Mc: A former medico reincarnated in Naruto anime. His appearance is same as profile pic.
Forewarning - The chapter upload will be slow this time around as I want the fanfic to be perfect.
AI in BOLD or [ ]
Authors note: * IMPORTANT* The Hypothesis are for those wanting to immerse in the world building, Readers who want to progress with the story can skip them.
-Also, don't confused with term ATP, it is just the smallest form of Calories. Like cells are the smallest unit of our body.
-So, think ATP= Physical energy
P.S - The first chapter more or less explains the mechanics of Chakra, so don't worry about that all the chapters will so info heavy.
'80…81…82…'
Even after a month of living in the orphanage, it still hurts to know that I lost my family and was separated from them in this world too.
'83…84…85'
I lost them twice: once by being reborn here and again by the second Ninja war. The mementos given to me show their exact appearance from my previous life.
In this life, Dad was a merchant based in Konoha, who got killed along with Mom when he went to visit his native village. It happened when the Jonin team assigned to him went to support a returning Anbu team. Now the Anbu might be rescued, but my parents got killed during a robbery gone wrong in the village.
Well, the Jonin was demoted, and the genin got a mark. The bandits near my dad's village were slaughtered by Konoha, and I was left orphaned.
At least, I was arranged in the topmost Orphanage in Konoha, well-funded by donations. Perhaps, it was some compensation from Konoha, along with the financial ones.
By village, I mean the one where dad was born. Not Konoha, which may have been a village when it was established but is now a city by feudal standards.
'86…87…88'
The thing is, I don't have chakra now. The key word is "now."
'95…96…97'
According to the storybooks in the orphanage, the sage gave chakra to everyone. For me, I understand it as the fact that he remade the DNA of a significant proportion of the population to mold chakra. How this happened is a mystery to me.
Over time, it got inherited by the rest of the world. It follows the same principle as herd immunity. When enough people in a population gain immunity or resistance to a disease, they pass it down to the rest of the population in subsequent generations.
The '98…99…100'
"Fucking finally!"
With my face pressed into the grass, I kept breathing hard from the exhaustion of doing 100 punches.
"One set down."
Now, as I was saying, I don't have chakra now. I am not one of the lucky kids with Shinobi heritage. They have evolved their DNA makeup to automatically mold chakra and distribute it throughout their bodies.
Now, civilians can do the same, provided they start young before their bodies mature completely into adulthood.
Chakra seems to safely induce mutations in one's DNA, helping to break human limits.
AI, show the introduction of Chakra made by the visiting shinobi back then.
[Chakra: A fusion of physical energy and spiritual energy that allows one to break one's limits and perform wonders.]
[Hypothesis 1: Physical energy is ATP, the smallest units of biological energy broken from calories. Increased training allows the body to store more and use it more efficiently. Talent from DNA determines its limits until, it can be expanded by chakra under the stress of extreme hard work.]
[Hypothesis 2: Spiritual energy, at least a form of it, is unique to the inhabitants of this world due to the Sage changing the DNA, and it can bind to ATP/Physical energy to form chakra. It can be increased by the experiences endured by the individual. Maturity, emotions, willpower, etc., help in its mobilization and control.]
Now comes Hypothesis 3.
[Hypothesis 3: The reason that child soldiers are a thing, despite the kind men like Hashirama fighting to change it.
The reason that the shinobi are trained from childhood is that it allows the excavation of civilian talents and increases the spiritual side through trauma from death and violence endured. These forced circumstances increase the spiritual side, and the rapid growth of the body as we grow up helps on the physical side, yielding overall greater returns on a comparatively smaller investment.]
In fact, I believe this to be the reason for the growth of power after 18, is not that much compared till then.
I made my way back to the orphanage with swollen hands and feet from my exercises. Doing this without chakra is insane because it may cause damage to my body. The reason I do this—
"Kyudo Kirito, how many times will you keep doing this?"
WHOOSH
I felt the surroundings blur as I heard the scolding from my matron, a retired shinobi named Rimo Kabuki.
Soon, I found myself in front of a Medic Nin who started healing me with his mystic palm.
Now, this is the reason I do this painful training. Normally, other civilian shinobi spend most of the first year trying to form their first chakra through meditation, forcing the fusion of spiritual and physical energy in their bodies.
But that is not the case with me.
I am now 3 years old, born at the same time as Kakashi. I will participate in the 3rd shinobi war. This is a fact.
