Chapter 1: Will of Fire? Deceiving Will!
"I never thought that after graduating from a normal university, instead of becoming a teacher, I'd transmigrate and still become one," Mugetsu muttered helplessly after sorting through his memories.
It seemed he truly couldn't escape the word teacher.
Back in high school, he was one of the top students in the art class, so classmates often asked him for help. That earned him the nickname Mugetsu-sensei. Then, when applying for university, he ended up attending a normal university. Following his family's advice, he chose a teaching major—one of the school's strongest programs. During college, he tutored his roommates and, once again, was called Mugetsu-sensei.
To everyone's surprise, when he finally graduated, Mugetsu rebelled a bit. He passed the civil service exam and decided not to teach.
What he never expected was that on his first day of work—just as he stepped into the office—he transmigrated.
The next moment, he found himself in a new body, standing in the Ninja School's office… as a freshly assigned teacher.
His new name was Hayate Mugetsu. His given name remained Mugetsu, only his surname had changed.
"Sigh… This world isn't safe. Too many lunatics and obsessive maniacs running around—and all of them are terrifyingly strong," Mugetsu sighed inwardly.
He casually observed the office. It wasn't much different from the school offices of his past life, but the kunai lying carelessly on the desk made it clear: this was no longer the peaceful country he once knew.
What frustrated Mugetsu even more was the fact that he wasn't just a teacher.
He was also a Root ninja.
This body's original owner was an orphan raised by Root from childhood. Becoming a Ninja School teacher had been Danzo's order—to observe, monitor, and report on the academy students, especially if any prodigies appeared.
"Being under Danzo's command… is not a good place to be."
As Mugetsu contemplated how to survive in this dangerous world, a cold, mechanical voice suddenly rang in his mind, and a transparent blue panel appeared before his eyes.
[Teacher System Activated! Congratulations, you have successfully become a teacher!]
[Teaching students will earn rewards. The more outstanding the student, the higher the reward.]
[You may take outstanding students as disciples for one-on-one instruction. The teacher will receive rewards as the disciple's strength grows.]
[PS: Taking a disciple requires mutual consent. One-sided discipleship is not allowed.]
Mugetsu studied the blue panel. There were only two available tabs: personal panel and master-disciple section. He clicked the personal panel first.
[Name: Hayate Mugetsu]
[Age: 18]
[Chakra: 4300]
[Skills: Three Body Technique, Fire Release: Great Fireball Technique, Fire Release: Phoenix Sage Fire Technique, Body Flicker Technique, Konoha Style Taijutsu]
[Evaluation: An elite among Chunin, a slightly more useful cannon fodder in war.]
After reading the rather disheartening evaluation, Mugetsu quietly closed the personal panel and tapped the master-disciple tab. It was blank—for now, he had no disciples.
A bell rang in the distance.
Mugetsu remembered he had a class and quickly packed his things before heading to the classroom.
Though he was a new teacher, the Ninja Academy was currently short-staffed, so Mugetsu was also assigned as a homeroom teacher for a new class.
He glanced at the class roster as he walked and noticed several familiar names.
There was Anko. Kotetsu and Izumo were listed too—the future gatekeepers of the village.
But what made Mugetsu's eyes light up was seeing the name Shisui.
This wasn't just any child. This was a true genius.
Since the system rewarded him based on a disciple's growth, the more talented the student, the better. Shisui was a golden ticket.
Mugetsu adjusted his expression before entering, putting on a warm, sun-like smile.
The Ninja School classrooms were uniquely designed. To make it easier for students in the back to see the board, the seats rose higher row by row like stadium bleachers.
As Mugetsu entered, the previously noisy classroom fell silent.
After all, these were five- or six-year-old kids attending school for the first time. Most were a mix of nervous and awestruck at seeing a real ninja teacher.
Of course, there were exceptions—like the bold little girl with purple hair in a single ponytail, sitting in the front row. As soon as Mugetsu walked in, she piped up:
"Big brother, you're so handsome! Are you our teacher?"
Mugetsu smiled and nodded.
"That's right, beautiful little student. I'll be your homeroom teacher from now on."
"Hehe~" The girl beamed. Praised for her looks, she immediately decided that this golden-haired teacher was a good person.
Seeing their classmate chatting so easily with the teacher, the other children were visibly relaxed. Many had heard from older siblings or relatives that teachers could be scary.
Mugetsu walked to the podium, picked up a piece of chalk, and wrote his full name on the board. Then he turned around and introduced himself properly.
"My name is Hayate Mugetsu. Starting today, I'll be your teacher. I look forward to spending this time with all of you."
"Yay! Teacher, my name is Anko!" the purple-haired girl cheered.
With her leading the way, the other students quickly followed. Even Shisui politely introduced himself.
Mugetsu kept an eye on the system panel, waiting for some kind of response—but nothing happened.
He felt a little disappointed. He had hoped that simply becoming their teacher would trigger a recognition from Shisui, enough to take him on as a disciple.
