Because an adult needs an experimental subject to be cultivated for a longer time, and Orochimaru is reluctant to use up the original body, Hinata Shinichi is still the first experiment.

Shinichi's parents and Sarutobi Hizashi were waiting anxiously outside the laboratory, and there were only two people in the laboratory, Hinata Yunchuan and Orochimaru.

The first step is to anesthetize the subject.

Because the wound of his severed limb had largely healed, it was necessary to remove part of the tissue that had grown out to replace the new limb.

After that, drugs that inhibit rejection are injected.

When transplanting a limb, the transplanted limb bones are temporarily fixed with steel plates to connect the bones of the transplanted limb with the original bones, and then the blood vessels are combed and the nerves are adjusted for connection.

This set of processes, Orochimaru and Hinata Yunchuan are already familiar with the road.

The wound is then healed.

The transplant process is not a problem, the patient's values are normal, and the focus is on the reaction after the transplant, which is also the part that Orochimaru and Hinata Yunchuan are most concerned about.

The next few days will need to be observed, but it is not until then that the family will not be allowed to visit......

After the strength of the medicine passed, Shinichi Hinata, who was anesthetized, woke up.

According to the procedure, Hinata Yunchuan tested his perception of the legs, as well as basic muscle control, after all, nerves are the most error-prone place, as long as there is no problem here, the basic work is done.

After all, it was Orochimaru who personally took action, and it seems that there is no problem at present.

Orochimaru took off his blood-stained gloves and threw them aside.

"Ah~ starved to death...... Is there anything you want to eat in Yunchuan? ”

Hinata Yunchuan pointed to the wooden box placed on the utility table in the corner.

"I brought the Soldier Food Pills, Teacher~"

"It seems that this is a protracted battle, but the family will come in and deliver food later...... This feels so strange, I didn't expect that my Orochimaru would also be a doctor one day, so ...... See you later~"

"Well, goodbye, teacher."

"Hey......

Orochimaru left the lab with a smile and satisfaction, and by the way, let in the family members who were waiting outside.

He's like that, as long as he can explore something unknown, whether it's studying ninjutsu or exploring the mysteries of the human body, the whole person is full of enthusiasm, and he won't think about other messes at all.

All this is not only to make up for the fragility of life, but also the only ideal that Orochimaru can find......

……

"Shinichi, how are you feeling!"

"I can feel my legs, Mom!"

"Really......"

"Of course, Mom, look at my toes, I can already move......"

……

Hinata Yunchuan sat away from the operating table, slowly recovering the consumed chakra and energy, watching the family of three rejoice in rekindling hope.

Sarutobi leaned against the door and looked at it, but finally didn't come in.

Hope is hope, but the experiment is just beginning.

After a month, if there are no problems, it can be considered a success, and it is too early to be happy......

For the next few days, Hinata Yunchuan was guarding the laboratory.

Except for going to the toilet, he hardly leaves the lab.

As long as Hinata Shinichi has an adverse reaction, Hinata Yunchuan can be suppressed with drugs as soon as possible, or treated with other methods...... All in all, nothing was a big deal.

Samples are taken every two days to test the cells, and the erosion is not serious, much slower than the erosion rate of Hinata's own cells transplanted to the test subjects before, but through the exchange of substances between blood and the original cells, it coexists very harmoniously......

"Aha~"

Shinichi Hinata got out of bed and underwent routine rehab training.

Because he broke his leg for a short time, the phenomenon of phantom limbs has not disappeared, and he quickly adapted to his new legs, although it is difficult to run and jump, but he can walk normally without crutches~

Orochimaru is preparing for Sarutobi Shinnosuke's experiment, and Hinata Yunchuan also has to rush over to be an assistant, because it includes internal organ transplantation, it is much more difficult and time-consuming to replace the original two waists and a liver.

After all, the two waists cannot be replaced at the same time, at least after confirming that the kidney can be used before changing to the next ...... After all, Konoha doesn't have dialysis or anything like that right now.

While ninjas can do it, humans are not machines and can't operate twenty-four hours a day.

This mission is quite important.

Let's not talk about whether the patient is the leader of the first detachment of the dark department, or the son of the third generation of Hokage......

If it fails, Sarutobi Konohamaru will be gone~

……

……

Five months later, the surgical replacement of Konohamamaru's father was completed, and the person had already woken up, basically confirming that there were no sequelae, but he still needed to be hospitalized for observation for a period of time.

The follow-up care belongs to the Orochimaru, and Hinata Yunchuan as an assistant, with the discharge of Hinata Shinichi has been liberated from this mission, it is the norm to go to the research institute once every two or three days, and he has secretly begun to prepare for his own cell transplant.

When dealing with Hinata, the cell fluid was already prepared.

The next step is to allow these cells to fuse with their bodies and assimilate them...... Instead of replacing part of one's own body with an experimental subject, as was the case with the first two.

The risk factor is higher, but amputation is not necessary.

Moreover, once successful, the whole body will gain some of the ability to transplant cells, which was used in the previous first-generation cell experiments, and more things are needed.

Therefore, Hinata Yunchuan stayed in the laboratory as soon as he was free, prepared the drugs and catalytic liquid for his experiments, and started the transplant after getting out of Sarutobi Shinnosuke's side.

After that, he studied the group and inlaid two reincarnation eyes on his arms.

Although it is really ugly, you can wait until you run out to find another way to pull it out......

……

On this day, Hinata Yunchuan was about to leave the research institute when he was stopped by Orochimaru.

"Yun Chuan, I have something to tell you~"

"Teacher, please speak."

Orochimaru grinned, "I'm going out for a while, during this time, I hope you can take good care of Shinnosuke, don't let this guy die, otherwise the three generations won't let me go~"

“…… I do my best, teacher. ”

"In addition, I accepted a new student, so I'll introduce you to you tonight, it's a very cute girl~"

"Okay, teacher."

"So, tonight at seven o'clock Ichiraku ramen~"

"Understood."

Hinata Yunchuan nodded and watched Orochimaru leave.

Compared with when he first accepted himself as a student, Orochimaru has spent a lot less time in Konoha, which proves that Orochimaru has been hiding outside with himself and Tuan to open a laboratory~

And the red bean graduated...... This period can also be right.

As for why you don't let yourself know, most of the years of research on sealing techniques are related to the caged bird on your head, either because you are worried that it will not be easy to control, or you are worried about being controlled by others.

But that's not a bad thing, at least in Konoha's laboratory, which was basically inherited by himself.

As for the other research that Orochimaru secretly conducted~

We'll always know when the time comes.

After checking the various instruments and confirming that there is nothing wrong, Hinata Yunchuan said goodbye to Sarutobi Shinnosuke who was lying on the bed.

"Senior, see you tomorrow~"

"Well, I'll see you tomorrow."