A Date with Tsunade at the Laboratory

Konoha Hospital.

Next to the Medical Training Class were the laboratory and offices.

At that moment, Shiraha was seeking Tsunade's guidance in her office.

With the war temporarily over, Tsunade would remain in the village as long as no new major conflict broke out and no important missions arose.

As a medical expert, Tsunade would visit the hospital even when she had no missions.

Tsunade placed great importance on training Medical Ninjas, and the establishment of the Medical Training Class was the result of her repeated efforts.

During the war, far too many wounded had died because they did not receive treatment in time.

As the most outstanding student in this year's Medical Corps, Shiraha had satisfied Tsunade in every respect.

"Tsunade-sensei, I've always had a question for you. Under normal circumstances, how long can cells survive outside the body? And to what extent can Medical Ninjutsu affect cells?"

Shiraha wore an eager, humble expression as he thirsted for knowledge.

When it came to medical knowledge alone, Shiraha did not think he was much inferior to Tsunade. In his previous life, he had specialized in pharmacology and often followed his mentor in conducting many pharmaceutical experiments.

However, in the ninja world, Shiraha knew he was far inferior to Tsunade when it came to applying Chakra to medicine.

Chakra possessed many miraculous properties.

In the original story, Orochimaru had even developed something as unconventional as the Reincarnation Jutsu, a kind of "immortality technique."

There was also the Impure World Reincarnation, which could actually bring the dead back to life. That had already surpassed Shiraha's understanding.

Shiraha had yet to systematically research Chakra's properties or the differences between human cells in the Naruto World and those from his previous life.

It was not because he lacked interest.

On the contrary, Wizards were naturally drawn to exploring the unknown, and Shiraha was extremely curious about Chakra.

He simply planned to first reach Third-Class Apprentice, or even First-Level Warlock, before slowly getting into research.

For now, staying alive was more important.

The main reason he had come to ask Tsunade questions was to obtain some of her cells.

"Have you already become interested in cellular research?"

Tsunade looked at the copy of "Advanced Medical Ninja Knowledge" in Shiraha's hands, surprise written all over her face.

She had participated in compiling this textbook, so she naturally knew how difficult its contents were. It was knowledge that beginners simply could not comprehend.

But if it was Shiraha, she could understand.

This brat was a genius!

"Last time, I observed Minami-senpai and the others treating patients, and I gained some insight into the Healing Resuscitation Technique.

"This technique uses a part of the wounded person's body as a medium, changing the cellular composition of the medium to heal the wound.

"It requires a jutsu formula during treatment and places extremely high demands on Chakra control and cellular proportions.

"Theoretically, if a cell's vitality is strong enough, could even severed limbs be reattached?"

Shiraha asked with a curious expression.

Upon hearing this, Tsunade opened her desk drawer, pulled out a book, found a record of a relevant case for Shiraha to read, and then explained.

"Generally speaking, the survival time of cells outside the body depends on the specific type of cell.

"If we disregard the environment and assume laboratory conditions that provide cells with the best possible conditions for survival—

"Highly differentiated cells that cannot replicate, such as nerve cells and cardiac muscle cells, will basically die after being outside the body for several dozen hours because they cannot replicate and renew themselves.

"Stem cells with the ability to replicate can survive longer, around three to five months.

"The time also varies according to the growth characteristics of different cells.

"These are the conclusions drawn from current research on the cells of most people.

"However, there are some special individuals among ninjas whose cellular vitality cannot be described by common sense.

"With the current level of Medical Ninjutsu, it is impossible to reattach severed limbs. That much is certain.

"Unless—"

"Unless what?!" Shiraha asked with the expression of an intensely curious child.

Tsunade hesitated. Considering Shiraha's medical skill, he would learn of these things sooner or later, so she explained.

"Unless the cell vitality is like my grandfather's!"

"The First Hokage?!" Shiraha said.

Tsunade nodded. "Grandfather has been dead for more than a decade, but his cells are still alive even now. Their vitality is incredibly high, capable of devouring other cells and continuously replicating and strengthening themselves.

"Even the less active portions surpass the cells of every ninja in Konoha."

Shiraha's heart stirred. By that logic, weren't First Hokage Cells basically like cancer cells, possessing a similar ability to replicate without limit?

No wonder the First Hokage was hailed in the textbooks as the God of Shinobi!

According to the plot of the first part, Orochimaru had used the Impure World Reincarnation to summon the First and Second Hokage. Yet the two of them together had been defeated by the elderly Third Hokage. Shiraha had thought it meant the Third Hokage was too strong, while the First and Second Hokage were too weak.

