Chapter – 810 For the Rinnegan

After Gaara was convinced, Kuroto sent him back and brought Karin to his Laboratory.

While making preparations for the surgery, Kuroto once again asked Karin, "Have you really thought it through? Because once we start there is no going back."

Karin nodded, "Yes. You have given me another life, currently, whatever I am, you are the reason Kuroto-sama. Being useful to you is my dream, even if that means death for me."

Hearing Karin's words, Kuroto stopped what he was doing and looked at the girl for a while. Her expression was clearly telling that she was dead serious. 'Since that's the case, I won't question her determination.' He thought, and nodded, "In that case, let's start."

"Yes!" said Karin as she lay down on the operating table.

After making all the preparations, Kuroto walked beside the operating table, and spoke, "Firstly, I will carry out a basic physical examination of your body to make sure that your body doesn't have any abnormal condition. Once I make sure that everything is fine, I will conduct an eye implantation surgery."

"Eye implantation?" muttered Karin, and asked, "Does that mean today you are going to start the fusion of eyes?"

"That's correct." Nodded Kuroto, and explained, "I have chosen an orthodox method of fusion, and this method requires a lot of time. The sooner the operation is performed, the better."

Based on Kuroto's understanding, there are several methods that he can choose, but in his opinion, in those methods, there are too many uncertainties, and currently, Kuroto is not looking for uncertainties, so the most orthodox method is the best, and the safest.

Besides, Karin doesn't have any experience using the Eternal Mangekyou Sharingan, so asking her to use the other methods will be very dangerous for her.

"I see." Muttered Karin.

Kuroto continued, "As per my calculations, this entire fusion process should take several months at the very least. But considering your special physique, this time may be shortened. Regardless, you'll have to be very careful the entire time, because a little carelessness might lead to the destruction of these eyes and your death."

Karin became a little nervous, and asked, "What do I need to take care of?"

Kuroto answered, "For one, your daily training will stop, and even movement will be restricted. Second, you won't be seeing anything until the fusion is completed. And thirdly, you might have to endure severe pain for the next few months."

Karin said with a smile, "As long as I can eat, and sleep I will be able to endure anything."

"Since you are prepared, we will start." Said Kuroto as he approached the operation table.

While carrying out a comprehensive physical examination, Kuroto asked Karin, "By the way, do you know why Gaara wanted to take your place?"

Karin nodded with a smile, "He wants to protect me."

"So you know the reason." Muttered Kuroto, not so surprised.

Karin snorted, "Gaara is stupid. And his intentions are easy to see through."

"And what do you think about his intentions?" asked Kuroto.

"His intention of wanting to protect me makes me happy, however, nothing would have changed my mind." Answered Karin.

Kuroto was slightly surprised by Karin's response but chose to remain silent.

After the physical examination was completed, Kuroto confirmed that Karin's physical state was perfectly all right. Her body seems to be ready to act as the facilitator for the fusion of the two pairs of Eternal Mangekyou Sharingan into the Rinnegan.

Since everything appeared to be perfectly fine, without any hesitation, Kuroto took out the other pair of Eternal Mangekyou Sharingan, and said, "Now, I will place the other pair of eyes in your eye sockets, be ready."

Karin nodded, "Hmm." Trying to appear normal, but it was obvious that she was extremely nervous.

Kuroto caressed her head, to comfort her, and said, "Take deep breaths, you'll be all right."

She took a few deep breaths as per his instruction, then said, "I am fine now, please start Kuroto-sama!"

Kuroto nodded with a smile, "All right." And began the operation.

Since he had done something similar a long time ago, doing it again wasn't so difficult for him, and soon, both the pair of eyes were layered over each other.

Feeling that her eyesockets were too crowded, Karin said in discomfort, "My eyes are swollen, I feel that they might tear apart."

Kuroto reassured, "Don't worry, they won't." Then he injected the fusion agent into her eye sockets while explaining, "I have injected the fusion agent to start the fusion, you'll have to endure this state for the next few days as the fusion agent acts."

"I… I see." As she was about to nod, suddenly, her body started to shake, she curled up, and said in a painful tone, "Kuroto-sama… my… head… my head is hurting too much!"

Kuroto immediately activated his Byakugan and observed Karin's head.

As he looked at Karin with his Byakugan, he saw her Chakra draining rapidly. And it wasn't just draining, it was reacting violently and distorting.

Kuroto knew that this was bad, and immediately injected more Fusion agents.

With the assistance of the Fusion Agent, Karin's state stabilized to some extent, and she started taking deep breaths.

Kuroto asked, "How do you feel now?"

Karin replied weakly, "I feel like my head is burning… it's… too painful!"

Kuroto had predicted that such a situation may arise, however, he didn't think that it would be so bad.

"Now it seems that even if it's Karin, things will not be easy," muttered Kuroto and started to think of a solution that he could use.

Soon, he had a solution in mind, "I suppose that is the only solution."

The solution is derived from Nagato's example.

Initially, Rinnegan drained Nagato to the point that he had become shriveled and old. However, this all changed when Nagato implanted Shodaime Hokage's cells, not only did Nagato return to normal, but he managed to gain better control over Rinnegan.

So, the solution is Hashirama's Cells. Kuroto will have to use first Hokage's cells.

However, the problem is, that Karin's situation is somewhat different from Nagato's.

When Nagato implanted the Hashirama Cells, he already had Rinnegan, and Gedo Mazo as well, so he was able to suppress those cells and fully fuse them in his body.

Unlike Nagato, Karin can't do this, as she is constantly drained by the two pairs of Eternal Mangekyou Sharingan. It's not impossible, however, it's incredibly difficult, so Kuroto has to think of a way around it.

"What to do?" he muttered, a little unsure of what approach he could use.

After a while of ragging his brain, Kuroto suddenly had an idea, "That's it!"

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