"It's too slow, the sun is about to set, what are you going to do?"

As soon as Shiraishi returned, Ruri frowned and asked.

"I'm sorry, because the medicinal herbs I want are relatively rare, and after looking for a lot of shops, I found one that sells it. Here's the natto you want. ”

After apologizing, Shiraishi threw the snack bag containing natto in his hand to Ruri.

Ruri took the snack bag with natto, and her face softened slightly.

"By the way, if it's okay, I'll go back to the lab first, there's a bunch of things to do."

Seeing that Ruri was still sitting there, Shiraishi lifted his feet and left the room.

After collecting Ayane's new body data, the rest of the work can only be handled by himself.

Whether it's a caged bird or a perfect fusion of natural energy and ordinary chakra into an immortal chakra, you need to do it yourself.

It has been almost a week since the Sand Hidden Force in the territory of the Fire Extinguishing Country returned to Konoha, and the next mission should be in the near future, and it will not be more than half a month at the latest.

No matter how hard it is said that Konoha still has a hard war to fight, as one of the elite shinobi in Konoha, their leading teacher in the fifth class, Qimu Shuomao, naturally cannot rest in the village for too long.

As for what exactly to do in the next mission, Shiraishi can't deduce useful information based on the available intelligence, but the difficulty of the mission is at least A-level.

When he returned to the laboratory, Shiraishi opened one of the secret doors, and there was a thirty-square-sized room inside, with a toilet and shower room for urgent toilets, where the five people used for human experiments usually lived.

The lights inside were always on, so when Shiraishi opened the door, they could clearly see Shiraishi's appearance, and their bodies shook unnaturally.

Then one person walked out very consciously in order, although his spirit had recovered a lot after such a long rest, but the terrifying memories that came to his mind with it followed, and he probably knew what to do with Baishi next, and his face was a little pale.

Shiraishi nodded with a little satisfaction, that's it.

Take the initiative to cooperate, don't resist, he can get some rich and delicious nutritious meals as a matter of course, and the life is much better than the robber life outside who is wandering and licking blood on the knife edge.

After the man walked out, Shiraishi looked at the remaining four people, took out two books that were not very thick from his ninja bag, and threw them in front of the four of them.

"Read more books when you're fine, books are good things that make human beings progress."

The four prisoners inside looked at each other, not knowing what medicine was being sold in the white stone gourd.

Shiraishi didn't explain anything, mainly because these guys usually look too boring, so finding two books for them to read can not only pass the time, but also help them a lot in their mental recovery.

Shiraishi closed the secret door, and when he turned around, he found that the person who had just come out was already lying on the operating table and in place, staring at the light above with a pair of eyes open.

If you can't resist, enjoy it.

Anyway, there is no worry about food and clothing here, and it is indeed much better than the chaos outside.

"Lord Shiraishi, can you give me more anesthetics?"

Seeing Shiraishi walk to his side, he turned his head and asked in a whisper.

“……”

Shiraishi didn't know how to answer.

But he didn't do what the subject himself thought.

If the anesthetic is used too much, it will cause circulatory failure to the human body and cause the heart to stop, so the dosage and usage need to be cautious.

"Rest assured, based on humanitarian human experiments, I will be responsible for your health and life safety. And compared to last time, my experiment has made a lot of progress, and it should be less painful. ”

Shiraishi patiently explained.

Konoha has not promulgated a code of conduct for human experimentation, but Shiraishi has always followed the rules of his previous life.

In particular, human experiments, which are unethical, cannot be arbitrarily applied to practice.

In order to protect the physical interests of the parties, in order to promote the development of medicine, and in accordance with the principles set by science, Shiraishi has always adhered to them.

When there are signs of mental breakdown, stop in time and replace it with another person.

And if immortal art is successful, it can also lead to the development of medicine, there is no doubt about it.

The experiment itself is also in line with science, based on a complete theory, and has accumulated enough animal cases, it can be said that the risk is very low.

It didn't start with the human body because of the slow progress.

In addition to violating Article 1 of the principle of informed consent of the parties...... However, in this war era, Shiraishi felt that he could act cheaply, and there was no need to be so detailed.

Shiraishi picked up a syringe filled with natural energy liquid and began injecting it into the subject.

In order to avoid problems, when Shiraishi injects natural energy, it is based on the physical fitness of the subject himself, including the maximum chakra that can be guided in the body, and carries out a neutralization reaction to create a complete immortal chakra in the subject's body.

After the formation of the Immortal Chakra, it is necessary to observe the subject's rejection of the Immortal Chakra, the maximum duration, and whether it will cause damage to various organs of the human body.

When he first used animals to fuse the Immortal Chakra, Shiraishi already knew that the cultivation of Immortal Magic was full of unknown dangers.

It is precisely because of the unknown that we must be careful not to take too many steps at once.

The experiment is manifested in the fact that the whole body is connected to the fine wires, and the terminal of the wires is a very large computer, which can reflect various body data of the test subject in time and accurately record it in the computer's database.

In this way, the test subject is placed on the operating table and recorded at any time by computer.

Shiraishi began another experiment - the caged bird crack.

The question of whether or not he would die after the chakra was drained had been haunting Shiraishi's mind.

However, this kind of experiment cannot be directly applied to humans, and it is still necessary to start with animals.

Just like humans, animals in nature also have chakras in their bodies.

To this end, Shiraishi prepared fifty mice that could be used for experiments to carry out the 'Chakra Disappearance' experiment.

If this experiment can be successful, it will be of great help in cracking the caged bird.

Even if it can't be solved perfectly, it provides a rational way of thinking.

An hour later, the subject who was conducting the natural energy and ordinary chakra neutralization and immortal chakra experiments had ended.

As far as the results of the experiment are concerned, there has been a little bit of progress compared to the last time, and at this progress, there is a high probability that he will find out the immortal art system suitable for human cultivation before he leaves Konoha.

Unplug the wires from the subject's body and let him go back to the room behind the secret door.

However, before going back, the subject took two books from the nearby bookshelf and stole a glance at Shiraishi to see how Shiraishi reacted.

Shiraishi just turned a blind eye to this and didn't say anything.

There are many kinds of books on the shelves, including history, geography, chemistry, and biology, but there are no important research materials on them.

Learning is an important process for enlightening humanity.

They have this kind of learning energy, and Shiraishi is naturally willing to support it.

But it's important to be a test subject when it's time to do it.

Shiraishi looked at the mouse on the experimental table who was killed directly because he drained the chakra, and shook his head.

The experiment failed.

Although the lives of these mice were saved as much as possible, the effect was still not great.

Seeing that the time was almost up, Shiraishi was about to leave the laboratory when a sudden cold hit his throat, causing his hairs to stand on end.

The sharp kunai was just in front of Shiraishi's throat, and it only took a light touch to make him disappear from this world.