Several months had passed since Naruto mastered Tree Walking and transitioned to the Middle Stage of Body Tempering.
Life at the Academy had settled into a predictable groove. By day, he remained the "solid average student," pleasing Iruka and not annoying his classmates. The nights belonged to the Sanctuary.
In the cold silence of the dungeon, he spent hours perfecting his main defense—Qi Camouflage (Color Overlay).
Now he could keep the white flow hidden beneath a layer of unruly blue chakra constantly, even in his sleep. This required constant background Concentration, but it provided safety.
Naruto was ready to test his new skills—especially his stabilized Qi Sensory—in the field.
But first, food.
With a wolfish appetite and a pleasant ache in his body, he headed to Ichiraku Ramen. This place had become a second home, an island of warmth where there was no need to hide his abilities, nor to use them.
"Oh, Naruto! Hello!" Ayame-neesan greeted him with a sunny smile, wiping her hands on her apron. "The usual, special double-egg portion?"
"Yes, please." He sank wearily into his favorite chair in the corner.
While Teuchi worked his magic on the broth, Ayame leaned her elbows on the counter, studying the boy. She hadn't seen him for almost a week.
"You know, Naruto..." she began uncertainly, tilting her head. "It sounds strange... but you seem to have grown."
The boy blinked, looking up from examining the pattern on his chopsticks.
"I'm still short."
The girl laughed.
"I don't mean height, silly! You... changed. Your skin is clearer; the greyness is gone. And your eyes... they were always blue, but now they're somehow... clearer? Like you can see better."
A direct result of the Middle Stage of Body Tempering. Toxins had been purged not just from his muscles, but from his bone marrow. His body was shedding the consequences of poverty.
"Probably your ramen, neesan. Good food works miracles."
"Oh, well, of course!" She playfully swatted him with a towel. "Flatterer. But seriously. You look great. And you act... more mature. That's good."
Simple praise meant more than any grade from Iruka.
…
The chance to test his Sensory skills presented itself a couple of days later, during a survival lesson.
Iruka-sensei led the class into the dense forest near the Academy. Enormous trees blocked out the sky, creating an eternal twilight. The air smelled of damp earth, mushrooms, and pine needles.
"Attention!" The teacher's voice echoed between the trunks. "A true shinobi is not only one who attacks, but one who cannot be found. Today's lesson is the basics of stealth!"
The rules were simple: one hides within the designated square, and the others have fifteen minutes to find them.
"First to hide... Shino Aburame!"
The boy in dark glasses nodded silently and stepped into the thicket.
"Search!"
The class scattered. Kiba buried his nose in the ground; Akamaru whined, sneezing.
"Damn!" Inuzuka spat. "This guy is everywhere! The whole forest stinks of bugs!"
Naruto remained in place. Closed his eyes, activating his Sensory perception.
The world of sounds receded, replaced by vibrations. He felt the warm, chaotic auras of his classmates running around. But he couldn't find Shino. His aura was scattered into a thousand tiny points.
Bugs... Creating false chakra signatures. Clever.
Fifteen minutes expired. Shino won.
"Excellent! Perfect use of clan techniques!" Iruka praised. "Now... we need someone truly difficult. Sasuke, your turn!"
The Uchiha smirked, stepping forward.
"You'll need more than fifteen minutes."
"Begin!"
Sasuke didn't run. He took a step back, into the deep shadow of a tree, and... vanished. Dissolved into thin air.
The class gasped.
"Search!"
Chaos ensued. Kiba and Akamaru rushed about, unable to catch a scent. Shino's bugs circled aimlessly. The girls simply ran around shouting their idol's name.
Naruto remained in place again, closing his eyes.
Can't see. Or hear. But...
He expanded his sphere of perception. Scanned the forest's vibrations.
He felt life: squirrels, birds, beetles, worms. He felt the noisy auras of his classmates.
He searched for Sasuke's aura—the cold, sharp chakra of an Uchiha.
It wasn't there. The forest seemed empty.
He couldn't just disappear...
Naruto scanned again, searching now not for presence, but for absence. An anomaly.
And he found it.
Fifty meters to the north, high up on an old oak, there was a "hole."
A silent imprint.
A place where natural vibrations were absent. Birds flew around the branch, beetles didn't crawl there, leaves didn't rustle. Sasuke suppressed his presence so strongly that he created a vacuum in the living background of the forest. He became a dead zone.
There.
Naruto opened his eyes and walked with confident strides.
"Hey, where are you going?" Kiba shouted. "Giving up? Going home to cry?"
Without answering, Uzumaki approached the old oak and stopped.
"Found you."
The class, seeing this, gathered curiously behind him.
"What is it?" Ino whispered.
"The Outcast has totally lost it, talking to a tree," Inuzuka snorted.
Naruto looked up into the dense crown.
"What?" Kiba squinted. "There's no one there! I would have smelled him!"
"Come out, Sasuke!" Naruto said louder, not taking his eyes off a specific branch. "I know you're there!"
Silence. The forest froze.
Then, a shadow dropped silently from the foliage.
Sasuke landed in a perfect stance without making a sound. The grass barely bent.
The class gasped again. Kiba choked on air. Iruka dropped his clipboard.
The Uchiha's face was a mask of cold fury. Black eyes drilled into his rival.
Caught. The genius, the pride of the clan, the master of stealth found. Not by Iruka-sensei, not by Shino... but by Naruto. By this nobody.
"Naruto..." The teacher looked stunned. "How?! Even Kiba didn't smell him! Sasuke hid his chakra completely! How did you find him?"
The boy shrugged, adopting a slightly foolish look.
"He was breathing too loudly, sensei."
...
The excuse was so ridiculous and brazen that Iruka found no answer. He simply shook his head, recorded the result, and praised him for his "incredible hearing."
They were returning to the classroom. Naruto walked last, keeping to the shadows.
Suddenly, he was slammed into the corridor wall, in a blind spot.
Sasuke's hand gripped the collar of his t-shirt. His face was inches away. Darkness swirled in his black eyes, scarier than any dojutsu.
"You're lying," the Uchiha hissed, his voice quiet and dangerous as a snake. "I wasn't breathing. I have complete control over my breath. I slowed my heart rate. You couldn't have heard."
Naruto looked calmly into the furious eyes. His Qi flowed evenly.
"Then you were just unlucky." A slight, irritating half-smile.
"It's not about luck." Sasuke narrowed his eyes, trying to read something on his rival's face, to see through the image of the "average student." "The victory over Kiba. The kunai throws. Your... 'bad control.' And now this."
He shook Naruto, banging his back against the wall.
"I don't know what you're doing or what you're hiding, loser... but I will find out."
Releasing him as abruptly as he had grabbed him, he walked away without looking back.
Naruto adjusted his t-shirt, smoothing out the wrinkles.
He noticed. Not the power, but the inconsistency.
The rivalry was becoming real.