Is this paradise?"

In the void, illusory muscular men appeared, striking bodybuilding poses.

Some even wrestled, clashing, performing strength battles.

The arena brimmed with awe, hysterical screams, and moans.

Boruto and Future Sasuke, seeing this, felt urges to join but dared not, suppressing it fiercely.

Their faces flushed.

Time passed.

Over ten minutes later, Boruto couldn't hold back, screaming hysterically, tearing his clothes, striking bodybuilding poses with a flushed face.

"Hahaha… beautiful! So beautiful! Muscles are this glorious? Freedom! I feel freedom and joy like never before! Heaven and earth are under my feet! Hahaha…"

"That's it! As Big Brother Naruto's huge fan, that's how it should be!"

Imperial Konohamaru hugged Boruto's shoulder, laughing heartily.

"Trouble! Boruto too… Is this world's Naruto an evil god?"

Future Sasuke pressed his right leg hard with one hand, forcing calm.

Alone, in endless torment, he endured a full half-hour.

Imperial Naruto finished explaining, laughed, bid farewell, and soared into the sky.

Everyone gazed in awe at his receding figure.

Unnoticed, Future Sasuke shed his cloak, covered Boruto, hoisted him, and swiftly leaped across buildings, trailing behind.

Boruto, feeling cold wind, snapped awake. Glancing at his upper body, his face reddened.

"Aaaaaa! How'd this happen! What kind of demon or monster is Dad in this world!"

"I couldn't control myself! Doing such stupid things, so embarrassing! So embarrassing! If Sarada and Mitsuki find out, they'll laugh at me!"

Boruto felt deep shame.

"I'll keep your secret. Now, stay quiet, don't get caught." Future Sasuke said.

"Promise you won't tell them!" Boruto said anxiously.

"Promise." Future Sasuke replied.

Boruto sighed, calming slightly. "Thanks, Uncle Sasuke. But what power did Dad just use in this world? And why can he fly? I don't recall him mastering such a jutsu."

"No idea. This world's too weird; I've no clues."

Future Sasuke shook his head.

About muscle power, he knew nothing.

But flying?

He recalled during the Fourth Ninja World War, Naruto gained Six Paths power and could fly.

But that ability later vanished.

Yet this world's Naruto, muscle-packed, stronger than an ox, could still fly—who knows why?

No chakra ripples… too bizarre.

And now, what was he about to do?

Slightly away from the city center, Imperial Naruto slowed his flight, landing gently.

Future Sasuke raised an eyebrow, carrying Boruto, seeking cover to hide.

But it was useless against Naruto. After landing, he shouted: "Friends, don't hide. Nothing escapes my muscle senses! I feel, though your muscles are weak, they're filled with strong chakra."

"Caught? This world's weird Dad has insanely sharp senses, but what's muscle sensing?" Boruto muttered.

"Uzumaki clan members have strong chakra senses. If this world's Naruto is strong enough, spotting me isn't hard." Future Sasuke said, unconcerned.

In his original world, at this point, he and Naruto had survived the Fourth Ninja World War. Though they lost Six Paths power, they were far stronger than average ninja.

He led Boruto out from hiding.

Seeing them, Imperial Naruto grinned. "You two were following me, right? Keeping up with my speed, your strength's decent. So, what's your business with me?"

"Nothing, just happened to take the same path." Boruto said, eyes darting left and right.

Future Sasuke lightly tapped his head. "Too obvious, idiot."

"Ow! Sorry…" Boruto clutched his head, sulking. "I really don't know what to say to Dad… Big Brother Naruto like this."

"Uzu… Namikaze Naruto, do you trust us?" Future Sasuke stared at Imperial Naruto.

"Of course."

Imperial Naruto smiled.

He felt an odd familiarity from them, akin to his world's Sasuke and the ninja world's Sasuke.

The kid? An odd blood bond.

Perhaps distant relatives. Naturally, Imperial Naruto had a good impression of them.

"Thanks for your trust. I'll be blunt: someone plans to attack you. We're tasked to protect you." Future Sasuke said directly.

Despite the turtle's earlier warning, given the spacetime chaos and this bizarre world, Future Sasuke felt its words were half-trustworthy at best.

Protecting Naruto while hiding their identities seemed optimal.

"Protect me?" Imperial Naruto looked stunned, as if hearing the impossible, pointing at his nose. "You sure you want to protect me?"

"Yes, we know you're strong, but this enemy's unusual. If they succeed, the world's in danger. Please let us protect you." Future Sasuke said, his face serious.

