Naruto: The Medical Shinobi

"Okay, let's create this seal now." Ryu said.

- [Temporary Enhance] running on [Fast Thinking] and [Parallel Thinking]

- [Overclocking] enabled

- Basic functions of seal identified:

Absorption of chakra

Storage of Chakra

Compression of chakra

Delivery of chakra

- Additional functions demanded: Safety protocols and trigger mechanisms for said safety protocols.

Ryu spoke, "I think this will do."

With that thought, his subconscious took over and started working on the assignment on the screen.

- Designing a seal to absorb and store chakra.

Progress: 1%...20%...

"It's taking longer this time. Maybe it's more complex than I thought," Ryu thought. 

His mind, both conscious and subconscious, both of which were trained for higher-level programming in the past life and Fuinjutsu in this life, was working while overclocked at this moment but was still not as fast as it was before.

Ryu thought, "Maybe I have reached that limit of complexity and overclocking, the limit where the seals are now so complex that they need more time from now on. Akatsuki and Otsutsuki are both not active at the moment, so it's not a big deal now."

- Progress: 100%

- Creating a seal for compression of stored chakra

This went on for another 15 minutes until all seals were ready. Dan and Ryu watched the seal write itself on a big screen. For Dan, the time was running in real time, but for Ryu's subconscious mind, hours had passed since his mind was working many times faster while going through all his knowledge and piecing together the code or seal for this seal he required.

- [Chakra Backup Seal] Complete.

- Testing it for errors

- No errors found

[Chakra Backup Seal]: Can store the chakra of an individual in the seal for replenishing his chakra reserves later. Efficiency is dropped when chakra reserves are greater than 25 units. Efficiency is dropped when the chakra is stored and used by different persons. Has hidden safety protocols.

Ryu said, "I am done. We need to test it first before we start working on the second seal."

"Did you add a safety protocol?" Dan asked.

"Yes, I did," Ryu replied.

-[Overclocking] disabled

-[Genjutsu: Mind Palace Projection] deactivated.

They found themselves in their room again. 

Let's write this seal now. Ryu took the fuinjutsu seal paper and special ink and started writing the seal. In about half an hour, he completed the physical seal. Ryu double-checked its accuracy with his parallel mind.

- No errors found

"Let's test it," Dan said.

Ryu handed it over and said, "It is activated by just one hand seal. Rat seal for storing chakra and monkey seal for having it back."

"Clever, rats like to hoard things, and monkeys share in their families." Dan said.

Dan then placed the seal on his chest and performed Rat Seal, and the seal started absorbing his chakra. After some time, it stopped.

"It can store 20% of my full chakra," Dan said.

Ryu replied, "For maximum efficiency, your chakra must be less than 20% of your full chakra when using it to replenish it, and this percentage could be different for everyone."

"So let's burn out some chakra and test it below the 20% then," Dan replied.

Dan practiced some of his wind jutsu for 20 minutes straight and burnt his remaining chakra so that it was just at the required level for testing this seal.

After that, he tested the seal replenish operation using Monkey Seal. 

"It's working. I can feel my chakra replenishing," Dan confirmed.

In about a few minutes, Dan replied, "My chakra is at almost 40%. The seal works."

Ryu then said, "Okay, it works. what to do with it."

"Sell it off course. You need money, right? With this and other seals, it will sell like hot cakes. Grandmasters will go in a bidding war for these seals."

Dan knew Ryu was worried. He assured him and said, "Don't worry. Like I said, we will ban the sale of the [Healing Seal] to Root Ninjas, and we can sell the [Chakra Backup Seal] ourselves after encrypting it, but it will reduce our profit margins and will increase the load on us, but it will be off their hands. We need to come up with a different solution in the long run."

Ryu thought about it and then asked, "How about we hire some sealmasters to make the seals for us under our supervision?"

Dan replied, "That won't do; it will only give the Root-ANBU a chance to enter our home. Even if we check them, we won't be safe."