Because, I am not going to give up on chakra and spend the rest of my life living in fear. Unlike the other civilians, I don't have the luxury of blissful ignorance.
[Scanning the feeling from chakra being induced into the hands.
Recording the feeling and processing the data.
97
98
Chakra scanned and reverse engineering Host's Chakra feeling.
Time remaining: 1 day 23 minutes]
At the end of the day, Chakra is like weird cross between sensations picked by brain and Muscles at the same time. Think of it like a Metaphysical organ.
A slap on the back of my head made me look up from my thoughts as I saw a 40-year-old Matron shouting at me, "Why can't you wait like the rest of the brats? Your hands are swollen and bruised for the last month. It's almost like a clan kid, but unlike them, you have no chakra; you are just approaching your limits faster. Wait for chakra to be molded; then you can start training to be a shinobi."
"No."
"Huh! What did you say, kid?"
I replied, "I am already behind the other kids, and I need to catch up with them at least in body. Besides, there is no fear for my actions because the Medic Nin will heal me properly."
It was true. If I weren't in Konoha, I wouldn't do this.
Tsunade really improved Konoha's healthcare facilities from feudal level to surpassing the modern world's medicine. Konoha is currently on the verge of treating genetic diseases.
In fact, during pregnancy state, the current specialists can prevent genetic anomalies like Down syndrome.
All in all, if the modern medicine is like a slut out for your money, Konoha's medicine is like a queen.
The medic who just healed me, rubbed my head and went back to looking at the other patients in the OP ward.
"Sigh, why are you in such a hurry?", hearing the question from the Matron, I decided to tell the truth.
I looked her in the face and said to her with all my heart, expressing my lack of ignorance, "The world is a terrifying place."
No matter the place or culture, the orphanage are most likely found in the outskirts. Now the reason is simple, it is cheaper and can be expanded easily later.
I walked out early morning 6 into the adjacent forest, the punishments from Rimo-san aleast didn't bar this. Otherwise, I would have already heard her shouting to me to stay in the premises. Trust me, I heard her voice many times to make my ears tingle for hours.
This led for me to believe she is a sensor and the reason she is assigned the orphanage; a sensor is the second-best thing, when compared to torture unit in anti-spy capability.
I sat myself against a tree and sat in the lotus position. I started to take deep breathes and focused the morning chirping of birds and flowing water sounds from the adjacent river.
AI.
[Host chakra reverse engineering
Time remaining: 10
8
7
6
5
4
3
2
1
Completed]
Good, Begin simulation
[Host chakra is being simulated.]
It felt like an adrenaline rush from the stomach, spreading from there to my heart, from there to rest of the body.
It was incredible my body feels alive like I had a buffet after a day of fasting and boosted by Coffee.
I kept focusing on that sensation until AI began prompting,
[Scanning,
Host ATP are being fused with unknown energy in cells and forming Chakra.]
Term it as Spiritual energy.
[Task completed.
Spiritual energy is being released from the soul and fusing with the ATP (physical energy) in cells. Chakra is following the circulatory system throughout body.]
AI, stop the artificial simulation.
[Simulation stopped]
I still felt it. I still feel my chakra flowing through my body rotating along the blood and lymph (tissue fluid).
It's unbelievable, I can feel my muscles, heart beating, my stomach, blood bumping to every part, even the contractions of the intestine. Chakra is like a fusion between the muscles and nerves. It can receive and send information along with movement.
Hmm, Receive and send information.
AI, check whether information of my body can be perceived through Chakra.
[Task received.
Checking. Found the task possible.]
Do it.
[Scanning the body, processing the information.
Showing the data in perceivable form.]
"Haha, Unbelievable."
I saw prompts with ECG data, Vitals, brain waves-EEG and even Muscle sprains. My chakra is completing the task that took machines worth Millions of dollars in my previous life.
No wonder, Tsunade can progress the medical field to such level. She is like a Specialist in all fields with a super speciality hospital in medieval world.
[Warning! Chakra is being consumed as the information is being sent.]
[Glucose reserves are dropping; glycogen reserves are consumed, and Calories are burnt.
ATP levels consumption can't be met.
Information Receiving is halted.]
Then an intense exhaustion hit me as if I spent an entire day running while reading mind numbing medical text.
Chakra exhaustion, though this one is mild one. If AI didn't stop the task, the chakra usage will pull the vital ATP required for normal functioning of body causing Shock, coma and even death is a possibility.
