It was a long time later that people discovered that hair could not be marked by Flying Thunder God.

That day the young man disappeared out of thin air, and Tobirama studied almost all the time and space ninjutsu he could find, but found nothing.

"Maybe it was just a dream?"

The eldest brother, Hashirama Senju, even said such infuriating words.

But to this day, even though the truth is slowly being revealed in Tobirama's laboratory, there is no longer that irritating and thick-skinned big brother standing by to say irrelevant but infuriating words.

"Big brother..."

Tobirama Senju, the second Hokage.

He wore a Hokage hat and a divine robe, but there was something indescribable about him that made him feel awkward.

The war was over, and thirty was no longer the end of life. He was in the prime of his life, but he had to wait until his death - it had nothing to do with age, it was just a matter of hair color.

The tombstone of Senju Hashirama is very different from the real person. The eldest brother is always tall and strong, always majestic and reliable, and can always resolve any crisis with his fists and smile.

"Wood Release, a power so strong that it almost doesn't belong to this world..."

The tombstone is just of normal size, as if Hashirama once mentioned it casually. Perhaps he himself did not expect that he would die young.

The war has started again, and few people come here to worship. The god of the ninja world, Senju Hashirama, should be peaceful here.

Green moss crawled on the tombstone, eating away irregular pits around it. Water and wind accumulated inside, shining like the finest jade.

"Everything powerful has already been marked with a price."

The reason why Hashirama's cells have only been studied now is largely due to Hashirama's powerful strength and terrifying reputation during his lifetime.

The world is changing, for better and for worse. When small changes pile up, they become turbulence.

The war came earlier than Tobirama expected. Almost as soon as Hashirama died, the ninja world changed.

The dim morning light hurt the man's eyes. How long will this last? Born in the war era, he could not take his last breath in peace.

Hashirama is both lucky and unlucky.

The first researcher to start studying Hashirama's cells was not someone else, but Hashirama's younger brother, Tobirama Senju.

"Master Tobirama, it's getting late."

The black-haired boy appeared behind Tobirama at some point, and next to him stood a boy of the same age who was as thin and small as a monkey.

"How was the experiment?"

Tobirama knew what the boy was talking about. As the Hokage, he would definitely be at the forefront.

But his own fighting style is flexible and ever-changing. If he only follows the template of his elder brother Hashirama, it might not be worth the effort. Instead, sneak attacks, infiltrations and assassinations have become the second generation's easy tricks.

Everything was just like when Hashirama Senju was still alive, seemingly in order but actually a mess.

"First generation...Hashirama's cells completely lose their activity after a certain number of divisions."

"Jing said that this might be because the number of splits has reached its limit."

The death of Hashirama Senju was bizarre. The legendary Hashirama cells can make the owner immortal. Even if it is a fatal injury, it can be restored to its original state after a period of time.

Although I have never actually tried it, I could cut off the man's entire head and put it back together - maybe the head that fell off would have grown into a complete body again.

"The maximum lifespan of a human is 120 years."

Tobirama held a kunai in his hand. It looked a bit old, the metal still kept its bright luster, but the bandage on the handle had already turned a little yellow.

"But Hashirama's cells have a stronger ability to divide. Is this due to the Wood Release Chakra? Or..."

Even if a normal person is injured, their cells will not divide as quickly as Hashirama's cells. Instead, they will remain at an average level.

But Hashirama Senju would heal quickly after only a little damage.

There is still so much about cells that they don't know.

"Perhaps this is also proof of Big Brother's existence as a human being."

When Tobirama said this, his voice was very low, and the two boys beside him didn't hear it clearly. They pricked up their ears and asked timidly: "Master Tobirama? What did you just say?"

The black-haired boy raised his head and met Tobirama's red eyes.

There is always stagnant water there, the boy thought.

Lord Tobirama was always restrained and self-possessed, and he rarely showed any emotion after Lord Hashirama's death.

But now, those eyes were wide open. The dead water was shaking, and the ripples flowed from the eyes to the world.

