Mutsuki spent two hours teaching Shisui, then switched with his Shadow Clone, with the original teaching Kakashi's group while the Clone taught Shisui.
Although Shisui was the most promising, Mutsuki wouldn't show favoritism in teaching; he would give equal attention to all.
Returning to Kakashi's group, Mutsuki first used the Identification Jutsu to check their data. He found that Kakashi and Obito already had some proficiency in Yin Release, but Obito's proficiency was very low, only one point, while Guy had none.
Mutsuki wasn't surprised; this was within his expectations, knowing Guy couldn't even learn Shadow Clone in a month under his teaching.
With the upgraded version of his teaching, Kakashi's Yin Release Nature Transformation proficiency level rapidly increased. After two hours, it jumped from three points to ten points.
Obito also increased from one point to three points, while as for Guy, he finally made a breakthrough from zero and gained a little proficiency.
This made Mutsuki very relieved; having a proficiency level meant there was hope of learning, even though it would be much slower.
In the afternoon, Mutsuki didn't let Guy continue practicing Nature Transformation but instead had him practice Eight Inner Gates.
Actually, for the current Guy, practicing Eight Inner Gates was the most important.
The reason why the Mark State of Stone Breathing would be powerful on Guy was because he could cultivate the Eight Inner Gates to an extremely high level, then have a large amount of Chakra to burn for Stone Breathing.
Haki, without precise control, also consumed a lot of Chakra. Mutsuki could say that even if Guy learned Haki now, it wouldn't have much practical significance. Without the Eight Inner Gates, where would he get so much Chakra to burn?
As for Kakashi and Obito, they continued their Yin Release Nature Transformation practice in the afternoon.
Nature Transformation is easy to learn but difficult to master. Mutsuki noticed that some Chunin sensei had also learned Yin Release Nature Transformation, but they were only at the Beginner level, and their proficiency levels were not high, basically at the level of learning some simple Genjutsu.
Estimating based on Kakashi's fastest progress, Mutsuki felt Kakashi could reach Yin Release Nature Transformation Beginner level in about seven days.
The proficiency level from Pre-Beginner to Beginner is one hundred points. Although Kakashi could increase his proficiency level by ten points in one go in the morning, Nature Transformation becomes harder to improve as one progresses, and it's not a fixed increase of ten points for every four hours of practice.
As for Obito, Mutsuki felt it might take around twenty days, while for Guy, Mutsuki couldn't estimate accurately; it might take several months.
As the afternoon practice was coming to an end, Mutsuki sent a Shadow Clone to the training ground for the holiday special training. He had promised Anko earlier that he would take a look when he had time.
His main body was indeed very busy, as he couldn't spare time from using teaching skills to accelerate the students' learning speed in Ninjutsu. However, creating a Shadow Clone didn't add pressure.
When Mutsuki arrived at the training ground, it was almost time to disband, and the students had begun to rest.
Taking a glance around, Mutsuki happened to see Anko lying on the ground, so he walked over.
"How was the special training?" Mutsuki approached with a smile.
Anko, who had been napping with her eyes closed, instantly woke up upon hearing this familiar and warm voice. After confirming it was Mutsuki, she directly hugged his thigh and complained, "Yumi-sensei, holiday special training can't be without you. It's like a strawberry cake without strawberries; it loses its meaning without you."
Mutsuki bent down, ruffled Anko's hair, and pulled her off, making her sit on the grass. He smiled and asked, "Did something happen? Why suddenly can't the special training go on without me?"
Anko's voice also caught the attention of some nearby people. Since the personnel for this special training were almost the same as last time, students around saw Mutsuki and gathered around.
"Those sensei don't have the teaching skills like you, Yumi-sensei. Even if they can't teach, it's fine, but they still assign a large number of training tasks for us to complete, and they don't allow breaks midway," Anko vented all her frustrations from these days to Mutsuki.
"Yeah, although there are several sensei, it's still not as good as having just you, Yumi-sensei, to teach," nodded the students nearby, agreeing with Anko's complaints.
The students found it strange. The last special training was a great success, so why change things instead of following the previous experience?
Anko's words opened the floodgates of complaints from the surrounding students, and many expressed their dissatisfaction. Mutsuki listened with a smile.
In a way, he wasn't too surprised; these sensei's actions were within his expectations.
Last time, Mutsuki had managed the special training well and was promoted to Special Jonin by Third. Moreover, the senseis selected for this special training were among the most capable at the Academy.
Individually, they might not dare to compare themselves to Mutsuki, but as a group, it's different. They would think that at least with several of them combined, they could match up to Mutsuki.
Even if they couldn't become Special Jonin like Mutsuki, a promotion and salary increase shouldn't be a problem.
But reality is cruel. Besides Mutsuki's teaching skills, even without them, his proficiency alone could surpass those Ninja senseis. He has various high proficiency level skills with real training experience, and Mutsuki has also learned how to become a sensei in the previous world system.
Whether it's ninja knowledge or the professionalism of being a teacher, those Chunin sensei cannot be compared to Mutsuki.
When they realized they might not achieve results, they became anxious. Teaching together as a group didn't yield results as good as Mutsuki's when he was teaching alone initially, and that's with Mutsuki's successful experience as a foundation.
Increasing the training intensity became the natural course of action, after all, strength can't possibly decrease with more training, right?
As more and more students gathered around Mutsuki in a circle, even more students came over.
Originally, they came to watch the excitement, but seeing Mutsuki here, they thought they should have a good chat.
As more students gathered, the crowd grew quickly, and eventually, most of the students came over to Mutsuki's side.
"Why are you all gathering here? Go back to your own classes," the Chunin sensei noticed the unusual gathering of students and came over to scold them.
"Anyway, class is almost over, so let them have some free time to rest," Mutsuki spoke up.
Only then did the Chunin sensei notice Mutsuki sitting among the students. Many of the students were standing, blocking the Chunin sensei's view.
"Oh, it's Director Mutsuki. What you said makes sense. Everyone, take a good rest," the Chunin sensei smiled and said.
As a relatively progressive sensei, he admired Mutsuki. Within less than a year of joining, he was rapidly promoted. Not only did he advance his position at the Academy, but he also went directly from Chunin to Special Jonin.
Then, Mutsuki continued chatting with the students. Even after class was over, many students stayed behind to talk with Mutsuki instead of going home.
"This term's holiday special training, I won't be able to participate again because I have other responsibilities to take care of. As for the future, I'm not sure yet; it depends on Third-sama's arrangements. Personally, I want to continue leading the special training," Mutsuki answered each student's question.
When Guy and the others graduate, Mutsuki probably won't be mentoring interns for a long time, especially since Shisui will only be in his second year then. It's still too early.
"I'll coordinate with the special training sensei to see if we can come up with a more reasonable training plan," Mutsuki said with a smile.
Last time, the students gave him a pleasant surprise at the end of the special training, so Mutsuki doesn't mind doing such things.
"Yumi-sensei is the best!" Anko cheered. She decided that if Mutsuki isn't the sensei for the next special training, she won't come; only fourth-year students are forced to attend.
...
The next day.
In the morning, Mutsuki continued training Kakashi, Obito, and Guy in Yin Release Nature Transformation, while Shisui trained in Armament Haki alone. In the afternoon, Mutsuki arranged for Kakashi to practice Thunder Breathing.
The reason for not teaching yesterday was mainly because the disciple return only happens once a day, so he delayed teaching for a day in order to maximize rewards.
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