The medical class progressed smoothly for the next month, and Uchiha Toki tested his students' knowledge.
While the other students took theoretical exams and demonstrated their skills in medical Ninjutsu, Natsuo was only evaluated on the theoretical part.
After all, Natsuo had only just begun receiving shinobi training, so it wasn't realistic to teach him medical ninjutsu.
Initially, Uchiha Toki only gave Natsuo a sheet with 20 questions to test his knowledge up to that point. He didn't expect much from the test.
What she didn't expect, and was totally surprised by, was that Natsuo returned the sheet with all the questions answered correctly.
Uchiha Toki didn't think the boy was cheating because she supervised everyone's exam in the classroom and no one escaped her view.
Curious and surprised, Uchiha Toki evaluated Natsuo again in person. But this time with more complicated questions.
And once again, Natsuo surprised Uchiha Toki.
Although these were all questions that the students could answer by reading all the books they would learn during this period, Uchiha Toki did not expect that a 6-year-old child could achieve it.
And since Natsuo answered the questions in front of her, he didn't cheat.
After asking a few questions, Uchiha Toki was surprised by the boy's learning ability.
She took a book from her desk and the child answered all the questions she gave him with ease.
It was days later when Uchiha Toki learned that Natsuo visited the hospital library every day without fail and was pleased by the boy's enthusiasm for learning.
By today, Natsuo had caught up with the other girls on the theoretical part.
And as Natsuo thought, his intelligence didn't attract much attention, and Uchiha Toki only gave him some chakra control exercises.
Once Natsuo masters them, he can return to Uchiha Toki to learn Medical Ninjutsu.
Natsuo thanked the woman and returned to the orphanage.
Having already read a large number of books in the hospital library, he will devote his time to his physical and chakra training.
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The clan's medical ninja training period ended 2 months later and Natsuo only passed the theoretical part.
But since he failed the practical part, he will have to take the class again the following month.
This didn't bother Natsuo, who now had free time to train in the afternoon.
Previously, he only had time in the mornings, before going to the academy, to train his body by running around the clan compound. And at night he practiced the chakra control exercises that Uchiha Toki taught him.
In addition to tree walking and water walking, a medical ninja needs to train in more sophisticated chakra control exercises in order to be able to use medical ninjutsu.
This exercise was called the sand manipulation exercise.
And no, it's not like a bloodline limit; rather, chakra is used to manipulate grains of sand and separate them by color. At an advanced level, figures could be created with the sand.
But Natsuo only started training in the most difficult chakra exercises 2 weeks after Uchiha Toki showed them to him.
At first he had already secretly learned to walk on vertical surfaces, and all he needed to learn was to walk on water.
With his great chakra control, it only took him 1 day to learn it and 2 days to run naturally over a river that passed through the clan's compound.
After learning to run on water, Natsuo was in no hurry to learn the exercise of manipulating sand.
Instead, he perfected his ability to walk on vertical surfaces and over water.
What he did was place leaves on his tenketsu points as he walked along tree trunks or across water. And the more leaves he could attach to his body, the greater his chakra control ability became.
When he was finally running in his underwear above the river while his body was wrapped in leaves, Natsuo was satisfied with his chakra control.
That same night, while he slept on his bed and the other children in the orphanage slept on theirs, Natsuo had his hand raised with some sand on the palm of his hand.
These grains of sand had 7 different colors and were completely mixed together.
Natsuo was able to obtain this small amount of 7-colored sand from the hospital because he was in the clan's medical program class.
The exercise consisted of gathering grains of sand of the same color and repeating that process over and over again.
The faster you do it, the better your chakra control level will be.
That night, it took Natsuo 10 minutes to separate the sand into equal colors. And when medical classes at the hospital ended, Natsuo only needed 5 minutes to sort the 7 colors of sand.
With better chakra control, Natsuo's physical training improved.
This is because after running around the clan compound and training his arms by doing push-ups, Natsuo stimulated his lungs to take in more air and recover faster.
With better chakra control, his lungs worked more efficiently.
But that wasn't all.
Yang Chakra also circulated throughout his body, gradually strengthening him.
Of course, the daily improvement was minuscule, almost imperceptible. But it added up, and over time Natsuo's body would become terrifying.
After the Medical Ninja class at the hospital ended, a month would pass before the next term began. And Natsuo spent that entire month focusing on his physical training in the afternoons and his chakra control at night.
As for academia?
Natsuo went unnoticed at the academy, hiding like any other student.
Aside from his fight against Nawaki at the beginning of class, Natsuo maintained his strength at the same level and allowed other students to surpass him. In this way, the others quickly forgot his title of genius.
After all, that class had several children from clans in the village, so it was expected that those children would improve quickly and surpass Natsuo.
It didn't matter if he was an Uchiha, he was an orphan after all.
Regarding Natsuo's decline in performance?
Natsuo's training at the hospital was no secret, so he used the excuse of having less time to train.
Nobody noticed anything and nobody said anything.
Of course, if someone saw the amount of chakra Natsuo had in his small body, they would be surprised by his improvement in these months.
Natsuo was only 6 years old, but he already had the same amount of chakra as a genius fresh out of the academy.
It should be noted that at the beginning of the academy, Natsuo's chakra amount was average for his age, surpassing only civilian children.
After all, despite being an Uchiha, Natsuo's parents were ordinary civilians.
But now, after almost 3 months, Natsuo's chakra has grown explosively.
Of course, this growth was logical.
The chakra was made up of physical energy and spiritual energy.
Natsuo's spiritual energy was abundant.
Besides being her second life, she has managed to learn a great deal of information in recent years. And with her mind palace, that information would never be forgotten. Instead, it would continue to grow, and so would her spiritual energy.
Natsuo had little physical energy when he was younger. After all, his parents were just civilians.
But this changed with his training in recent years.
Although it wasn't too strenuous a workout to damage his growing body, his progress was steady.
Along with his breathing method, he made his physical strength grow every day.
With his abundant and continuously growing spiritual and physical energy, it was logical that his chakra would grow in that way.
Of course, others didn't know and would be surprised if they did.
Fortunately for Natsuo, his chakra control training allowed him to manipulate the amount of chakra escaping from his tenketsu, enabling him to deceive even a sensitive ninja. In this way, no teacher at the academy could sense his true chakra levels.
Not even the Uchiha and Hyuga could know the truth, even if they used their special eyes.
Natsuo's method tricked the Sharingan and Byakugan, and would only be discovered if he were forced to use more chakra than necessary.
But even then, Natsuo didn't think he would attract any more attention.
After all, there was one genius in the class.
Nawaki Senju.
Not only did he have the blood of the First Hokage running through his veins, but he also had the guidance of several elders from his clan.
So, even if Natsuo's chakra amount is known, the focus would still be on Nawaki.