Chapter-4: Itachi v/s Shisui and Nanobots

It's been 5 years since I've been reincarnated to this world.

I've been training hard and my arsenal of Jutsu keeps on expanding. I convinced otou-san to give me access to the Uchiha Jutsu library and ever since my skill level in ninjutsu has taken a qualitative leap.

(A/N: Fugaku basically wants him to become the strongest and hence it was quite easy for him to agree to get into jutsu library.)

My understanding of hand seals, Chakra molding and Uchiha Taijutsu is still increasing at a constant rate.

I've started to go outside more and make friends with some children which just 'happened' to be clan kids. I am friends with most of the Konoha 11 except Team Guy. I also drag Sasuke along because he too want to come together and play with everyone but being him being an Uchiha doesn't exactly help him.

Sasuke didn't get along with Naruto in particular but was more or less okay with others.

It was naturally easy to be friends because I didn't have a stick up my a*s like other Uchihas and I was always good with children thanks to my time at orphanage in previous world.

The hardest yet the most beneficial one was...

Hinata Hyuga. She was really a cute one. A little clumsy too.

That's right I became her friend. She was a little reserved and wary as she was from Hyuga clan but loosened up when we starting playing with other kids. All of this was incredibly boring for me but I needed to do it for the plan.

Though, teasing Hinata is too fun. Her reactions are incredible and because of her lavender-white eyes, bluish hair and a little tinge of red due embarrassment is too addictive.

She is fun to be together with I'm not gonna lie.

Lately the situation of clan is getting tense and I've seen a few people talking in code words. Maybe planning for the coup?

My chakra control is still improving and I have started tree walking now. My chakra reserves have grown to a chunnin level. I will need to start training my body even more and make the nanobots for my body as my chakra still leans towards yin. AI has completed the model early with help of my 2-tomoe Sharingan.

Otou-san has started sparring with me by limiting his strength by a lot but I still can't defeat him. I need more experience as well as improve my strategizing skill.

I've also started training with my Sharingan and because of that a considerable boost in raw talent was observed.

I also became friends with Naruto. It was easy as he was desperate enough for friends as he was always hated by the masses. And becoming friends with him was just giving a child a chocolate. No literally.

I just gave him a little chocolate with a smile on my face and we became friends. That's it. I didn't even need to do anything. And Hokage cannot be suspicious of me as I was 5 years old.

As to why did I become his friend? He was the protagonist and being a protagonist made it so that he would have a lot of encounters. Whether it be enemies or fortunes. Who knows what I might gain? There is nothing to lose after all.

More opponents= more experience + more Jutsu stealing.

He later became friends with other clan kids too. He will probably remember this and I can exploit it too.

All part of my master plan. Keikaku Doori!

Currently Sasuke and I were currently doing some shuriken practice with Itachi. I had to water down my skills a lot because I didn't want Itachi to suspicious of me. Seriously, his perception and intellect is really fearsome and observation skills are top-notch. He could easily see through Sasuke's flaws in a glance.

After finishing our practice while we were chilling when Shisui came in and asked Itachi to spar with him.

They sparred and it was....interesting.

(Itachi on left and Shisui on right)

First they both activated their Sharingan. Both had 3-tomoe. They stared at each other for a while. Both initiated attack at the same time.

They started with a shuriken battle.

It was quite an amazing as they both threw it in exact same pattern as the other so they were canceling each other out.

Then they both jumped back to gain some distance. Shisui pulled out his tanto and Itachi did it too. Shisui body flickered to Itachi and took the initiative to attack. Itachi defended but recieved a little knockback due to Shisui's velocity. Itachi used the knockback and did swiping kick but Shisui just dodge and threw a kunai at Itachi.

Itachi deflected the kunai and send it in the sky really high. During this he rushed to Shisui to fight a kenjutsu battle. Itachi abruptly stopped fighting in a few seconds and grabbed the kunai he deflected and threw it towards Shisui. While doing this he did a genius move.

He also threw a kunai in the previous kunai's shadow and also was rushing towards Shisui with his own tanto.

Shisui body flickered by the kunai still grazed his arm. He faltered a bit and Itachi used this opening to attack. Shisui blocked the hit and body flickered to his right side.

They both stopped fighting.

Shisui lost to Itachi. Of course result may be different in a life or death battle but Itachi won the spar.

I felt that the fight was amazing and I got a few lessons from it.

When I took a look at Sasuke, I saw his eyes were glittering from excitement. He ran towards Itachi and Shisui and said "That was so COOL!".

"It was an amazing battle especially using the deflected kunai, If the kunai that grazed Shisui was poisoned then he would've been at a serious disadvantage." I said.

They both were satisfied with the fight. Though it may not have been at their full power, it was definitely an amazing one.

They started talking about a few things while Sasuke was being too excited and discussing the fight with me.

"You both should go home. Itachi and I have a mission to do. We will need to go outside for few days so inform your parents." Shisui said.

"Awww c'mon don't be like that! Is it really important to go now? Why don't you teach us how you fought like that." Sasuke threw a tantrum.

'That would be really amazing.' I thought.

"Yeah please teach us how to do that." I said as my eyes were literally twinkling with greed.