Now it seemed that the problem lay with the Forbidden Technique of Impure World Reincarnation itself.

"Perhaps the First Hokage's cells meet the advancement requirements for a First-Level Warlock—a Super Radiation Creature!" Shiraha's pupils contracted.

"Don't even think about it. Grandfather's cells are under strict supervision. Even I don't have the authority to obtain them."

Seeing Shiraha's curious expression, Tsunade spoke irritably.

"Grandfather's cells are too dangerous. The current level of Medical Ninjutsu cannot make effective use of them."

Although she said that, Tsunade thought highly of Shiraha.

Every generation in the village produced many geniuses, but there were very few people like Shiraha, who were both exceptionally gifted and so obsessed with medical research.

While children his age were still learning the basics of Medical Ninjutsu and training their Chakra control, Shiraha had already become interested in advanced knowledge like cellular research.

"You little brat! Learn the Mystical Palm Technique before you start thinking about these things!" Seeing Shiraha's unwilling expression, Tsunade could not help poking his forehead with her finger.

The Mystical Palm Technique was a Rank A ninjutsu. Even in all of Konoha, only a small number of Medical Ninjas could use it proficiently.

Tsunade had high expectations for Shiraha.

"My body hasn't fully developed yet, and my Chakra isn't sufficient to support training in the Mystical Palm Technique. But I'll definitely learn it sooner or later!" Shiraha rubbed his reddened forehead, unwilling to concede.

His Chakra reserves were still somewhat low. Although they had increased severalfold due to improvements in his physique and Mental Power, his foundation had been too small.

Clearly, aside from Mental Energy and Physical Energy, other factors also influenced the growth of Chakra.

For example, ninjas born into certain Ninja Clans naturally possessed larger Chakra reserves, especially Kushina of the Uzumaki Clan and Tsunade of the Senju Clan.

Sooner or later, Shiraha would uncover the secrets of Chakra.

"Alright, alright. If you have no other questions, hurry up and leave. I still have work to do!" Tsunade waved her hand impatiently, seemingly trying to send Shiraha away.

Shiraha glanced downward and teased, "Tsunade-sensei, are you in such a hurry to get rid of me because you want to drink in secret? I saw a bottle in your drawer."

Upon hearing that, Tsunade immediately turned sideways and thrust out her full chest to block Shiraha's view, saying indignantly,

"What nonsense are you talking about, you little brat?! How could I, as a teacher, do something like that?!"

"Nawaki-senpai told me."

"Looks like it's been far too long since I beat him up!" Tsunade's gaze instantly turned terrifying as her clenched fist cracked.

"Um... Tsunade-sensei, the First Hokage was your grandfather, so your cells should have high vitality too. Could I perhaps—" Shiraha still refused to give up.

Tsunade froze for a moment, then immediately understood. "You want mine?"

Seeing Shiraha's serious expression, she knew that if she did not satisfy him, he probably would not let the matter go.

"Fine, I'll give you some. But you have to promise me you won't use them for anything strange, and you must conduct your research within my sight!" Tsunade intended to make Shiraha back down in the face of difficulty.

"Great! Hooray! As expected of Konoha's gentlest, kindest, most beautiful, and most generous Tsunade-sensei!" Shiraha excitedly jumped up from his seat and cheered.

"You sure know how to talk." Tsunade spoke irritably. This brat was both practical and troublesome. "Come with me next door!"

Shiraha lowered his head, suppressing the excitement in his eyes, and followed Tsunade into the laboratory next door.

Tsunade shut the laboratory door, took out a Syringe, rolled up her sleeve, and drew a small amount of blood for Shiraha.

Then she stood to the side with her arms folded, allowing Shiraha to conduct the experiment himself while waiting for him to ask for help.

With his back to Tsunade, Shiraha injected her blood into a Culture Dish. During a pause in the experiment, his finger casually brushed against it.

The cells in Tsunade's blood instantly lost their vitality.

Obtained Cells of a Powerful Radioactive Creature (1/1). Cell vitality and bloodline purity meet the standard. Quality: Excellent.

Second-Class Apprentice advancement requirements: 1. Mental Power ≥3, Physique ≥1, completed; 2. Cells or Tears of a Powerful Radioactive Creature (2/2), completed.

The data displayed beneath the Eye of Truth made Shiraha clench his fists.

He could finally advance!