Naruto: The man is in the Senju, but the Sharingan

"Izuna-chan, aren't you curious about what Tobirama-san is researching recently? I haven't seen him for a long time..." Ever since Kawarama and Itama got used to the life in the alliance, Senju Kagamikawa no longer followed them every day. Instead, he stayed with Uchiha Izuna these days.

But I haven’t seen Senju Tobirama for several days—Senju Tobirama has not even left the laboratory.

Therefore, Senju Jingchuan has been a little worried these days.

Apart from anything else, looking at Senju Tobirama's work and rest schedule, Senju Kagamikawa was really worried that Senju Tobirama would die suddenly -

Although he knew that his brother Tobirama would definitely know his limits.

However, when he thought of the desperate attitude that Senju Tobirama had shown in his previous research, Senju Kagawa was really a little worried this time.

After Uchiha Izuna heard what Senju Kagamikawa said, he curled his lips, with some inexplicable emotions in his tone:

"Kamigawa, are you worried about that bastard Tobirama Senju?"

Uchiha Izuna was not worried about Senju Tobirama at all. After all, Uchiha Izuna and Senju Tobirama were mortal enemies from the very beginning.

Although the relationship between Senju Tobirama and Uchiha Izuna has eased a lot now, why would Uchiha Izuna worry about that white-haired bastard for no reason?

If it weren't for the Thousand Hands Mirror River...

Then, Senju Kagamikawa and Uchiha Izuna came to the outside of Senju Tobirama's laboratory.

In short... maybe it might affect Senju Tobirama's experiment?

Senju Kagamikawa frowned and thought seriously. After weighing the pros and cons in his mind for a long time, he decided to pull Senju Tobirama out and have a good sleep first.

It’s not like Kagamikawa Senju hadn’t stayed in the laboratory with Tobirama Senju before, but with Kagamikawa Senju’s urging, Tobirama Senju would at least come out to rest.

But in the past few days, Senju Kagamikawa has never seen Senju Tobirama step out of the laboratory, and it is naturally impossible for Senju Tobirama to sleep in the laboratory - so, excluding all impossibilities, there is only one truth - Senju Tobirama has basically not slept a wink in the past few days!

What kind of experiments and research could make Tobirama Senju, a man who has always been very rational, choose to stay up all night for several days?

Senju Kagawa became angrier the more he thought about it. No matter what, Senju Tobirama couldn't be so careless about his own body, right?

Then, Senju Kagamikawa angrily placed his hand on the door of the laboratory and decided to knock on the door to remind Senju Tobirama. If Senju Tobirama did not open the door, Senju Kagamikawa would use the "Master Key" tool in the Tietie Mall to open the door.

At the moment when Senju Kagawa placed his hand on the door—

The door opened.

Inside the door was Senju Tobirama, who looked a little tired.

Tobirama Senju was still wearing the clothes he wore when he entered the laboratory a few days ago. After several sleepless nights, Tobirama Senju now looked a little unkempt, and had a bit of the air of a mad scientist.

"Brother Tobirama, what have you been researching these days? Why don't you step out of the laboratory?" Senju Kagawa said angrily, with his arms folded over his chest.

When Senju Tobirama raised his eyes, he saw Senju Kagamikawa with a very bad expression in front of him. Then he saw Uchiha Izuna who was also standing next to Senju Kagamikawa with his arms folded. Although Uchiha Izuna's expression was still as cold as usual towards him, how could Uchiha Izuna, who was very familiar with this mortal enemy, not see the gloating in his eyes?

[It's over...] Senju Tobirama thought in his heart. He was indeed too busy these days, wanting to master that ninjutsu so badly that he neglected sleep and food.

However, Senju Tobirama knew that Senju Kagawa must be very angry now, and it was not easy to coax Senju Kagawa - after all, Senju Kagawa usually had a good temper.

"Little brother, wait, listen to my explanation first..." Senju Tobirama gave Senju Kagawa a flattering smile.

In the past, Senju Tobirama had always been very careful about his image in front of his mortal enemy Uchiha Izuna, and would never show himself as weak in front of Uchiha Izuna - but things are different now.

If Senju Tobirama doesn't explain to Senju Kagawa immediately...

Senju Jingchuan looks like he’s about to get angry, okay?

If it appeared in the comics, there might be a large flame burning behind Senju Kagamikawa, and there would be several fire-breathing dragons drawn beside him...

When Senju Kagawa saw that Senju Tobirama wanted to explain, he would naturally give Senju Tobirama a chance to explain. After all, he was not an unreasonable person.

However, no matter what research he is doing, it cannot offset the sin of Senju Tobirama for not taking care of his body this time.

Then Senju Tobirama explained at a very fast pace what ninjutsu he had been studying these days.

Senju Kagamigawa and Uchiha Izumina were both stunned when they heard the ninjutsu that Senju Tobirama mentioned.

It's just too shocking.

Uchiha Izuna was truly shocked by this ninjutsu, while Senju Kagamikawa didn't know what to say.

Because the name of this ninjutsu is - Impure World Reincarnation Technique.

Senju Kagamikawa had already known through the system that Senju Tobirama would develop this ninjutsu in the future, but he didn't expect it to happen so soon.

"Second Senju brother... you are not lying, are you? How can this kind of ninjutsu be researched out?" Uchiha Izuna glanced at Senju Tobirama suspiciously, with confusion and disbelief in his eyes.

Senju Tobirama was too lazy to explain in detail to Uchiha Izuna, and just asked back:

"What do you say?"

Uchiha Izuna was silent. Although he had always disliked Senju Tobirama, he knew that Senju Tobirama was not the kind of person who would make false statements or exaggerate...

As long as Senju Tobirama said this, it would prove that this ninjutsu has been researched and is definitely not just his imagination.

But if that's the case...

The first thing Uchiha Izuna thought of was himself, Uchiha Madara’s three brothers and their mother.

If this is true... maybe this year, Uchiha Izuna will be able to see his deceased relatives?

Senju Kagawa was silent because he knew the conditions for Impure World Reincarnation.

For people of this era, perhaps this condition is a bit harsh, after all, it involves using the flesh and blood of a deceased person and a living sacrifice.

To some extent, the Impure World Reincarnation Technique can be considered a truly forbidden technique. After all, in order to "resurrect" a loved one, one has to sacrifice another person... or even dig the body of one's loved one out of the grave and take out some flesh and blood?

Uchiha Izuna was no fool, and after confirming the authenticity of the Impure World Reincarnation Technique, he directly asked Senju Tobirama:

"So, what are the conditions for performing this technique?"