Ryu thought, 'He does not have Shisui's Mangekyo Sharingan right now, but he has other means to manipulate anyone that we hire. I will be digging someone's grave if I do that.'

Ryu replied, "You are right. Then we should keep the [Chakra Backup Seal] to ourselves and sell only the [Healing Seal] to other grandmasters. The other grandmasters will be unhappy, but even they cannot do anything to us if we keep the seal for ourselves."

Dan said, "Yes, for the other grandmasters, we are the golden egg-laying goose. They will not say anything. Root will be able to buy a few encrypted [Healing seal] from the market, but not on a massive scale. Besides, the [Healing Seal] cannot be used to harm anyone or us directly, and you will also be putting a failsafe in the healing seal as well. Right?"

Ryu smiled and said, "Most definitely."

- [Overclocking] enabled

- [Genjutsu: Mind Palace Projection] activated.

Preparing layout for Healing Seal:

- Copying [Chakra Backup Seal]

- Identifying parts that need modifications

- Progress: 1%… 20%... 100%

- [Healing Seal] complete

[Healing Seal]: Can store the healing chakra of a medical ninja and use it as an alternative to Healing Hand Jutsu. The maximum healing time that can be stored is 10 minutes. Does not work on serious injuries or poisons. Have the same healing limitations as that of Healing Hand Jutsu. Has hidden safety protocols. 

In about 5 minutes in real time, the seal was ready.

[Overclocking] disabled

[Genjutsu: Mind Palace Projection] deactivated.

"Ok, it's done. But we cannot test this one on us," Ryu said while rubbing his forehead.

Dan noticed his discomfort and said, "Do not push yourself. I know that your method puts stress on your mind."

Ryu replied, "Two times a day is my limit. Three if I want to take risks."

Dan said, "You should stick to one then and do not do this every day."

Dan thought, 'Maybe it was a good idea to not teach him shadow clone jutsu.'

Ryu replied, "Okay, grandpa."

Dan said, "Right, let's go meet Yuki. We need to talk to her anyway." 

"Ok, I can't wait to meet her too," Ryu said.

They quickly packed up and reinforced the defensive barriers around their home, ensuring extra protection, before heading straight to her hospital.

They reached the hospital and asked for her, but her assistant, Isao, told them that she had gone to visit her orphanage.

Isao asked, "You haven't been there after you met me, have you?"

Ryu replied, "No, I didn't. I was so busy. I didn't need to. I was not close with the kids there anyway. Just Mikasa, and she is not there now."

Dan replied, "So she was adopted before you."

Ryu's expression turned sour, and he replied, "Yes, but not in the way you are thinking." 

Ryu then told him about Mikasa Watanabe, the girl inducted into the Root ANBU who was also in with him at the orphanage.

Dan told him, "I am sorry to hear about your friend."

Ryu replied, "She was like a sister to me. I don't even know if she is alive right now. She is the reason why I don't want my seal in the hands of Root, at least not the offensive ones." Ryu said.

"I was so powerless then," he added.

Dan replied, "Yes, you were powerless and dying. But that was a blessing in disguise. That saved you from the Root-division then. Otherwise they would surely have taken you."

Ryu said, "Maybe you are right. From the beginning, this must have been the plan for me." 

He added, "But I am not powerless now. And I am going to get stronger, and I am sure I will someday be in the crosshairs of the Root and that crossed-chin bastard, as our ideals do not match. The day it happens, I will rain down hell on that freak."

He meant every word of it. He knew it's too late for Mikasa, and even if he asks Hiruzen to save her, it won't be. But he holds this grudge, and unlucky for some people, he remembers their scent and figure and their voice even if their faces were hidden.

That's the thing with eidetic memory: good or bad memories, nothing will be forgotten. In that aspect, this ability was cursed.

As they walked towards the market, Dan suggested, "Maybe we should pack some lunch."

"Yes, kids would love some unhealthy food for a change," Ryu said.

"I hope Yuki would love it too. If not, I'll be the one in trouble," Dan said with a chuckle.

"Just say it was my idea," Ryu replied.

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