The Discovery of the Curse Seal

Monday afternoon–Sealing Jutsu Office–Ninja Academy

Since Kushina had gone to the classroom to supervise the students practising their rune drawings, Natsuhiko was alone in the office.

He was sitting at his desk, humming a tune while repairing the combat power detector that had been damaged by Might Duy.

He seemed to be in a good mood.

After all, he had gained a lot over the past few days from that Root ninja, obtaining many useful things.

The first and foremost was the genjutsu he referred to as "Kotoamatsukami."(A powerful yet a subtle mind controlling Jutsu)

After the relentless efforts of infant clones, No. 2 had finally managed to roughly decode this technique.

Unlike ordinary genjutsu that create illusions in the opponent's mind, this technique directly influenced emotions through chakra, which greatly inspired Natsuhiko.

After all, chakra is a mixture of spiritual and physical energy in a one-to-one ratio.

Naturally, there is a very close relationship between emotions and the nature of chakra.

For instance, Tobirama Senju discovered that when members of the Uchiha clan lose something important, their intense hatred causes a special chakra to surge in their brains, affecting their optic nerves and causing changes in their eyes.

This is what is known as the "eyes that reflect the soul" — the Sharingan.

Moreover, this chakra, once it appears, also influences the individual's spirit, causing significant personality changes and leading them down a dark path.

As for why the Second Hokage understood the physiological principles of the Sharingan so well, we won't delve into that here.

So, when that Root ninja foolishly broke into Natsuhiko's house again in the middle of the night and was caught by the defence barrier.

Natsuhiko decided to test his theories on him.

He threw the Root ninja into a box reinforced with sealing techniques, making him play cards in the terror of being buried in natto.

Then, Natsuhiko studied the chakra extracted from the duel-disk game machine to explore the relationship between emotions and chakra nature.

As expected, under the pressure of the natto hell, the Root ninja's chakra underwent significant changes.

If the root ninja was the protagonist, he would have awakened the Sharingan or unleashed the Nine-Tails.

Unfortunately, this guy didn't have the protagonist's aura. He remained in extreme fear for half a day until his chakra was exhausted.

Nevertheless, Natsuhiko obtained a lot of interesting data and also got rid of the large pile of natto secretly bought by No. 3.

It was a win-win situation.

Although he hadn't yet figured out the practical use of this research, he could modify the equipment and sell it at a high price to the Uchiha clan later.

Let them open their eyes too.

Anyway, the machine was soaked in natto, so Natsuhiko didn't dare to take it out of the storage scroll.

Finally, he got an unexpected surprise from the Root ninja.

He discovered a type of rune technique in the ninja's chakra that he had never seen before.

Based on his memories of the original work, he quickly deduced that this must be the notorious curse seal technique.

It seemed that besides the curse seal marks on the surface of the body, there were also hidden curse sealing Jutsu in the chakra within.

Curse seals, being the most secretive and evil among sealing techniques, were rarely documented and mostly passed down orally, so Natsuhiko had little knowledge in this area.

Now that he had encountered it, he wouldn't miss the chance to study it.

Natsuhiko observed that unlike many sealing jutsus that simply absorb the opponent's chakra, the curse sealing jutsu was directly rooted in the soul. When the host refined chakra, it incorporated its information, forming new curse seal techniques, achieving self-replication.

This reminded him of a familiar concept — a virus.

Like a virus, it enters from the outside, parasitizes the body, and uses the body's resources to replicate itself.

It can lurk within the body without detection or expressing itself, causing various adverse reactions or even death.

So, a curse seal is essentially a chakra virus?

It seemed quite reasonable.

Since runes are a programming language for chakra, it's not surprising that a curse seal is a chakra virus.

So, is this chakra virus a computer virus or a biological virus?

Natsuhiko quickly realised that the curse seal technique would be crucial for his future research, possibly altering some of his plans.

It seemed there were more things to study now.

Natsuhiko smiled wryly; this was truly a luxurious problem to have.

...

At the end of the school day, just as Natsuhiko finished repairing the combat power detector, he heard several footsteps and voices outside the door.

It sounded like they were arguing.

Then the office door opened, and six members of the research group entered one after another.

Kurenai was fuming, while Rin, Asuma, and Ebisu looked helpless, and Guy was as energetic as ever.

Only Obito walked in last, with his head hanging low.

Well, it seemed our dear Obito had caused trouble again.

But Natsuhiko didn't mind. After putting away the combat power detector, he said:

"I've placed the training uniforms and meridian scrolls on the table over there. Go change your clothes first."

However, as soon as he finished speaking, only Guy happily walked over to pick up a training uniform, while the others looked reluctant.

"Sensei's Sensei!"

Kurenai quickly ran up to Natsuhiko, looking up at him with a cute expression:

"Sensei, can we change the place for our activities?"

"Oh? Is the training ground behind the school building not good?" Natsuhiko asked casually.

Kurenai got angry at this: "It's all because of that idiot Obito who told others about our activities there! Now everyone says they want to come and watch after school!"

Hearing this, Obito shrank his neck, feeling embarrassed.

He now deeply realised his mistake.

After all, this meant that Rin's tight-fitting outfit would be seen by everyone.

Kurenai felt like dying at the thought of everyone seeing her in a tight-fitting outfit.

So she pleaded, "Can we change the place, please, sensei?"

Everyone else looked at Natsuhiko with expectant eyes.

Except for Guy, who said he'd be more excited with an audience.

Natsuhiko stroked his chin and pondered, creating a tense atmosphere.

Then he slowly said:

"A person's value lies in their talent, not their clothing."

"Even if wearing this training uniform attracts ridicule, as long as it enhances our abilities, what does it matter?"

"One day, ten days, they might still laugh."

"But what about after one hundred days, two hundred days? By then, I guarantee they won't be able to laugh anymore."

"Because we will be stronger?" Asuma asked expectantly.

"No, because by then, this training uniform will be standard in the school."

Everyone fell over!

Alright.

That would indeed stop everyone from laughing.

But we won't be able to laugh either!

Seeing everyone's speechless faces, Natsuhiko clapped his hands and said:

"Alright, alright, let's do this. I'll wear the training uniform too this time, so you won't have any more complaints."

Everyone was shocked and looked at each other.

They always thought that the design of the training uniform had a bit of Natsuhiko's eccentric taste besides its functional purpose.

But now, he volunteered to wear the training uniform.

Did they misunderstand their Sensei?

Feeling both guilty and sympathetic, they thought maybe they had wronged Natsuhiko.

Except for Guy, everyone felt remorseful and pitied their teacher's poor fashion sense, equating it to Might Guy and his father.

Since Natsuhiko was setting an example, they had no more objections and each took a training uniform.

Kurenai and Rin went to the partitioned area as usual, while the boys began changing clothes.

But after changing, they noticed Natsuhiko was still standing there, not moving. Curious, Asuma asked:

"Teacher, aren't you going to change into the training uniform?"

Yahiko smiled:

"No rush, I'm already wearing it underneath."

He then unbuttoned his white shirt, revealing a black tight-fitting suit underneath.

On the chest was a bat symbol...

(End of chapter)

Chapter 106 is up on Patreon.

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