"I'll leave everything to you from now on. Danzo, monkey."

After that, it naturally refers to this assassination mission.

Danzo Shimura and Hiruzen Sarutobi naturally have the ability to cooperate to complete the mission, but Tobirama has always been cautious - almost to the point of paranoia and madness.

He was unwilling to let go of anything he could grasp, even if it suffocated him.

If he just loosened his grip a little, everything he had, everything left behind by those who had passed away, would seem to flow like a stream to a distant place he could not see.

But today, Tobirama only left these words and disappeared without a trace.

Danzo Shimura and Hiruzen Sarutobi saw for the first time their teacher use Flying Thunder God so quickly.

The speed of forming seals today is more than three times faster than usual.

"Did something happen?"

Danzo was confused and looked from the open space where Tobirama had stood to Sarutobi Hiruzen.

The latter was only wearing a white vest, with his dark skin exposed, adding a sense of inappropriate comedy.

"Who knows?"

The little monkey shrugged, and really looked like a monkey swinging on vines in the jungle.

He folded his hands behind his head and left his back to Danzo.

"For better or for worse..."

"As long as the teacher is safe, isn't that enough for us?"

Danzo no longer hesitated after hearing this. He followed Sarutobi Hiruzen in two or three steps and uttered some words with a hint of boyish immaturity:

"That's true. The teacher must have his own plans."

"All we can do now is to complete the task well."

Tobirama didn't think he was a thoughtful person. Even if he was, it was probably because of this world and his unreliable brother.

Once involved in something important to them, some of their characteristics will be revealed.

He even felt that he was a madman like his elder brother Hashirama.

Make unrealistic choices for something that seems unrealistic.

The chakra that can be separated to sense Flying Thunder God is the best evidence.

He hated to have his hopes dashed, so from that day on, the mark of the Flying Thunder God never appeared again, but instead, along with the kunai, rested in Tobirama's sleeve.

If he sensed it, it was most likely him - apart from that man, there should be no other living person in the world with the mark of the Flying Thunder God.

When Uchiha Madara took his younger brother Izuna away from Konoha, he had already used both soft and hard tactics, threatening to remove the Flying Thunder God Mark from Izuna.

As for the others, they have already become graves or turned into mud.

The separated chakra trembled slightly, affecting Tobirama's heartbeat and pulling at the man's soul.

It was not just a blink of an eye, it was several years that flew by, but it was not just a passing moment.

Suffering and blood are engraved in the soul of every person in this world, slowing down the passing time infinitely. On a quiet night filled with loneliness, time will seem to stop and replay over and over again.

He had a hard time these years, but he had grown a lot. The man was eager to know if that person was the same as himself.

Grass, water, morning light, sun...

The breeze, the singing of birds, the clatter of deer hooves, and the breathing of humans.

Tobirama finally saw the person he wanted to see.

The young man was dressed in white, lying in the grass, his breathing filled with fear and relief at having survived a disaster.

But all this came to an abrupt end with his appearance.

The wounds and blood on the boy's body were still fresh, and were the appearance that appeared repeatedly in Zaihei's dreams.

Senju Tobirama did not get the answer he wanted, but got the expected result.

The young man in white still looked the same as he did twelve years ago. He came here just after he disappeared that day.

His twelve years, their twelve years, were just a blink of an eye for Neji - not even a blink of an eye.

Tobirama looked at Neji, their red and white eyes meeting.

Empty glares - Tobirama once thought that those glares were supposed to be like this, filled with emotions that Tobirama could understand at a glance.

My life is over.

But the boy was not in a hurry. He still lay on the ground without any attempt to escape.

Neji opened his lips slightly, and Tobirama thought that the other party was going to say something to reverse the situation - after all, in Neji's eyes, he should want to kill him.

But without any warning, a mouthful of blood gushed out from the bloodless mouth.

Then came the second bite, and the third bite... Tobirama watched the boy close his eyes and then lose consciousness.

? What's happening here?

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