Reincarated with Nanites

~ Hayatou's Pov, the next day... ~

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[Are you sure you want to do this, host? This could be extremely dangerous.]

'I know, but I don't have much of a choice… When the fight begins, I'll already be at a disadvantage if I keep my weights on. Still, I don't plan on dropping them—not even in this match. I want the fight to be as close in taijutsu as possible.'

[Even so, infiltrating the Uchiha Clan grounds is dangerous... It is not something I recommend.]

N.E.O.'s voice carried an unusual sense of caution, something that rarely happened. It wasn't wrong—the Uchiha were one of the most paranoid and skilled clans in the village. Even if I was only going to observe, there was always a risk of being detected.

[It would be more beneficial for you to focus on refining your current abilities. Using all your strength in training would yield greater results than sneaking into an area filled with skilled shinobi...]

'I'd agree with you under normal, but desperate times calls for desperate measures... I doubt I can just ask sensei Toyo to teach me any ninjutsu skills, or anything else other than the basic things we've been taught up until now... Hiruzen considers me a genius, so he expects such. Which means he'll make my life difficult for this test...'

[...I will help you as much as I can.]

'Thank you N.E.O. I still need to get a bit closer to their training field...'

I continued moving as carefully as I could through the outskirts of the Uchiha training grounds, my steps silent, my breathing controlled. Even from this distance, I could already hear the rhythmic clash of kunai, the sharp bursts of Fire Release techniques igniting the air, and the sound of high-speed taijutsu exchanges.

[You are now within proximity of multiple chakra signatures, host. Three groups, each consisting of two to four individuals.]

'I figured as much. Now, let's find the best vantage point.'

My eyes scanned the area, analyzing every shadow, every rooftop, every blind spot in their patrol routes. The Uchiha Police Force was pretty competent, but they weren't infallible. Their confidence in their Sharingan made them overly reliant on visual detection—which meant if I stayed outside their direct line of sight and suppressed my chakra, I could avoid them entirely...

I moved swiftly, scaling the side of a nearby building and crouching against the roof's edge. From here, I had a clear view of their sparring area.

And that's when I saw them.

A group of young Uchiha—academy students, much older than I was but were already leagues ahead of their peers... Their movements were crisp, precise, and deliberate. They weren't just fighting; they were refining their techniques, dissecting every motion, every strike, until it was perfect.

My eyes locked onto one in particular—an even older boy compared to the rest, maybe thirteen or fourteen, near effortlessly weaving through a shuriken drill like it was the back of his hand. His hands blurred as he threw the three at once, bouncing them off trees, redirecting them midair with perfectly timed kunai strikes.

Shurikenjutsu mastery…

I nodded to myself. This were the skills I needed. If I could break down how they used their tools, how they controlled their attack angles, how they applied their fire-based jutsu in combat… I could incorporate it into my own fighting style.

'N.E.O, record their movement patterns. I want a breakdown of their form, stance, and muscle engagement.'

[Already in progress, host. I will provide combat analysis upon request.]

I smirked slightly. Good.

Now, at this point; I just had to observe and learn...

I remained crouched against the rooftop's edge, my gaze fixed on the Uchiha sparring session below.

Every move, every step, every flick of their wrists—I analyzed all of it. The way they shifted their weight when throwing shuriken, the precise moment they activated Fire Release for maximum efficiency, the instinctive micro-adjustments they made mid-fight to maintain their offensive pressure.

This was the difference between a standard academy student and a true prodigy.

[Combat data successfully recorded. Processing efficiency rates…]

I barely acknowledged N.E.O.'s voice as I watched one of the older boys—the same one who had demonstrated his shuriken mastery earlier—step into the ring against a younger opponent.

A sparring match.

This was my chance to see how an Uchiha really fought in a live scenario. The moment their teacher gave the signal, both combatants vanished, their bodies must be blurring to the younger students...

To be honest, they were quite fast.

The younger Uchiha moved first, closing the distance with smooth, efficient footwork, already preparing to launch an attack. But the older boy barely reacted—his stance was low, controlled. But to me, it was still very predictable, still, it was better than anyone I've seen at the academy.

The moment his opponent got within range, he moved.

It wasn't anything flashy—no exaggerated movements, no wasted motion. He simply shifted his weight, rotated his body just enough to evade the incoming strike, and countered with a powerful palm thrust to the chest.

The impact sent the younger boy skidding backward, his breath catching as he struggled to regain his footing.

An impressive level of control…

[Observation: The elder Uchiha demonstrates superior combat efficiency... Minimal movement, maximum effect. His attack precision is strictly calculated to disrupt his opponent's balance rather than cause severe damage.]

'I see it…'

The younger boy recovered quickly and threw a kunai, immediately following up with a hand seal. "Fire Style: Phoenix Fire Jutsu!"

Small, fast-moving fireballs shot out toward the older Uchiha, forcing him to react, hell, he's even working.

This time, the older boy activated his Sharingan.

Everything changed.

His body moved with unnatural smoothness, sidestepping each fireball before it even got close. As the last one approached, he casually knocked it aside with a kunai—like swatting away a stray leaf in the wind.

I gritted my teeth.

That's the power of the Sharingan.

Even without raw speed, he could track every attack, predict movements before they even finished forming. It was unfair—but that didn't mean it was unstoppable.

[Host, I have compiled a countermeasure list. Would you like an analysis?]

I smirked. 'Not yet… let's see how this fight ends first.'

The younger Uchiha tried to press forward, attempting to overwhelm with sheer aggression, but the momentum was pretty much already lost. The older boy caught his next punch easily, twisted his wrist, and with a simple redirection of force—sent him crashing into the dirt.

The sparring match was over.

Silence filled the training field before their teacher finally nodded. "That's enough for today."

I exhaled slowly.

I had seen enough.

Fire Style, high-speed shuriken techniques, and the overwhelming advantage of the Sharingan. These were the Uchiha's weapons. But even with all that power, their fighting style wasn't perfect. There were gaps—small ones, but they definitely existed.

And now?

Now I had everything I needed.

'Alright, N.E.O, let's head back. Start running combat simulations based on what we recorded.'

[Affirmative, host. Compiling counter-strategies.]

With one last glance at the training field, I quickly slipped away, moving through the shadows unnoticed.

Tonight, I had gained knowledge.

And soon? I'd turn that knowledge into power. 

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END