"Please help, Big Brother Naruto!" Boruto clasped his hands, pleading.

"Alright, alright. But can you tell me details about what's happening?" Imperial Naruto, seeing Future Sasuke's earnestness and friendliness, felt unable to refuse, scratching his head and asking.

"It's a classified mission, sorry, we can't share details. But trust us, we won't harm you." Future Sasuke said.

"Got it… shame, hahaha…" Imperial Naruto scratched his head awkwardly, then laughed heartily: "But I sense your muscles; you're not lying or malicious, so I'll trust you. I'll inform His Majesty the Emperor to prepare the Empire for the enemy."

'His Majesty the Emperor? The ruler of this weird place?' Future Sasuke thought, quickly saying: "Please don't. If too many know, it might cause unforeseen issues. The fewer who know, the better. Trust us, we can protect you."

"Got it… fine. But your muscles are crying! That severed arm, at least a decade old—if you're protecting me, get it treated. Find Doctor Haruno Sakura; with her skills, regenerating your arm perfectly isn't hard."

Imperial Naruto smiled, giving Future Sasuke a thumbs-up.

The pose, reminiscent of thick-browed Gai, stunned Boruto and Sasuke.

Boruto muttered: "Haruno Sakura? Aunt Sakura?"

"Sakura…" Future Sasuke murmured.

In this weird world, what would his Sakura be like?

Not muscle-packed like Naruto, right?

That'd be horrifying!

Imagining cuddling Sakura, crushed by her, muscles everywhere, Future Sasuke's face darkened.

Even if his Sakura wasn't like that, the thought was revolting!

"Aunt Sakura? Hey, kid, Sakura's gentle, but she doesn't like being called aunt—she's not that old." Imperial Naruto wagged his index finger.

"Sorry, sorry, I meant Sister Sakura." Boruto scratched his head, sneaking a glance at his teacher.

"Sorry… about treatment, forget it. This is the price of my youthful mistakes; I'll bear the punishment of losing this arm. If healed, who'll answer for those mistakes?" Future Sasuke shook his head, his voice heavy.

Imperial Naruto paused, then sighed. "Is that so? Shame. If you really want to protect me, follow behind. I still need to train little Naruto."

"Little Naruto?" Boruto and Sasuke were shocked.

"Hm? You didn't know? The whole world announced it earlier… never mind…" Imperial Naruto started explaining but, noting their confidence in protecting him, figured they were wild ninja from remote mountains of a past era, so he dropped it.

"He's Uzumaki Naruto, recently joined the Empire, from another world."

"What? You're from another world?"

"Why another world?"

Future Sasuke and Boruto looked stunned, eyes wide.

"What's strange? Dimensional theory's long proven. If interested, check the Empire's library or internet. Roughly, worlds like ours exist in countless numbers, with slight differences."

"Maybe in this world, I'm robust and love muscles. In another, I'm small, love women, or maybe naive and hardworking…"

Imperial Naruto outlined broadly.

Future Sasuke and Boruto exchanged glances.

This was entirely different from the turtle's claims!

How many lies did that turtle tell?

But if everything's exposed and something happens, it'd be regrettable.

Better keep learning about this world.

Boruto and Future Sasuke decided inwardly.

Boruto said: "Then, Big Brother Naruto, let's go. I also want to see what this other world's Big Brother Naruto is like…"

Imperial Naruto nodded: "Follow quick."

He waved, leading them to an open field on the city's outskirts.

From afar, Boruto and Future Sasuke saw a group chatting casually under a giant tree.

The group had one woman and four men.

The woman was over 170 cm tall, the men all above 180 cm.

Seeing their faces clearly, Boruto blurted: "That's Dad… and Mom… Hinata, and Neji, Uncle Chouji… Big Brother Kiba?"

"Huh?"

Hearing their names called, the group turned toward them.

Hinata said softly: "Big Brother Naruto, you're here."

"Big Brother Naruto, finally back. Guide us more. What else do I need to fix? Damn! I don't want to keep lagging behind Naruto." Kiba said, annoyed.

"Though Neji took the main family's eyes, results seem good now, but I must beat him! Big Brother Naruto! Please keep guiding me strictly!" Neji said seriously, eyeing Imperial Naruto.

"Big Brother Naruto, I turned fat into muscle, feeling much stronger. Next time, Shikamaru's shadow mimic won't bind me." Chouji smiled.

Naruto grinned: "Big Brother Naruto! Good morning! Who're the two beside you?"