I founded the "Bragging Cult" in Naruto.

In Chapter 468, the end-of-term teacher evaluations showed that every student was like a model student.

When you delve into a certain field to a certain depth, everything in that field becomes naked and clear.

For example, an excellent chef can deduce the ingredients, seasonings, and cooking methods of a dish by tasting it.

Or perhaps a seasoned programmer, upon seeing a certain feature, will unconsciously conjure up in their mind the tools and code needed to implement it.

Of course, the premise is that you study hard enough. If you only learn without thinking, you will be dumbfounded when you see new things. To the extreme, you may know that one plus two equals three, but you may not know that three minus two equals one.

Tatsuma wouldn't dare say he's mastered all the techniques in the ninja world, but most of them have become incredibly simple in his eyes. Learning, implementing, and even reverse-engineering their principles and inspirations are not difficult tasks for him.

Looking at the ninjutsu scroll that Nono handed over, he exclaimed, "What a brilliant idea! It treats the chakra spread by the perception technique as a wave, and then reflects it as a wave of opposite phase, making people invisible from the perception field of vision."

Nonou lowered her head slightly, a shy look on her face after being praised. Tatsuma stared at the ninjutsu scroll, scratched his bird's nest-like hair, and said, "The upper limit of your technique is almost infinite."

"Um?"

This praise was so high that Nono didn't know what to do. Tatsuma pulled his fingers away from the gradually knotting hair and said, "Chakra is an extremely special existence. In addition to the special waves when chakra dissipates, it can also simulate mechanical waves and electromagnetic waves."

It's like...

"Buzz!"

Suddenly, Nono felt the Hokage's office become incredibly quiet, so quiet that she felt like she was suffocating. This unusual situation caused her brain to "speak" against the silence, producing a buzzing sound that only occurs during auditory hallucinations.

In her eyes, Tatsuma was clearly speaking, but she couldn't hear anything. Relying on her knowledge of lip reading, Nono managed to make out some of what he was saying.

"Active noise cancellation. The opposite wave is absolutely silent."

"Shhh~"

Suddenly, the surroundings became incredibly noisy. No, the surrounding sounds hadn't changed; it was just that her auditory system and brain processing were out of sync, causing her brain to amplify the perceived sounds.

A few seconds later, Nono's hearing returned to normal, and she heard Tatsuma say, "This is the mechanical wave simulated by chakra. It can completely deceive your brain, making your brain feel that there is no sound around you."

Simulating electromagnetic waves would be too difficult; chakra alone cannot completely simulate electromagnetic waves unless it's a special chakra from a bloodline limit.

As he spoke, a chakra ball appeared in his hand. It wasn't a Rasengan, just a ball of condensed chakra. However, Nono began to swallow hard. The feeling of physical discomfort that comes with fighting genjutsu or hallucinogenic drugs was gradually appearing.

The chakra ball became colorful and uniform, with all colors matching perfectly. Even its shapes became bizarre and varied. Feeling like she was about to faint at any moment, Nono simply closed her eyes.

Seeing that Nonou's lips had turned pale and her hands were trembling involuntarily, Tatsuma dispersed the chakra ball in his hand and said, "I can't calculate the spectrum of light received by your eyes, so what did you see?"

"It's like a hallucination after eating poisonous mushrooms."

Nonou swallowed a few more times before opening her eyes and saying with some difficulty, "This is the limitation of human beings. No matter how flexible the brain is, it cannot achieve the kind of invisibility function I want." Tatsuma nodded and said, "This is the limitation of human beings. No matter how flexible the brain is, it cannot achieve the kind of invisibility function I want."

Your technique is quite ingenious, only using the chakra wave band of the most commonly used perception technique. It can be practiced repeatedly to achieve the function of sensing the field of vision and becoming invisible, but it also has limitations.

Some special sensory techniques, such as the Five Elements Chakra, or Inuzuka's sense of smell, Aburame's sense of insects, Byakugan's X-ray vision, or Sunagakure's Magnet Release perception, cannot be fooled.

But I think that's enough. After all, adding more wavebands would only increase the difficulty of the technique, and the basics are the norm. There's no need to make extra expenditures for low-probability events.

Upon hearing this, Nono nodded. Of course, she knew this and had considered taking things further that night, but it was too difficult to find "materials." The Five Elements Chakra Sensing Technique was alright; she could ask Tatsuma for help.

However, with Inuzuka and Aburame's secret techniques, as well as the Hyuga Byakugan and even the Sunagakure Magnet Release bloodline limit, it's almost impossible for anyone to help her with her techniques, since that's where their competitive advantage lies.

As for other uses of Tatsuma's simulation, Nono never even considered implementing them, because she didn't have a brain as sharp as Tatsuma's. Tatsuma could distinguish the characteristics and differences of all the sounds he heard, but Nono couldn't.

Not to mention that even Tatsuma couldn't achieve visual invisibility by simulating electromagnetic waves.

Tatsuma rolled up the scroll and said, "This technique is enough for me to grant you the qualification for a Jonin assessment. However, I do not recommend its widespread adoption. It should only be implemented within your wartime medical team."

"Why? If everyone could do it, then after getting injured, it would be easier to hide."

Nonou was puzzled, but Tatsuma shrugged and said, "The more people master this technique, the shorter its lifespan will be. Especially for combat ninjas who need to directly contact the enemy, they should not learn this technique."

