The Ultra-Hardcore Teacher

Seeing Fugaku Uchiha reveal his Three Tomoe Sharingan, Hiashi Hyuga refused to be outdone and activated his Byakugan to meet his gaze.

The Hyuga Clan and the Uchiha Clan were sworn enemies. They had fought a brutal war in the late Warring States period, and the Hyuga Clan had nearly been crippled by Uchiha Madara leading the Uchiha Clan.

He had not forgotten that blood-deep grudge!

Likewise, Fugaku Uchiha held no favorable opinion of the Hyuga Clan.

"What a pity!"

Retracting his Sharingan, Fugaku Uchiha turned his gaze to Hizashi Hyuga, who still wore a Konoha forehead protector, and sighed regretfully.

He had always kept an eye on the Hyuga Clan's most outstanding figure of this generation. He understood well that, in terms of talent and strength, the younger brother, Hizashi Hyuga, was superior. Unfortunately, the Birdcage Cursed Seal had been branded onto him. Not only had it given the Byakugan a flaw and damaged his potential, but it had also dealt a severe blow to his spirit.

This man was finished. At most, he would become an Elite Jonin in the future. He could never reach Quasi-Kage Level.

As for Hiashi Hyuga...

"Heh..."

With a disdainful sneer, Fugaku Uchiha left with Uchiha Mikoto.

Hiashi Hyuga was indeed decent, but he would at most grow into a Quasi-Kage Level fighter. He could never become a True Kage Level powerhouse. Fugaku Uchiha did not even consider someone like him worth his attention.

The Hyuga Clan was destined to be trampled beneath the Uchiha!

Fugaku Uchiha's contemptuous sneer before leaving made Hiashi Hyuga's face turn livid. The veins bulging around his eyes from activating the Byakugan throbbed without stop.

The Uchiha really all deserved to die!

"What are you so smug about!"

Glaring at Fugaku Uchiha's retreating back, Senju Nawaki muttered unhappily before turning to the Shimura clansman holding the iron hook.

"Uncle, let me try too!"

After another moment of silence, the Shimura clansman handed the two-meter-long iron hook to Senju Nawaki.

Senju Nawaki had focused exclusively on taijutsu over the past few years, so his physical fitness was not weak. With Chakra reinforcing him, he could drag that heavy outer shield along, but dragging it was all he could do.

It was utterly impossible for him to lift it, not to mention that the Sealing Crystal's radiation made it difficult for him even to approach.

Next, the Elite Class students from every grade stepped forward to give it a try, gaining an even deeper understanding of Shimura Kentei's strength.

"Choza, when you're thirteen, can you have strength like his?"

Squatting on the ground and studying the heavy outer shield, Shikaku Nara asked. That level of physical fitness was truly astonishing.

"By thirteen, I probably won't be weaker than him. But I only have strength. In terms of agility and speed, I'm inferior to him. If I use the Expansion Jutsu, though, my strength can crush his."

Choza Akimichi replied while chewing beef jerky, saying that by the time he was nearly thirteen, he could possess such strength and become even stronger after using the Expansion Jutsu.

After all, the oversized steel battle axe Torifu Akimichi had forged specifically for the Super Expansion Jutsu weighed dozens of tons. In terms of pure physical strength, he could be called the greatest in the ninja world.

Of course, that was only in terms of strength. He was much weaker when it came to speed and dexterity.

"How exactly did he adapt to that thing?"

Shikaku Nara thought of another problem. He had tried it just now, and after coming within half a meter of that thing, the Chakra inside his body had begun to go out of control. Had he not retreated in time, his Chakra would have gone berserk. That was no joke.

So the question was, how had that guy adapted to the Sealing Crystal's radiation?

The others were pondering the same question. If it had only been a suit of armor and a shield, it would have been nothing unusual. They had heard that the samurai of the Land of Iron often did such things.

But once it was paired with a Sealing Crystal, it became completely different, becoming an existence nearly immune to ninjutsu.

Naturally, Shimura Kentei knew nothing of what everyone was thinking. He was currently receiving Tsunade's treatment, assisted by several doctors nearby.

