Seeing the wind shift in Qingyu's favor, Obito grew anxious and hurriedly explained, "Hey, hey, that's not what I meant! I just meant that... shuriken are just too ordinary!"
"Obito!" Rin Nohara said quickly.
Seeing this, Obito scrambled to explain himself, but unfortunately, he only made things worse.
Kakashi couldn't even be bothered to retort; he simply shook his head and continued practicing his shuriken throwing.
Qingyu didn't say anything more either, picking up a shuriken and beginning his throwing training according to the teacher's instructions.
With the added benefit of the Hatake Style Shurikenjutsu traits he had just gained from Kakashi, Qingyu felt that his throwing motion was indeed much more efficient, as the way he exerted force from his wrist had been invisibly optimized.
Saving physical energy means saving chakra, Qingyu mused to himself.
If he could conserve more physical energy, it would be beneficial for casting ninjutsu later on.
According to the official databook, the mixture of physical energy and spiritual energy is called stamina.
And stamina can be converted into chakra.
This type of chakra is non-elemental; for instance, Naruto's most basic Rasengan uses a sphere of non-elemental chakra spinning at high speed.
If one wants to change the nature of non-elemental chakra, it must pass through the heart, the largest part of the meridian system.
The meridian system is the channel that carries chakra, with connections to the meridian system present in every cell of the human body.
With it, one can refine chakra at any time and gather it wherever it is needed.
Soon, the day's lessons came to an end.
Qingyu packed up his ninja tool pouch, said goodbye to Kakashi and Rin Nohara, and walked toward home alone.
Pushing open the door, Tsunade was sprawled on the sofa in an incredibly heroic posture.
She wore a loose green coat, with a gray sleeveless top outlining her voluptuous silhouette, and her long, fair legs were casually crossed over the edge of the coffee table.
She didn't even lift her eyelids; seeing Qingyu return, she just lazily flicked her fingers.
"Qingyu... go to the fridge and get me a bottle of water..."
Qingyu silently changed his shoes; he was already used to Tsunade's lack of decorum.
He walked to the kitchen and took a bottle of ice water from the fridge.
When he returned to hand it to Tsunade, his gaze inevitably passed over a certain unfathomable cleavage.
As Qingyu gazed into the abyss, the abyss also gazed back at him.
Tsunade flicked Qingyu on the forehead.
"You didn't come back last night."
Qingyu rubbed his forehead, shutting down his auto-aim.
"Oh, I went to pick up Shizune."
Tsunade twisted the cap back on the bottle and gestured with her chin toward the kitchen.
Qingyu followed her gaze and only then noticed there was someone else in the kitchen.
A little girl with black hair, about his age, was walking out carrying a plate of sliced fruit.
"Qingyu, you're back."
"Shizune."
Qingyu greeted Shizune as well; the two of them had a pretty good relationship.
Shizune was an orphan, so she had followed her uncle Dan Katō. After Dan Katō died, Tsunade saw how pitiful she was and took her in as a disciple.
Therefore, her situation was actually very similar to Qingyu's.
"Didn't Shizune have to attend the entrance ceremony yesterday?" Qingyu asked curiously.
He hadn't heard the chunin instructor call Shizune's name yesterday, and he hadn't helped with any files because he hadn't seen her at all.
"Yesterday happened to be the anniversary of her parents' passing, so she couldn't make it back in time; I only just brought her back today." Tsunade waved her hand and pointed to the files on the table. "Don't worry, I notified the Ninja Academy in advance, and it's only one day of classes missed—she can just make it up later."
Qingyu nodded, understanding the reason.
"Then when will you teach me medical arts?" Qingyu brought the topic back.
"I've only covered the theoretical foundations so far; I haven't taught you any formal medical ninjutsu yet."
Tsunade grew a bit more serious upon hearing his question.
At Qingyu's age, he was indeed ready to begin formal training in medical ninjutsu.
She had previously conducted a special test regarding Qingyu's chakra affinities.
He possessed five in total: Yin, Yang, Water, Fire, and Earth.
Tsunade also possessed five affinities, though she lacked the Yin element and instead had the Lightning element.
The result of that test was exactly what Tsunade had been looking for—to see if Qingyu possessed the Yang affinity.
Having this specific chakra affinity meant possessing the most crucial innate prerequisite for learning medical ninjutsu.
"Shizune, come here for a moment."
Tsunade called out toward the kitchen.
Once Shizune had dried her hands and trotted over, Tsunade gestured for the two of them to sit before her.
"Starting today, I will teach you formal medical ninjutsu."
As she spoke, Tsunade spread out her right palm.
A ball of soft, green chakra emerged from her palm, appearing as if she were cradling a green light.
"This is a D-rank medical ninjutsu called the Chakra Healing Technique, the most fundamental of its kind."
"The chakra used in medical ninjutsu must be Yang-release chakra, because the nature of Yang-release is to bestow vitality; only Yang-release chakra can stimulate cellular regeneration."
"If you were to forcibly inject chakra of other affinities into a wounded person, it would not only fail to heal the injury but would instead cause secondary damage."
Tsunade explained.
"Therefore, the first step in learning medical ninjutsu is to extract non-elemental chakra from within your body and then convert it into Yang-release chakra."
Qingyu listened quietly.
This step was essentially "nature transformation," much like the burning of flames or the flowing of water.
And if one were to alter its form, that would be what is known as "shape transformation."
These two points essentially defined all ninjutsu.
"You two try it first."
Tsunade said.
Shizune nodded, closed her eyes, and brought her hands together slightly in front of her.
On the other side, Qingyu activated his scarlet Sharingan, intending to see if he could copy the technique.
The copying ability of a one-tomoe Sharingan was limited.
The stronger the Sharingan, the greater the insight, making it easier to see through the details of chakra flow and thereby learn another person's techniques; the reverse was also true.
"The Sharingan, is it."
Tsunade glanced at Qingyu's Sharingan.
She held no prejudice against the Uchiha clan, so she could calmly accept the existence of someone like Qingyu.
[Detected collectible trait: Healing Talent]
[E-rank trait: Healing Talent]
[Effect: Increases the healing effect on trauma-based injuries by an additional 10%.]
[Synthesis: Two evolutionary paths available]
[Path 1: Combine with "E-rank trait: Simple Bandaging" + "E-rank trait: Basic Hemostasis" to synthesize D-rank trait: Masterful Hemostasis.]
[Path 2: Combine with "E-rank trait: Natural Talent" + "E-rank trait: Superior Memory" to synthesize D-rank trait: Innate Medical Saint Body.]
Qingyu swept a glance over the prompt that appeared before refocusing his attention on his palm.
He extracted non-elemental chakra from the cells throughout his body and, following the essentials Tsunade had just described, attempted to perform the nature transformation of Yang-release.
The process went more smoothly than he had imagined.
Perhaps the efficiency bonus from his solitary training, brought about by the Solitude of a Genius trait he had previously acquired, was playing a role; Qingyu felt his chakra control was even more adept than usual.
Coupled with the assistance of his Sharingan, he soon saw results.
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