But it seemed the system wasn't that easy to fool.
The exploit failed.
Mugetsu didn't show any emotion on his face. After everyone finished introducing themselves, he pressed his hands down, signaling the class to quiet.
"Before we begin the lesson, I want to ask you all a question: Does anyone know how Konoha came to be?"
The room fell silent again. The children looked at each other, unsure how to respond.
Shisui, who had already received clan education, knew a bit. But he wasn't the type to show off—unless directly called upon, he wouldn't speak.
"People built it, of course," Anko replied after thinking for a moment.
"That's right. People did build it," Mugetsu nodded. "But what you need to understand is—who built it, and why it was founded."
"Before the era of the Ninja Villages, there was the Warring States Period—a time of endless conflict. Back then, even children your age might have been forced to pick up weapons and fight. War could break out at any moment..."
As he spoke of that brutal history, Mugetsu's voice deepened. He didn't sugarcoat it—he let the children face the truth of the Warring States Period directly.
Perhaps because children in the ninja world matured early, or perhaps because this was Konoha, many of them sensed the weight in his words. The atmosphere in the classroom shifted.
"During that time, two clans stepped forward: the Senju Clan and the Uchiha Clan," Mugetsu's tone grew passionate, rising from somber to spirited.
"I know, I know! First Hokage Hashirama-sama's surname is Senju!" one student blurted out, excited to participate.
The moment the Senju were mentioned, the children's eyes lit up. They didn't know much about ancient wars, but they recognized the name.
Shisui sat quietly, hearing everyone focus on the Senju while no one mentioned the Uchiha. A faint disappointment flickered in his heart. He didn't understand why both founding clans of Konoha weren't treated equally.
"To protect the next generation… to stop children from having to go to war, the two clans came together and founded Konoha. They united more ninja clans under this vision, and ended the chaos of the Warring States Period. That's how Konoha was born."
"Where the leaves dance, the fire burns bright. The fire's light will continue to illuminate the village… and nurture new leaves.
"It was the selfless efforts of our ancestors—their willingness to sacrifice everything—that gave us the life we have now. The reason we can sit peacefully in this classroom is because of that same spirit. That spirit… is the Will of Fire."
Mugetsu's expression turned solemn as he finished. It was as if he was silently honoring those who came before.
He figured Shisui would take interest in a teacher who understood history and spoke sincerely about the Will of Fire.
"So that's how Konoha came to be? Next time I pass by the Hokage Rock, I'll definitely pay my respects."
"I want to become a ninja of the Will of Fire and protect Konoha too!"
The students, now imagining their ancestors forging the foundations of the village, were fired up. Inspired by Mugetsu's words, they eagerly declared their resolve.
Shisui's eyes lit up. He looked at the new teacher with fresh curiosity. This man seemed… different. Maybe the Academy wasn't going to be as dull as he thought.
He had originally planned to graduate early. His elders had told him most of what the Academy would teach, and he was preparing to join the Police Force. But now, he was reconsidering.
"So, does anyone know how many chakra natures there are?" Mugetsu asked next.
"Five! Water, Earth, Wind, Lightning, and Fire!" one student quickly answered.
"Not quite," Mugetsu smiled. "There are seven chakra natures. In addition to the five basic nature transformations, there are two special ones—Yin and Yang."
He deliberately let someone answer incorrectly first before correcting them. This way, the knowledge would stick more deeply in their minds.
He then began to explain the basic understanding of chakra, occasionally slipping in a joke to make the class laugh. His light-hearted style kept the children engaged and at ease.
Time passed quickly.
Before anyone realized, four full class periods had flown by. When the dismissal bell rang, Mugetsu smiled and said:
"Class dismissed! Tomorrow, we'll talk about chakra extraction."
He ended the lesson smoothly, even giving a preview of the next class.
The children blinked in surprise. Has class really ended already? It felt like it had just started. But when they thought about it carefully, they realized four periods had passed.
Mugetsu's lessons had been both serious and fun, and time had slipped by unnoticed.
"Chakra extraction—I can't wait!" Anko was already eager for the next day.
Her family weren't ninjas, so this was her first exposure to such knowledge.
"Class was actually fun? My cousin lied to me! He said school was boring and hard. When I get home, I'm telling Auntie about him stealing money to buy snacks." Kotetsu looked genuinely indignant.
"Wouldn't it be better to blackmail him with that and make him give you the snacks instead?" Izumo, beside him, offered helpfully.
Kotetsu's eyes lit up with realization. He slapped Izumo on the shoulder and grinned.
"Great idea, bro! If it works, I'll split the snacks with you!"
As Mugetsu prepared to leave the classroom, Shisui stood and quietly followed him out.
[Lesson completed. Settling rewards…]
[Evaluation: A]
[Successfully inspired students' sense of responsibility and enthusiasm through historical storytelling. The lecture content was coherent and interactive. Student satisfaction: High.]
[Rewards settling…]
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