The doctors from Konoha Hospital handled the fractures in the other areas, while Tsunade focused on his arms' comminuted fractures and his damaged internal organs.

It had to be said that Tsunade, possessing Senju Hashirama's Body, was truly uniquely gifted in Medical Ninjutsu. With powerful Yang Release Chakra assisting her, she had initially fused the shattered arm bones in merely an hour. They only needed continued nourishment now, and full recovery in a week would not be a problem.

"Little pervert, the hardness of your bones is very abnormal!"

Holding a fingernail-sized bone fragment and examining it, even squeezing it with her fingers, Tsunade grew even more curious about this bargain-bin disciple of hers.

The hardness of these bones was highly abnormal. Their calcium content far surpassed that of ordinary people, no worse than that of taijutsu-specialized Jonin who had trained extensively in taijutsu.

More importantly, the bone density was extremely uniform. Even the density and strength of the bones throughout his entire body were nearly identical. That was very unusual.

Watching his bone fragment suffer all manner of torment in Tsunade's hand, Shimura Kentei felt terrible all over.

That fragment naturally belonged to him. It could have been reassembled, but this woman had forcibly removed it for research.

Were team teachers these days all this hardcore and brutal?

"That is the bone-forging secret art within the Body Strengthening Technique developed by our Shimura Clan. It can increase bone density, thereby improving bone strength, toughness, and other properties."

"Body Strengthening Technique? So you truly do have a complete set of Body Strengthening Secret Technique!"

Tsunade wore an expression of sure enough. While treating Shimura Kentei's injuries earlier, she had thoroughly examined him and discovered that every aspect of the boy's body far surpassed that of ordinary people. Even his internal organ functions were exceptionally strong.

Yet the vitality within his body was quite ordinary. It was certain that he did not possess the Sage Body bloodline of their Senju Clan.

After all, the essence of the Senju Clan's Sage Body was powerful vitality. Only with powerful vitality could one train equally powerful physical fitness.

That meant this boy's physical fitness had not come from innate talent, but had been cultivated through hard work.

This showed just how formidable the Shimura Clan's Body Strengthening Technique was. It could practically mass-produce Taijutsu-specialized Chunin.

This had already reached the strategic level. Its significance was extraordinary.

Of course, although Tsunade coveted this Body Strengthening Technique greatly, she did not ask further.

The inheritance of secret techniques was the foundation of ninja clans. Even the Hokage had no right to seize another's secret techniques. Naturally, she would not violate such a taboo.

Moreover, the current Shimura Clan was not weak. Shimura Danzō was the village's second-in-command and stood together with Sarutobi Hiruzen and the others. No one would want to provoke them.

"Teacher Tsunade, I plan to use this chance to deepen my training in the Body Strengthening Technique. Please cooperate with some Medical Ninjutsu."

Seeing that Tsunade had actually restrained herself from asking, Shimura Kentei regarded her more highly. He then stated that he wanted to train the Body Strengthening Technique, further tempting her.

Although Tsunade had passed down the Yin Seal, Monster Strength Technique, and other inherited secret arts to Haruno Sakura in the original story, the Senju Clan had already declined and even perished by then, so she had no need to worry about anything else.

But the Senju Clan was currently at the height of its power. Although it was not as strong as when Senju Hashirama and Senju Tobirama were alive, it remained immensely powerful, the foremost great clan in the ninja world. Even the Uchiha Clan was suppressed by it.

Therefore, if he wanted to learn secret arts such as the Monster Strength Technique from Tsunade at this stage, he would have to use some methods.

"That isn't part of my task of treating your injuries!"

Although she was tempted by the proposal and could use this chance to glimpse the mysteries of the Shimura Clan's Body Strengthening Secret Technique, Tsunade Hime was a professional woman with work ethics. She never did anything outside the scope of a mission.

Unless they paid more!

Having long seen through this teacher's true nature, Shimura Kentei did not hesitate to unleash his Tycoon's Haki once more, deeply shocking Tsunade again.

"Ten million ryo!"

"How should I cooperate?"

Her expression instantly changed, and Tsunade asked with a beaming smile.

"Can't you have a little integrity?"

