Naruto: The Strongest Sage.

After Orochimaru left, Aoba walked out of the room, only to see Karin peeking through the crack of the door in the next room.

"Well, don't worry, the snake is gone."

"Oh, that's great. I'm afraid of snakes. It feels so gross."

"Really? Actually, I feel the same way."

This is the truth. Orochimaru's snake-type ninjutsu really makes people feel physically uncomfortable.

"Okay Karin, come here and let me check you out."

"it is good."

Although Aoba is not a professional medical ninja, he did learn about this when he was under Orochimaru. He actually thought about taking the route of medical ninjutsu, which is safer.

But one reason is that the upper limit is too low, and the other is that since we have come to this world, how can we not pursue a higher level of power?

Karin is still young, and has been bitten many times, but she has a strong foundation. After a period of good food and drink, her body has recovered quickly.

Even the bite marks on his body began to fade away slowly.

"Your body is recovering very well. At this rate, you will be fine in another week. Then you can go to school."

"Go to school, I still need to go to school? Brother Aoba, I don't want to go..." Karin subconsciously started to act like a spoiled child. But Aoba directly rejected her sternly.

"Going to school is necessary. I often have to go on missions and have no time to teach you. Going to school will allow you to learn and consolidate the basic ninja knowledge. Most importantly, it will allow you to meet some companions.

Don't worry, Konoha is different from Kusagakure. The students here are pretty good. You can make new friends when you go there. This will be good for your growth."

In fact, Aoba had another reason that he didn't mention. That was that Karin was a member of the Uzumaki clan. She also had basic chakra reactions in her body. If she wasn't allowed to go to school, it would be a bit too suspicious.

As I said, Konoha is not completely safe. With the Nabekage hiding there, he needs to be careful at all times.

Letting Karin go to school openly would dispel those prying eyes. Yumi knew this reason. But Karin was still too young, and Aoba usually wouldn't explain it to her.

Compared to Karin, Yumi's health is not so optimistic.

Even after this period of recuperation, her health had stopped deteriorating. But that was all. It hadn't deteriorated, but it hadn't recovered either.

You know, Yumi is not actually that old. She is only a few years older than Aoba. She is about 24 or 25 years old.

According to the physique of the Uzumaki clan, they should be able to recover quickly. But now, they are unable to recover, which means that her life source has been consumed too much.

The grass didn't even treat her as a human being, and they bit her hard on purpose, causing her body to be almost exhausted.

"Sir, you can tell me directly. How long can I live?"

"I've already told you that you can just call me Aoba. According to the current situation, you have about two to three years left."

"That's enough. At least I can still spend the last moments with Karin."

"Don't be so pessimistic. I told you, I have a way to save you. It just takes time and involves certain risks."

"I believe in you. If the time comes, tell me. I'm willing to try, no matter how high the risk."

"I will."

Yumi's situation is actually very complicated. She was suffering from excessive consumption of life force, not from conventional injuries.

Therefore, biting Karin is totally not feasible.

Qingye has carefully studied their special physiques during this period. He originally thought that it was their blood that could heal the injuries.

But later I found out that it wasn't. At least not completely. Blood also contains a huge amount of vitality. But if it was just blood, it wouldn't be so fast.

Because blood enters the human body, it needs to be absorbed by the human body before the vitality inside can be absorbed at the same time.

The actual situation is that the moment they are bitten, the vitality in their bodies will flow out with the blood and directly flow into the body of the biter.

In this way, the effect of quickly recovering from injuries can be achieved.

However, this kind of recovery can only heal external injuries and cannot replenish the other party's life essence. Therefore, letting Yumi bite Karin is not feasible.

This is a very complicated subject. Even as a professional, Qingye couldn't figure out the mystery at once.

He deduced that biting people could only be a superficial use and absorption of vitality.

If you want to replenish Yumi's life force, you should replenish it at a deeper level. But for the time being, there is still no idea how to replenish it.

Aoba has already decided that if this path doesn't work, she will use her own path to transplant Hashirama's cells. As long as it succeeds, it will definitely be able to replenish and even strengthen her vitality.

A week later, Karin was reluctantly sent to school by Aoba.

After going on several missions in a row, Qingye finally applied for a long vacation. After that, he started his research work in the basement of his home.

Orochimaru was very efficient. Three days later, the information on the sealing technique and various experimental equipment were delivered.

To be honest, Aoba was very envious of Orochimaru's ability to never lack money or equipment.

If he were to buy these things himself, it would cost at least tens of millions, or even hundreds of millions of taels. But Orochimaru just gave them to Aoba.

Afterwards, Aoba built a basement under his house and converted it into a laboratory to advance his research.

Hashirama's cells have arrived. But there is another condition that has not been met, so it will not move for the time being.

His current research topic is still Karin.

Karin's physique is undoubtedly very practical. But Aoba is not a pervert like Kusagakure. He can't bring a little girl with him to serve as a blood bag at any time.

But he really coveted this effect. So, Qingye's idea was to extract some of Karin's vitality every once in a while and store it without affecting Karin's health, in case of emergency.

The little girl had a very strong vitality. Of course, the entire Kusagakure Village couldn't survive if she was used as a blood bag. But drawing a syringe of blood every week would basically have no effect on her.

But this involves a problem. That is what was mentioned earlier. Karin's vitality is not only in the blood, but also overflows with the blood.

And this overflowing vitality is the source of rapid recovery from injuries. What Qingye needs to do is to find a way to seal up this overflowing vitality and make it into a recovery potion.

To achieve this, medical treatment and sealing techniques are needed. This is why he asked Orochimaru for information on sealing techniques.

For most of his research, if he wants to go deeper, sealing techniques are indispensable.