Shinobi naturally train themselves to stop from reaching these limits. Of course, they also train to do the reverse in emergencies.
Same as Kakashi did in the canon, against Zabuza. He went to the extreme ending of a coma.
It was after a heavy breakfast; I came back into the forest.
AI show me the current profile.
[Name: Kyudo Kirito Age: 3 year
Knowledge: Post graduate general medicine, High school level education.
Chakra: 5 units]
As soon as I moulded the chakra again, I felt more fit and energetic.
It seems my cells adapted to sending out more ATP to fuse with Spiritual energy.
There is not much need for me worry about Spiritual energy due to my mental maturity and experiences.
But it's the body I need to train. Then again, I can make myself a regime based on my body for maximum efficiency. Thank god for my AI chip.
AI, implant into me Chakra training exercise- Leaf.
[Consuming 1 unit of Chakra.
Implant completed]
I then found myself experiencing the memory of attaching a leaf to forehead, hand and even feet.
I soon started the exercise by placing the leaf on my forehead, my chakra followed my prompt to move- From Stomach to heart and from there to head.
But it is not consistent with the memory. It's like pulling an unwilling child to school.
AI, scan me for inconsistence.
[Scanning.
Chakra consumed for exercise one unit.
All functions are normal.
Abnormality found: The body is not familiar with the process. It needs repeated attempts to adapt to it.]
Ok. No wonder there. Shinobi clans took generations to change their bloodlines to have easy extracting of Chakra from cells, and send Chakra throughout the body.
Even civilian born shinobi train till they achieve both mental and physical adaption, aka chakra control.
Unlike them, I have a completed mental adaption. Like Uchiha where they can observe and the chakra and process the jutsu with a glance.
Yes, doing the jutsu is simply Chakra usage after our body adapts to the process. But it is not that simple to do, as we say in words.
It is like everyone saying a bullet comes from a gun, but not even a single person can make the gun.
The scary part about Uchiha, is that they even have physical adaption too. That is both sides of chakra usage.
No wonder, In the canon they were driven to extinction due to fear. Without the senju as counterbalance, I can't think the paranoid shinobi can sleep in peace.
Others need years to master these skills, but they can do it in glance.
Sigh.
I just need to practice. AI calculate the attempts to master this exercise. or in scientific terms, for my body to adapt.
[Calculating ….
Leaf exercise attempts- 1/1000]
A 1000 attempts, This is with me cheating with AI.
No, wonder the exercise follows throughout the shinobi school, taking years to be done.
AI show Hypothesis 4
[Hypothesis 4: Chakra is a mixture of Spiritual energy and Physical energy. Jutsu are made from Chakra shaping and Nature transformation.
Now Chakra Shape formation is apex of chakra control.
Nature transformation are the elements- Wind, Fire, Lightning, Earth and Water.
Now each transformation is influenced by variety of factors, but the main ones are the bloodline and nature of chakra. Bloodline is more likely termed for clans like fire release in Uchiha and Sarutobi. Water and Earth in Senju. Chakra nature being the way the chakra flows, if it vibrated then Lightning. It's the reason a seasoned sensor can distinguish the chakra nature on sensing.]
It's the reason the chakra nature can be trained but the problem is changing the way it acts to other. For example, it's like commanding our hands to vibrate every second while doing work.
AI, check my nature.
[Processing the chakra information recorded.
Nature found to be- Fire.]
Fire.
Hmm, check the feasibility from Hypothesis 6-fire
[Hypothesis 6- Fire.
It's the literal burning of ATP as fuel.]
[Feasibility confirmed.]
Simulate the transformation and implant it to me.
[Beginning task,
Time remaining: 3 hours]
I got up and started running. Putting my body through its pace seems to be a good idea while doing waiting.
AI record the process.
I soon forced my chakra to come out from my hand and willed it to burn. A small fire spark came into existence before I collapsed on to the ground with a burning felling throughout my hand. WTF
[Record completed.
Findings: 5 units consumed.
Minor degree burns throughout hand.
Expected time to heal= 7 days.]
No wonder, chakra transformation is started in chunins, anyone below has too low of reserves and weak body to handle the aftereffects.
Sigh
AI, estimate the minimum reserves for holdable training in chakra transformation.
[Compiling data and cross referencing.
Units required: 1000 units.]