[Day 1]

Hi! How are you?

You might be wondering why I would Ask you this question, And frankly I don't care since No one other than me can read this diary.

Did I tell you Who I am?

Ah yes, I forgot. Let me introduce myself, My name is... was Fred. I was a normal Medical student about to graduate from a prestigious medical school when I Died in my sleep, without completing my goals of being a doctor and ever having a girlfriend.

Yeah, I know, You don't have to remind me. I died a virgin.

Well then?

Then, I woke up. In front of a tree sitting across it, In a body I didn't recognize with only a few memories intact.

From the broken memories I could scavenge, This body's name was Ayato Shikai, a 6 year old. He had dark hair with a small streak of dark blue hair, I didn't know what that meant but from what I remembered from the boy's memories, he had The same coloured hair as the blue streak.

I found it strange that someone's hair colour could change when another soul is put into it, I Theorised that it most likely represented the consciousness, the black representing me and the small blue streak represented Ayato, well the Ayato Ayato, since I am the owner of this body now.

I didn't know nor know now how the boy had died But I have given him a chance to fulfil his dreams through me.

I navigated to his home a few minutes later, in the outskirts of konoha, just near the walls. I scavenged through the house, finding a few ninja equipment along with kunai and shuriken, A fat stack of Ryo was also waiting for me, this should handle me for a few months at least.

It seems that Ayato has relations with Ninjas, Hmm, I wonder who they might be.

***

[Month 3]

Hey, Again.

Its been three months since I wrote this diary.

I have finally found a few things about Ayato, His parents were Ninjas. and died on duty while serving konoha on the battle front of the second shinobi war, Ayato was 3 when it happened.

I also started to train, It was about a month ago when I started doing few basic Body weight exercises.

One of them was An Uchiha, my mother, I still don't know her name but I remember the Crimson red eyes with spinning commas. The memories from Ayato are still hazy to me but I will keep a record of anything I find, and of course I wrote this diary in English, do you think I would expose myself as a Reincarnate by writing all this stuff in kanji, Quite humorous of you.

Humorous sounds like quite the Exquisite word, I will use it more often.

***

[Month 4]

Hi, Although you don't appreciate my hospitality, I will still try and be kind to you.

It's been another month, And I have been keeping my training up, I can now throw shuriken and kunai property, My ken-jutsu is also not half bad. Thankfully my parents left me a few basic books on training.

And good news, The academy is also starting in a few weeks, I will keep you updated through this diary when I actually go and give the entrance exam.

***

[Month 5, Day 9]

Well, I passed pretty easily.

Yesterday, I went to the academy to take the entrance exam and found out that I am not really that much of a genius as I expected myself to be, I was just the middle man between above average and class best.

The other kids like some of the other hatake and Uchiha kids completely baffled me with their sheer genius.

Eventhough I have the knowledge of a doctor, I understand the body well and my knowledge on Naruto tells me everything thing I need to get stronger, I am still not in Thier level, Though in a one on one I would still win against them, Most likely, Probably.

[Month 6, Day 11]

Yeah, the academy is boring.

No wonder Naruto skipped it daily, it's been one days since I started the academy and yet I am tired of it, the first day was just brainwashing and propaganda of the leaf village.

That damn third hokage and his evil ways.

***

[Year 1, Day 11]

Uh, Sorry for not keeping you updated.

I can't believe I have not touched this diary for over Eight months, but Sorry for not updating.

I just remembered To update this faster I realised that half a year has passed since I started my first day of the academy. .y semi annual exam is next week and I am preparing for it currently.

***

(I cannot write this anymore, I will just skip to when he is 10)

[Year 4, Month 6, Day 7]

Yeah, I failed the test.

I have failed the opportunity to join under a jounin Sensei, It's all due to those damn smug Uchiha's I was out into a team with, Eventhough they don't even have the Sharingan to prove their Authentication.

Kinda ironic that I have an almost fully matured Sharingan, I don't remember when I actually awoke it but I think it might be due to over exerting my body and mind.

Which proves one theory I had in my previous life, Sharingan can be evolved with sheer effort and hardwork. Although I am not a genius, I still have the strength of a normal chunin without my Sharingan, with it I can reach low jounin level in strength.

My chakra level has also reached the low jounin level, my chakra control is also quite good, I am able to climb trees using feet and walk on water.

Did I mention that I am developing a Genjutsu to conceal my Sharingan. I can't be revealing that now can I, Otherwise Itachi might also target me.

Another thing I realised that I am just a few years younger than Obito, Which puts me around the same age as Kakashi or maybe a year younger.

Anyways, I am just a reserve gennin now but that means I can go on solo missions and group up with a bunch of other reserve gennins, I won't need to go on harder missions and I have more time to grow my strength but not much opportunities.

***

[Year 5, month 7, Day 2]

Another year has passed since I last updated this diary and I have finally started to hit my limit it seems, my body and reached the state of low jounin with constant training and my chakra reserves are stuck on jounin level, My yin chakra has already reached the high Jounin level (Yin chakra is represented by the overall mind or soul power of someone and since MC has Reincarnated his soul and mind power is higher than others not to mention his Uchiha lineage.) it seems but my Yang chakra is lacking behind, It seems like whenever I Catch my Yang chakra to my yin chakra my Sharingan evolves but my yin also increases further due to the development of my visual prowess, this might be the reason why I have the three tomoe Sharingan at such a young age, well the age of my young body.

So, my current goal is to increase my Yang chakra in order to evolve my Sharingan to the mangekyo or Eternal mangekyo.

I have Also started to experiment and research on the human body, I am no orochimaru but I am a medical student with far more advancements and knowledge on the human body than 50 percent of the medical ninjas in this world.

***

[Year 7, Month 9, Day 19]

It has been a long time since I wrote on this diary and it has a reason, I have spent so much time researching Yang and Yin cells and training that I Have not even had time to do missions to maintain my living conditions, I am currently living in a run down apartment.

After two years I have finally found a cure to my Yang problem, my yin chakra has already reached elite jounin while my Yang chakra is still stuck on the low jounin to Mid jounin level, Not to mention I didn't know any other ninjutsu except the three basic academy techniques and a few fire jutsu's left behind by my mother.

The cure to my Yang problem is a really concentrated solution of my Yang cells that are capable of high cell division rates with only a 10% cancer cell development chance. And even if they get cancer, it is mostlikely not going to accept my body that much because of a healing factor that happens due to chakra, It is like the fast healing of Naruto with Kurama's chakra but instead of biju chakra, Normal chakra in humans is being used. It is slower but it does prevent the production of cancer cells in human body.

Taking into account that I have a 10% chance of getting cancer from this solution the rates are reduced by almost A tenth when chakra is taken into account, Which means I have less than a 1 percent chance of getting cancer, which is almost close to zero.

I just need to Inject a bit of this solution into my body and the results should appear in a year or two.

*********** CHAPTER 1 END ***********

I know this is a little bit bs but I need an explanation of the MC getting the Rinnegan.