Jiraiya, lying on the hospital bed beside them, could not help but complain. He felt that Tsunade was lowering the prestige of their three-person team.

"And you're qualified to talk about integrity?"

Tsunade shot him a contemptuous glance. She had long been displeased with this pervert.

None of you three have any integrity!

Shimura Kentei inwardly complained. In Naruto, those three were all representatives of shamelessness, sunk deep into the point of no return of sex, gambling, and drugs. They were truly Konoha's disgrace.

"Kentei, if you need help training the Body Strengthening Secret Technique, I believe I can lend a hand."

At that moment, a handsome young man with long, straight black hair entered the hospital room. His pair of golden snake eyes held a trace of fiery passion, as though he had seen the love of his life.

Who else could such a creepy figure be but Orochimaru?

"(→_→)"

Are you sure you only want to lend a hand, rather than slice me up for research?

He silently complained, but Shimura Kentei did not reveal it. Instead, he said delightedly, "It would naturally be even better if Senior Orochimaru is willing to help."

"Keep channeling Yang Release Chakra into me and circulate it according to the guidance of my Chakra Threads."

After giving that simple instruction, Shimura Kentei quickened his breathing. Dull, thunder-like sounds began to emanate from his throat. It was the core of the Body Strengthening Technique: Tiger Leopard Thunder Sound.

The complex, ever-changing sound waves surged through his body, working with Chakra to temper his entire body, including his bones, tendons, muscles, skin, bone marrow, internal organs, meridians, acupoints, and even his neural network.

This tempering method opened Orochimaru and Tsunade's eyes. It was their first time seeing such a miraculous training method.

In truth, Shimura Kentei's inspiration for creating this sound-wave Body Strengthening Technique came from the martial arts novels he had read in his previous life, which mentioned Tiger Leopard Thunder Sound and Hum Ha Two Sounds.

He did not know whether such miraculous martial arts truly existed in reality, but Shimura Kentei knew that three types of sound waves could produce resonance effects on different objects. Infrasound could better resonate with soft matter, making it ideal for tempering muscles, skin, and internal organs.

Ultrasound could better resonate with solid matter, making it suitable for tempering bones. Combined with the human body's faint ability to adapt and evolve, this became the current Body Strengthening Secret Technique.

Of course, all of this was based on Chakra. Without Chakra's cooperation, doing this would mean certain death. Moreover, it had to be done gradually.

He had trained in the Body Strengthening Technique for several years before attaining physical fitness comparable to Rock Lee during the Chunin Ninja Exams in the original story.

Rock Lee might not have seemed that impressive, but during the second stage of the Chunin Ninja Exams in the Death Forest, he had pulled a tree root over a meter in diameter from the ground with one hand to block an enemy attack.

And Rock Lee had not activated the Eight Inner Gates Formation at the time. He had relied purely on physical strength. One could imagine just how terrifying that strength was. It was absolutely measured in tons.

The weighted gear he cast off before fighting Gaara had also smashed two large craters into the ground, kicked dust several meters into the air, and caused the entire indoor arena to shake. That weight was definitely at the ton level.

In other words, he still could not defeat Five Gates Rock Lee from the Chunin Ninja Exams. The Eight Inner Gates Formation's enhancement of taijutsu was simply too monstrous, far beyond what his current Super Strength Technique and Super Speed Technique could compare to.

This training continued for a full hour before finally stopping. Tsunade wiped the thin sweat from her forehead and said sternly, "Kid, you're being too reckless. Training like this causes tremendous harm to the body. The losses outweigh the gains."

"This method of strengthening the body indeed comes at a considerable cost!"

Orochimaru nodded in agreement from the other side, his interest in the Shimura Clan's Body Strengthening Technique greatly diminishing.

If it was a training method that required such a huge price, its value would be greatly reduced. There were countless similar methods, and compared to those, the Shimura Clan's Body Strengthening Technique had nothing particularly outstanding about it.

"What happened now?"

Jiraiya, who had remained silent the whole time, saw his two friends' solemn expressions and asked worriedly. He had roughly guessed that there might be a problem with the Body Strengthening Technique Shimura Kentei had used.