["You son of a bitch! Why did you put a bone in me?!" The patient shouted angrily.]
["Guarantees no long-term anesthesia, remains usable permanently." You answered in a leisurely tone.]
[The patient immediately fainted from anger.]
'Haha, this guy is really stupid!'
'Daring to come back for more surgery after the first time."
'Serves him right!'
Takumi laughed in his heart at his own prank in the simulation.
'Truly worthy of a mischievous child!'
'Pulling off an operation like that!'
[By age six, you hit a bottleneck.]
[Due to Chakra, Shinobi rarely get seriously ill. Minor illnesses can be quickly cured with medicine, and over the years, through your study of pharmacology, you had improved many prescriptions.]
[Slightly more difficult were poisons, but in that area, Tsunade was the absolute expert.]
[As Tsunade's younger brother, you were naturally the pupil surpassing the master in this regard.]
[No poison could stump you siblings.]
[But because of the war, patients often appeared missing limbs or even internal organs.]
[So, you decided to attempt organ transplant surgery.]
'Organ transplant? Could it be that he wants to...'
Takumi's eyes lit up.
But he didn't say it out loud, just watched expectantly.
[You found a large group of lab rats with physical defects and prepared to start experiments on them.]
[Starting with simple deformities like missing limbs.]
[Because of the rats' small size, you had to use a microscope for the transplants.]
[Limb transplants were the simplest, with little rejection reaction. Combined with Medical Ninjutsu treatment, they could walk freely very quickly.]
["Medical Ninjutsu is so convenient." You sighed. Without the coordination of Medical Ninjutsu, the rejection reaction of transplant surgery wouldn't be so easily resolved.]
[Next came skin.]
[First, cut away the burned skin, then sew on healthy skin. With the coordination of Medical Ninjutsu, this was also successfully conquered quickly.]
[The rapid progress made you very excited.]
[You continued with smaller appendages, like ears, noses, etc.]
[Although much more precise compared to limbs, relying on your absolute talent in the art of medicine, you still successfully conquered them.]
'The boost Medical Ninjutsu gives to transplant surgery is too great.'
Takumi couldn't help but sigh.
'Will it be smooth sailing from here on out?'
'After all, there's all-purpose Medical Ninjutsu.'
However, the situation suddenly took a turn.
[The first organ transplant: you chose the spleen.]
[Failed.]
[You began recalling the entire surgical process, searching for the reason for failure.]
[Spleen viability: no problem. Blood supply: no problem...]
[You found the reason: the surgery took too long, causing the recipient rat's temperature to become imbalanced.]
[After finding the cause, you continued.]
[Second time, third time.]
[Failure after failure, all stemming from minor issues each time.]
[After identifying them, you engraved these failures in your heart, never making the same mistakes again.]
[Finally, on the fifth attempt, you successfully transplanted the spleen.]
[To be sure, you performed it multiple times. Each subsequent time, you completed the surgery successfully, with the recipient rats showing no adverse reactions.]
'Internal organs really are different from limbs.'
Takumi couldn't help but sigh.
The previous limb transplants were mostly successful on the first try.
But with internal organs, it was failure from the start.
Only succeeding on the fifth try.
Perhaps it's because internal organs have an irreplaceable function inside the body.
Once a time limit is exceeded, or if there's a slight mistake, it leads to surgical failure.
And this was just the spleen.
The real challenges were still ahead.
Like the kidneys, liver, lungs, heart, etc.
None of them could be replaced casually.
Kidneys are somewhat better.
Because the human body has two, temporarily removing one doesn't cause too much trouble.
[Next, you prepared to transplant lungs.]
[Lungs are related to the respiratory system, so during the transplant process, extremely accurate control of the transplant time is required.]
[As well as the method to replace lung function.]
[Simple anesthesia doesn't work.]
[You didn't have a good method, and could only try to complete the transplant surgery in the shortest possible time.]
[The first time, you naturally failed.]
[But you were not discouraged at all, continuously performing transplant surgeries, even though the sky had long since darkened, you never left.]
[Your persistence for medical skills gave you a spirit of never slacking.]
'After all, it's Heaven Canceller.'
Takumi watched the young Takumi in the simulation. Even though the sky was completely dark, he was still in the operating room using a microscope to perform transplant surgeries on rats.
That level of concentration, that difficulty.
It was extraordinary!
[After over ten failures, you became extremely proficient in every step.]
[You were confident the next time would be a success.]
[But your spirit was extremely weary. You passed out.]
[When you woke up, you were still in the operating room.]
[After eating a simple meal, you continued devoting all your energy into it.]
Watching the young Takumi work so hard, Takumi was moved almost to tears.
'Although he's a mischievous child, he would definitely become a good doctor in the future!'
Takumi was very convinced.
[Finally, after perfecting the minimum time required for all steps, you successfully completed your first lung transplant surgery.]
[With the first success, the second and third came naturally.]
[After thoroughly mastering lung transplant surgery, you began kidney transplant surgery.]