Itachi came in front of both us and merely tapped our forehead with his fingers.

"Later Kazuya and Sasuke. I need to do this mission as it is my duty as a ninja." He left while smiling.

I got Itachi Forehead tapped.

We both left for the home.

On our way, I created a shadow clone and quickly substituted it with myself.

The clone left with Sasuke for home. I think it will last for rest of the day.

I sneaked into training ground 44, The forest of death. I've been learning many things from father and one of them was assassination and infiltration so sneaking in the training ground wasn't hard. The guard was a chunnin but he wouldn't even know a thing as I was on a different level in terms of sneaking.

I ran to the centre of the training ground. I encountered many creatures on the way but I ignored and body flickered till I reached a really big tree.

I arrived to the spot where it had a small snake drawn on its bark with a sharp object. It was in dead centre of the training ground.

I made snake hand seal and passed chakra to that snake drawn on the tree.

It made a clicking sound and it revealed a door underneath the tree. I reached inside and turn on the lights to the lab. Light flickered a bit but it was working.

This is Orochimaru's abandoned lab.

I found during my exploration time as I always thought he must've needed a place to start experimenting for the very first time. What place would be better than training ground 44 which was very dangerous and no one likes to be here.

I found it purely based on luck.

But damn he was really uncreative when it came to security. Just a single snake seal was enough. I guess he might've been confident to kill whoever infiltrated his lab as they can't escape from the forest of death in time.

I went inside and was greeted with a lot tools and a machines.

I use this lab now.

In the lab, I found a few manuals and notes related to poisons, some genetic works and Book on seals. He might've left them in a hurry as they were buried deep inside a wooden locker hidden under a table.

Poisons were really basic but in depth analysis was really useful for further studies along with the notes.

Genetic works on the other hand was good. It must be his very first attempts but were really detailed. He kidnapped a few no name Uchihas and Senjus and ran some experiments on them. It provided a basic analysis on both the clan's abilities, so it was handy. I really need to get my hands on his knowledge somehow.

He started checked seals too but it was only till low level stuff. No high level stuff was there.

I didn't have time to check them last time when I found this, so this time I just activated my Sharingan, gave all the pages a glance and asked the AI to store them.

I burned them too so that no one gets their hands on it.

Now onto the Nanobots. It was finished early because of my 2-tomoe sharingan. I was really happy as this will assist me a lot in future.

I started the machine by inputting chakra in it. This machine took me around 3 months to assemble. It took so long because of material shortage but I finally made it so it doesn't really matter.

After an hour or so, a fluid like substance was created and was filled in a syringe. This was fluid like substance was actually the nanobots. they are perfectly harmless and will solely focus on converting all the nutrition I take and to strengthen my body permanently. It will also enhance my growth.

All of it was possible with help of AI.

I injected it into my blood stream through my arm. Initially it hurt a little like someone was piercing my arm but pain subsided in a few seconds.

[Host, Nanobots A1 are online. They will now strengthen the whole body. So host is advised to each extremely nutritious food in excess and start focusing on training the body.]

'Good. Begin integrated research on Chakra transferring, information transferring and nanobots B1. Naruto and Sasuke will receive it. I will inject it in their blood stream and hopefully get his chakra transmitted to me. Who knows I might get their chakra and consequently make Sage of Six path's chakra? It might give me a free ticket to Rinnegan. After all madara did it just by a little piece of Hashirama's flesh. I will do it with Naruto and Sasuke. Name it "Parasite A1."' I thought while having a smirk on my face.

[Okay host.]

[Estimating time: 2 years...]

[Starting research...]

[Incomplete requirements.]

[A chakra sample from both needed to begin.]

'I will get it tomorrow as it is too late today.' I thought as I sneaked to Uchiha clan compound. I arrived to my room that I shared with Sasuke.

Sasuke was sleeping in the futon and my clone too was pretending to sleep in my (his?) own futon.

My clone saw me and released itself. I checked his memories and found nothing important.

I slept for the day. I am making a lot of progress and I think that I will definitely be a jonin level ninja by age of 12. Who knows if all this succeed then I can possibly be a kage level before age of 13.

'It will be really fun.' I thought as I slept.

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(A/N: He will slowly get even stronger. We all want a super op character after all.

As for the love interest, its Hinata.

She is the best option. Idgaf about your opinion on this one.

Nanobots work on chakra as well as a very small percent of nutrition so no extra energy is needed.

Chakra transmittion over a small distance (like around a km) is possible and realistic. Nagato could do it over a really long distance, we are almost in immediate vicinity and they won't even realize this as Sasuke won't be talking about to anyone else other than Kazuya (Sasuke will have trust issues after all so he will blindly trust his own brother) and Naruto is too dumb to spot any change in chakra levels.

Indra's and Ashura's chakra will awaken Rinnegan in an Uchiha.

Madara could do it because he had a small but constant supply of chakra from Hashirama's flesh who was Ashura's reincarnation and he himself was Indra's reincarnation. In our case Both Naruto and Sasuke will be constantly supplying him with a lot of chakra contantly from both the incarnations and hence he will easily get Rinnegan.

As for the EMS, Stay tuned till next time!)