With the medical scroll Tsunade gave him before leaving, Taiichi knew his training plan had to be adjusted again. He needed to pick up his medical ninjutsu studies in earnest, not just practice them in his spare time like before.
Besides, he now had a "student" who would come over occasionally to ask for medical knowledge, which required Taiichi to reorganize the knowledge he had mastered.
Just as Taiichi finished his morning training, Rin arrived at his house bearing gifts.
Seeing Rin at the door carrying a fruit basket, Taiichi felt that she really knew how to conduct herself. Unlike a certain "cool white-haired poser" and a "hot-blooded idiot," who always came empty-handed and left with full bellies.
No wonder Rin could act as the lubricant between Obito and Kakashi. It wasn't just because Obito and Kakashi liked her; it was mostly because her social skills were excellent.
Taiichi invited Rin inside and led her to the study.
"So, is there anything you don't understand?" Taiichi asked warmly.
"Mm." Rin seemed a bit shy, but then thought of something. "Taiichi, I went to find Shizune this morning. I wanted us to come see you together, but there was no one home, and the door was locked. Do you know why?"
Hearing Rin's question, Taiichi's eyes dimmed as he recalled the parting scene from that morning.
"Shizune suspended her studies and went traveling with her family." Taiichi couldn't tell Rin about Tsunade, of course. That was somewhat confidential, as Tsunade's presence was a deterrent to other ninja villages. Especially Chiyo of the Sand Village, who was particularly countered by Tsunade.
"Is that so? Even though we just agreed to study together..." Rin seemed a bit down, muttering softly to herself so Taiichi couldn't hear clearly.
However, she quickly composed herself and asked Taiichi all the questions she had accumulated overnight.
By answering Rin's questions, Taiichi also reconsolidated and reorganized his own medical abilities.
> [You conducted medical instruction. Your comprehension has improved.]
...
After answering Rin's questions, Taiichi assigned her today's learning tasks and let her practice on her own. He sat aside and began reading the scroll Tsunade had left behind.
Tsunade had left not only a vast amount of medical knowledge in the scroll but also methods for training many ninjutsu. These included high-difficulty medical ninjutsu like Creation Rebirth and Yin Healing Wound Destruction, and even conjectures on the incomplete Creation Rebirth technique, as well as her signature Taijutsu—Cherry Blossom Impact.
Reading the contents carefully, Taiichi realized Tsunade had left all her legacy to him, and by extension, to Konoha.
The room fell into silence, broken only occasionally by the sound of conversation when Rin asked a question, or the rustling of clothes as she practiced hand seals for the Healing Jutsu.
This peaceful time lasted until noon, when a thud broke the tranquility. Taiichi looked up from the long scroll to see Rin sitting on the floor, her face pale.
Taiichi's heart tightened. He rushed forward, pressing down on Rin's shoulder as she tried to get up. A warm green light glowed in his hand as he grabbed her arm, slowly sending Chakra into her body.
"Taiichi, I'm fine. I just got tired and fell," Rin tried to explain anxiously.
Taiichi rolled his eyes at her and didn't reply, focusing instead on sensing her internal condition. With his "teacher aura" fully active, a single glare was enough to silence Rin obediently.
Physical fatigue and severe stamina depletion were minor issues; a little rest would fix them. But her cells showed signs of over-extraction—that was not a minor issue.
Taiichi gave Rin a reproachful look, making her feel even more flustered. Then, the Chakra in Taiichi's hand shifted from pale green to emerald green. He had increased the intensity of his Yang Nature Transformation, combining it with the Mystical Palm Jutsu to nourish Rin's overtaxed cells.
Rin felt the warm Chakra spreading through her body slowly turn cool and refreshing. As this coolness diffused, her heavy body felt like it had shed a massive burden, becoming incredibly light.
Rin had no idea what kind of treatment she was receiving. This was Taiichi's unique method of body maintenance, combining the nourishing techniques from his Advanced Taijutsu with Yang Nature Transformation. It was the only one of its kind in the ninja world, and the effects were immediate.
The only downside was the high requirement for Chakra volume and Yang Nature Transformation. Taiichi had only mastered it slowly after his Yang Nature Transformation reached Lv6.
After only a short while of nourishing her, beads of sweat appeared on Taiichi's forehead. This was a sign of severe depletion of both Chakra and mental energy.
Watching Taiichi, Rin grew worried—not just for herself, but for him. She didn't want to drag him down because of her own issues.
After a few more minutes, Taiichi withdrew his hand, the gathered Chakra slowly dissipating. He sat back in his chair, drank a cup of tea, exhaled a long breath, and spoke solemnly to Rin.
"Rin, I know you're eager to become stronger, but training must have limits. Especially Chakra refinement. There is a limit to how much Chakra you can actively refine each day. Once you exceed it, you overdraw the potential of your body's cells."
"This not only affects the upper limit of your ninja abilities but, more importantly, your lifespan." Taiichi spoke earnestly. "You must pay attention during your usual training. Once you feel a heaviness in your body while refining Chakra, stop immediately. That is your body sending you a signal; you must not ignore it."
Rin listened quietly. She knew Taiichi meant well, and besides, this kind of knowledge wasn't taught in school. Teachers would at most remind students not to overtrain.
Firstly, the village was eager for every student to become combat-ready quickly. Secondly, not everyone could sense this condition. Rin could sense the heaviness because she had the talent of a medical ninja, with higher Chakra control and sensory perception than ordinary people. For average people, by the time they felt heaviness, they were already suffering severe deficits.
Both rested for a while. After Taiichi explained the difficulties she had encountered earlier, Rin took the initiative to leave. She agreed to come to Taiichi's place to study every morning for the next few days. As for school, she would naturally ask for leave.
Seeing Rin off, Taiichi made a simple lunch. After solving the problem of hunger, he picked up the medical scroll and resumed studying. His day was spent in a cycle: studying until bored, then training; training until tired, then studying again.
Therefore, strong people were not just talented. Taiichi didn't rely solely on his panel to become strong quickly. Without spending a massive amount of time learning and training, even the best hardware would slowly go to waste.