[Kidney transplant surgery wasn't difficult. With the help of Medical Ninjutsu reducing the rejection reaction, you completed the transplant on the very third attempt.]
[To ensure you could succeed every time, you performed it ten times in a row, perfectly completing the transplant surgery each time.]
'Striving for perfect results every time.'
Takumi's heart was filled with emotion.
"Go for it!" He couldn't help but whisper softly, then quickly covered his mouth.
Behind him, Tsunade mumbled something and turned over to continue sleeping.
[Unknowingly, you could successfully perform transplant surgeries for other internal organs.]
[Now, it was time for the extremely crucial heart.]
[The heart is a person's engine, the most important organ in the human body.]
[You were very cautious about heart transplant surgery.]
[Before each surgery, you would review several times the easily made minor mistakes, ensuring you wouldn't commit them.]
[Yet, the first time you still failed.]
[The transplant surgery exceeded the time limit, the heart's viability decreased.]
[Transplant surgery is a race against time.]
[Only by replacing the heart in the shortest time can the heart's survival be guaranteed.]
Perhaps because of the heart's importance, Takumi watched as the young Takumi performed reviews several times before each surgery.
It was enough to see the young Takumi's serious attitude towards heart transplant surgery.
If the young Takumi maintained ten points of focus for other transplant surgeries, then for heart transplant surgery it was fifteen points of focus!
More focused than someone who pays no attention to the outside world!
[The second time, still failed.]
[But you were not discouraged at all. You knew heart transplant surgery wasn't that simple.]
[Third time, fourth time, fifth time... tenth time, still failed.]
[But you could already see the dawn.]
[Each failure allowed you to find ways to save time.]
[You believed you would succeed soon.]
[Finally, on the twelfth transplant attempt, you succeeded.]
[The recipient rat successfully survived, appeared very healthy, and showed no adverse reactions.]
[You were excited, but still cautiously reviewed the entire process, wanting to find areas for improvement.]
[With the first success, the second seemed to come naturally.]
[To make the surgical process become muscle memory, you continuously performed the surgery until the entire process was thoroughly memorized.]
'If even the heart can be replaced, what's left after that?'
Takumi sighed.
Having such a persistent pursuit of medical skills at such a young age…
If it were him, he was sure he couldn't be this focused.
Although the Mischievous Child talent made the young Takumi's personality like a mischievous child, in terms of medical skills, he was truly admirable.
Living in the operating room day and night, performing surgeries unceasingly.
Even after fainting and waking up, just eating a simple meal and continuing.
This kind of persistent spirit is admirable!
[The successful heart transplant made you breathe a huge sigh of relief.]
[But you knew the final challenge awaited you.]
[That was the most mysterious region of the human body: the brain.]
[The field of the brain had never been completely conquered.]
[It had too many secrets waiting for people to unearth.]
[Fortunately, you weren't trying to unearth its mysteries… you just wanted to give it a move.]
'A move?'
Takumi chuckled in his heart.
'That was a rather gentle way to describe it.'
But when he saw the specific surgical process, Takumi immediately stopped laughing.
Looking at the opened skull, Takumi couldn't help but shudder.
And this was just a rat. If it were a person, the scene would be even more frightening.
[Brain transplant surgery was the most difficult and also the most ethically problematic type of surgery.]
[Because human memories are stored in the brain, performing a brain transplant surgery creates an ethical paradox.]
[For example, if you transplant A's brain into B's head, is B now A or B?]
[You didn't care about this situation at the moment, you just wanted to complete the brain transplant surgery.]
[As for the specifics, you could only know by observing after truly succeeding.]
[The brain, relatively speaking, doesn't necessarily require complete integrity.]
[Even with some damage, the brain can still function normally.]
[But the precision of the brain still added great difficulty to the transplant surgery.]
[Failure, failure, failure, still failure.]
[You fell into confusion. During the surgery, the brain would enter a state of death.]
[Even though you tried your best to shorten the time, you still couldn't finish the transplant before the brain itself entered a state of death.]
[After dozens of attempts, not one succeeded.]
[But you didn't lose heart.]
[You started looking for other methods.]
Takumi followed the simulation, watching the young Takumi fail countless times.
From initial tension to current numbness, he didn't know how to solve the problem of the brain automatically entering a death state.
But the clever young Takumi quickly found a way.
[You tried methods outside of medical knowledge.]
[This idea broadened your thinking. You thought of a brilliant method.]
[That was: Genjutsu!]
[Directly cast a Genjutsu on the brain, keeping it in an active state.]
[With the biggest problem solved, it was a matter of constantly racing against time.]
[After failing another dozen or so times, you finally succeeded.]
[The recipient rat successfully survived and showed no adverse reactions.]
[You couldn't tell from the rat's condition whether it was now A or B, but that didn't prevent your mood from becoming happy.]
[Afterwards, you continued performing the transplant surgery.]
[A series of successes allowed you to thoroughly master brain transplant surgery.]
[You had finally completed all transplant surgeries!]