Reincarated with Nanites

~ Hayatou's Pov, An hour later ~

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'Alright, this should be more than far enough away for what we need to do… I've already wasted a day out of my three to do this, and I plan to make full use of it.'

I exhaled, stretching my arms before rolling my shoulders. The clearing was quiet, isolated, exactly what I needed. No distractions, no wandering eyes—just me, my thoughts, and the new knowledge I had gathered. This was where things would finally start coming together.

[I will imprint the recorded data from the Uchiha's hand seals and their improved martial arts techniques… Do you wish to visualize it?]

I shook my head, my lips curling into a small smirk. 'No need. I already saw everything they did. Memorized all of it. Just upload their martial arts techniques—I'll handle the rest.'

[Affirmative. Beginning data transfer.]

Then, it hit me.

It was subtle—no dramatic rush, no overwhelming flood of foreign information—just pure understanding slotting neatly into my mind, as if it had been there the whole time.

I instinctively clenched my fists, feeling the immediate difference. Every adjustment, every refined movement the Uchiha had demonstrated, every fluid transition in their stance—I understood all of it. The way their weight shifted before an attack, the efficiency behind their strikes, the natural counters woven seamlessly into their combat flow.

It was practically second nature already.

And the best part? It didn't even make me flinch. My processing speed and cognitive capacity had already evolved far beyond normal limits, so instead of feeling overwhelmed, I felt enhanced—like a machine receiving a long-overdue software update.

'Alright. Let's put this to the test.'

I stepped forward, my body already adapting, adjusting without thought. I moved into a stance—not my usual one, but theirs. Lower center of gravity, weight evenly distributed, hands raised in a loose but deceptively ready position. My muscles instinctively tensed and relaxed in perfect intervals, ready to react in an instant.

I threw a strike, a lightning-fast open-palm counter, mimicking the Uchiha's sparring techniques.

Swish~

I immediately followed up, twisting my body mid-motion, shifting into a low sweeping kick before springing back up into a defensive posture. Each movement felt flawless, as if I had spent years drilling them into my muscle memory. It's an absolute cheat to have N.E.O by my side...

I grinned, exhaling. 'Yeah… this is going to be fun.'

But I wasn't done yet.

The hand seals—that was the next step and major concern.

'N.E.O., show me their fire-style sequences. I want to see how they integrate them into combat.'

[Understood, host. Compiling sequence variations… Displaying now.]

A mental overlay appeared in my mind—Uchiha academy students, Genin, Chūnin, even a few older ones—all performing Fire Release jutsu, their hand seals flowing seamlessly into their attacks. Some incorporated them mid-movement, blending them into their taijutsu to create devastating follow-ups. Others prioritized efficiency, shortening the sequence to cast faster, sacrificing power for speed and adaptability.

I watched it all, absorbing every detail.

'Alright… let's see if I can do it too.'

This was why I had gone to observe them in the first place. Not just to learn—but to adapt, to refine, to make it my own.

I weaved the first jutsu sequence I'd ever done, I went with my memory while fingers moving through the Ox → Tiger → Monkey → Boar → Horse → Tiger pattern fluidly, without a single hesitation...

No jutsu came out, of course. I didn't want to shoot out any Fire Release jutsus. Not yet.

But that wasn't the point now.

The speed, the precision, the muscle memory—I needed to build that up first. If I could master the seals before even unlocking the element, then once I did, I'd be ahead of anyone my age trying to learn it from scratch, making it second nature...

I repeated the sequence. Then again. Then faster. Each time, it became slightly smoother, cleaner and slightly sharper.

[Your reaction speed, and hand dexterity have already improved by 3.7% in the past five minutes, host...]

Good, I'm definitely seeing improvement.

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I kept repeating the sequences for the past few hours; my fingers weaving through the hand signs at an accelerating pace. At first, I focused purely on precision—making sure each sign was formed correctly, making sure there was no wasted movement. Then, as the motions became much smoother, I shifted for more speed.

'Faster.''Faster!''Faster!!'

My hands practically blurred through each of the sequences, my movements now practically instinctual. If I had Fire Release, I knew I could have already executed the jutsu mid-fight without breaking any rhythm or momentum.

[Hand seal execution efficiency: 92.8%.]

'Not bad, but it's still not good enough.'

I wasn't just trying to be fast—I wanted them all to be absolutely perfect. The Uchiha had years of training to reach their level, but thanks to N.E.O., I was compressing all of that into a few hours.

I ran through the seals again.Then again.Then again.

I wasn't stopping until I could do them flawlessly, even under immense combat conditions...

[Efficiency at 96.5%. Muscle adaptation in progress. Neural response speed increased by a further 4.2%.]

Good. That was what I wanted.

But there was more to my training than just seals...

'Alright, N.E.O, now overlay their Shurikenjutsu patterns. I want full trajectory mapping, angles of release, and spin adjustments. Let's see if their techniques are as sharp as they think they are.'

[Understood. Compiling Uchiha projectile data… Displaying now.]

Instantly, thousands of visual projections flooded my mind—simulated movements of Uchiha students, Genin, and even Chuunin performing advanced shuriken techniques. Their form, their release timing, the subtle wrist flicks that altered trajectory mid-flight—I saw all of it.

I reached into my pouch, grabbing the handful of shuriken I had on me.

It was time to see just how fast I could adapt... I couldn't rely on N.E.O with every little thing forever, I had to put in more of the work myself...

I threw the first one—standard, straightforward, nothing fancy. Then, I adjusted. I copied their angles, their launch positions, all the micro-movements they made to add control. I threw another. Then another.

Each one hit closer to the mark.

[Spin control adjusted. Predictive arc mapping enabled. Projected accuracy increase: 5.6%.]

I could already feel a slight change in my movements—my body was already learning, integrating all of this, making their techniques my own, and I even understood them on a deeper level as well.

I grabbed two shuriken this time. Threw them at the exact same time.

Both clashed in mid-air, ricocheting toward their targets at a sharper angle—just like the Uchiha had done.

Yes… That's it!

[Projectile mastery synchronization in progress. Would you like to run real-time trajectory adjustments?]

'Yeah. Keep adjusting my release based on real-time physics... I want every throw to be calculated down to the millimeter increments.'

[Affirmative, host.]

I threw both of them again. This time, three shuriken at once. They curved through the air, bending toward the target as if guided by an unseen hand.

Perfect...

"Phew~" I lowered my arm, my body still itching to push, even a little bit further. I want to have complete mastery of all their movements by tonight. Tomorrow is the practical application.

A shame I only have a few hours left before the day ends... Heck, I might as well run some combat simulation while I'm at it too. Those should help give me that extra bit of motivation.

'Alright N.E.O, I want you to enable combat simulation mode. I'll need to go even harder on myself.'

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END