Otherwise, our village will have to set up a separate department to deal with the improvements made to perception techniques by other villages, just like the current deciphering of each other's ciphers, which has become a tedious and lengthy task.

Think about it, how many coded texts have you memorized? If this technique is widely implemented, how many different ways of dealing with perception wavebands will you have to learn, causing the technique to completely lose its cost-effectiveness.

After listening to Tatsuma's explanation, Nono nodded and realized that she had always viewed things from a "personal" perspective, while Tatsuma was clearly very used to viewing things from the village's perspective.

The best thing for an individual ninja is for everyone to learn this technique, but the best thing for a village is for a small, specific group of people to learn it.

This is actually quite cruel, because some people will inevitably die on the battlefield because they miss the opportunity to learn this technique. But at the same time, it will also prolong the period of secrecy surrounding this technique, allowing it to help more people for a longer period of time.

"Okay, I'll do whatever you say."

Even after saying this, Nono still felt a little regretful. In the end, the technique she developed was too limited. If she could develop a technique that wasn't so easy to break, perhaps it could benefit more people.

Tatsuma nodded, took out a pen, ink, and paper, and began writing a letter of recommendation for Nonou. This was simple because he knew Nonou's growth path well, and could even be said to have been highly involved.

From "supporting the medical ninja training system (becoming a trainee)" to "vertically implementing and widely promoting medical ninjutsu and its training system (becoming a doctor or a teacher)" to "expanding the scope of the medical field, putting medical knowledge into practice, and leading a vibrant new team to give back to the village (scientific research, joining the medical department, applying for promotion and voluntarily requesting to serve as the wartime medical squad leader)", and so on.

In addition, Tatsuma attributed the credit for the free clinics and the welfare homes that sheltered disaster victims to Nonou. Before long, a letter of recommendation that looked very impressive was completed.

Holding the letter of recommendation, Nono felt a little embarrassed. The person in the letter seemed like a saint, not her at all.

Nonou smiled so wide her eyes disappeared. After a while, she opened her squinted eyes and said, "Tatsuma, I will work hard and I will definitely live up to your expectations. I'll go submit my application now. Goodbye."

Tatsuma's eyes were blank. What were his expectations of Nonou? What expectations?

But at this moment, Nono had already turned around and left with light steps. Tatsuma shook his head. They say you can't guess what a girl is thinking, you'll never understand no matter how hard you try. And it's true.

As for the compliments in the recommendation letters, isn't that how they all say it? Even when Lu Jiu is slacking off, he can write it as a balance between work and rest, seizing fragmented time to recharge and so as to be in a better mental state to cope with the high-intensity work that follows.

Letters of recommendation are like teacher comments at the end of the semester or company comments on a termination certificate; they cannot contain information that is detrimental to the student or the employee.

In his past life, Chenma frequently received background checks from former colleagues at their new companies. He had honed his skill of saying the opposite of what he meant to be true to the highest level. If he wanted, he could praise anyone as a model worker who moved China.

If someone with no redeeming qualities is treated this way, then someone like Nono, who is full of merits and achievements, will certainly receive even more enthusiastic and sincere recommendations.

After filing the ninjutsu scrolls provided by the Ino-Shika-Cho trio and Nono, Tatsuma was about to continue working when someone came to the Hokage's office again. This time, the person was not so polite and didn't even knock on the door.

Seeing the three legendary ninjas arrive, Tatsuma asked helplessly, "What do you want? If you're looking for the Third Hokage, go look for him on the street."

Perhaps it was prejudice, or perhaps it was past experience, but Tatsuma was certain that these three people hadn't come for anything good. Sure enough, Orochimaru cut to the chase:

"When it comes time to plan the battlefield, can you arrange for the three of us to be on the same battlefield, with one of us taking command?"

Upon hearing this, Tatsuma gave him a scrutinizing and suspicious look, and asked, "Something's not right with you guys! Can you give me a reason?"

Even if the person in front of him is his teacher, half-teacher, or de facto teacher, Tatsuma is currently sitting in the position of Hokage. He can't be too blatant in abusing his power for personal gain. These three people need to have a reasonable excuse.

"I want money. As a commander, I can maximize my wealth within reasonable limits."

"I don't want to follow orders. On the battlefield, I want to be in charge. Taking command myself is the best way."

"I was dragged here by the two of them. And if the village were to assign me to your or Minato's command, wouldn't I, as a teacher, lose face?"

Orochimaru, Tsunade, and Jiraiya gave their reasons, and Tatsuma's lips twitched as he asked, "Do you think these reasons are enough to make me agree?"

"Just tell me if you have the necessary permissions; you can handle the rest."

Orochimaru had no intention of being polite to Tatsuma in the slightest. Tatsuma sighed helplessly and said, "I'll try my best to arrange it, but don't you dare mess with me later."

"When we have money, let's do scientific research together."

"If anyone in the village dares to have a problem with you, I'll beat them up until they submit!"

"I...I thank you."

As soon as Jiraiya finished speaking, he received disdainful looks from his two teammates and Tatsuma. He said sullenly, "This kid is more amazing than me now. What else can I give him? Sincere gratitude is the greatest reward I can give him right now, isn't it?"

"Last place!"

"Useless!"

"miser!"

The three of them spat at the same time. Jiraiya chuckled shamelessly. He had nothing left to offer. The only thing he had more expertise than Tatsuma was his practical experience in the red-light district. He couldn't possibly repay him with that, could he?

(End of this chapter)