“Never in my wildest dreams did I imagine that one day I’d transmigrate to Konoha. And… seriously, I ended up as an intern teacher?”

“Damn it!”

Kanda Kyoichi sat in the office, questioning his life choices.

Just yesterday, he was struggling with elementary school kids who didn’t like male teachers. Now, those problems—along with the risk of being unemployed or getting complaints from parents—seemed trivial. But at this moment...

Hearing the noisy kids outside, he couldn’t muster any excitement in his heart.

The ninja world was far too dangerous!

Konoha was relatively safe, but even it wasn’t free from disasters over the years.

Not long ago, the Battle of Kikyo Pass had just ended. Kyoichi had been injured in that conflict and, once his wounds were mostly healed, was assigned to the Ninja Academy as a teacher.

“Sigh, if only the Senju Clan hadn’t declined. I could’ve just coasted through life under their protection.”

Kyoichi let out a sigh.

The Kanda family carried traces of Senju blood. The Senju Clan had once been illustrious, but…

Starting from the First Hokage, the clan gradually dispersed and merged into Konoha’s population. By the time of the Second Hokage, only a few direct bloodlines remained. Now…

The only one who could still be considered a true Senju was Tsunade.

And yet...

Even Tsunade didn’t use “Senju” as her surname anymore. As for the benefits of being part of the Senju Clan, Kyoichi wasn’t entitled to any of them.

He figured the Senju blood in his veins wasn’t particularly potent either—certainly not more so than Tsunade, the First Hokage’s granddaughter.

The Sage Body? Forget about it.

As for talent…

At fifteen or sixteen years old, he was still only a Chūnin. That was probably the best he could hope for.

Kyoichi was deeply troubled.

At this rate, the odds of living to old age seemed slim. After all, Konoha’s future would bring one disaster after another: the Third Shinobi War, the Nine-Tails’ attack, the Konoha Crush…

A mere Chūnin wouldn’t stand a chance against those threats. Just the aftermath of those events could easily kill him.

“Maybe I should get my hands on some Hashirama Cells. Who knows, I might unlock Wood Release,” Kyoichi thought to himself.

The ninja world was perilous.

Without strength, it was basically a waiting game for death.

As he mulled over these thoughts, the bell outside suddenly rang.

Class was over…

A case of literary theft: this tale is not rightfully on Amazon; if you see it, report the violation.

“Looks like the next class is mine.”

Kyoichi was responsible for teaching Ninjutsu.

He didn’t understand why he was assigned this subject. From what he’d heard, the previous instructor had died on the frontlines, and they’d just drafted him to fill the gap.

As such, Kyoichi’s position was only temporary.

“Oh well, let’s get this over with.”

Ninjutsu class wasn’t particularly challenging. Basic skills like the Three Basic Techniques (Transformation, Clone, and Substitution) were more than enough to teach these kids.

Just as Kyoichi stood up, a strange voice echoed in his head.

At first, it was faint.

But soon, the words became clear.

[Activating Mentor System…]

[Activation complete!]

[Earn rewards by teaching students with dedication. Greater rewards await those who become true life mentors.]

[A beginner’s gift is available. Would you like to claim it?]

Kyoichi froze.

The Mentor System?

A beginner’s gift?

What was this, an onboarding package?

After a moment of hesitation, he thought, “Claim it!”

[Your proficiency in the Three Basic Techniques has been maxed out.]

[Reward: Bloodline Purification.]

[Your Senju bloodline has been purified, greatly enhancing your constitution.]

[Your Earth and Water Release techniques have been strengthened.]

As he walked down the hallway, a flood of knowledge about the Three Basic Techniques filled Kyoichi’s mind.

Then, a sudden rush of heat surged through his body.

His body temperature was rising rapidly.

Was this the purification effect?

At first, Kyoichi was confused, but soon, he was overjoyed.

Senju bloodline!

Even now, the enhancements to his constitution, Earth Release, and Water Release were already evident.

What’s more, a stronger constitution meant greater chakra reserves—an invaluable asset for the future.

He could now start considering things like acquiring Hashirama Cells and achieving extraordinary feats.

And with this Mentor System, who knew? Maybe he’d even unlock the Sage Body or Rinnegan someday.

For the first time, Kyoichi felt like he had a real chance of surviving in this dangerous world.

“What exactly does the Mentor System entail?”

From the system’s description, it seemed that dedicated teaching would yield rewards. Becoming a life mentor promised even greater benefits.

But what did “life mentor” mean?

After pondering for a while, Kyoichi decided to put it aside for now. He needed to head to class and see what kind of students he had.

As he walked, he noticed the changes in his body. His enhanced constitution made him faster and lighter on his feet.

At the classroom door, a familiar face caught his eye.

It was Uchiha Obito.

“You’re Uchiha Obito?”

“Yes, Sensei,” Obito replied, fidgeting nervously at the door.

“Take your seat.”

Kyoichi didn’t need to ask why—Obito was obviously late.

Inside, he recognized several more familiar faces: Rin, Kurenai Yuhi, Asuma Sarutobi...

And even Shisui, Anko, and Hayate Gekkō were in the class.

The war had left manpower stretched thin. Many teachers had been sent to the frontlines, forcing Ninja Academy to combine classes with students of similar ages—a temporary measure that included Kyoichi’s assignment.

“Hello, everyone. My name is Kanda Kyoichi, and I’ll be your new Ninjutsu instructor.”

“Sensei, I heard you just came back from the battlefield! Can you teach us some practical ninja techniques?” Obito immediately shouted, full of enthusiasm.

This guy...

Kyoichi shot him a look, speechless.

But Obito wasn’t the only one. Shisui, Rin, and the others were also staring at him expectantly.

They all clearly wanted to graduate early and head to the battlefield.

However…

Aside from the Three Basic Techniques, Kyoichi only knew Shadow Clone, Body Flicker, Wild Water Wave, and Water Formation Wall—not exactly suitable for teaching.

Smirking, he looked around and asked, “Do you all think your Three Basic Techniques are already perfect and don’t need any more practice?”

No one answered, but their expressions said it all.

“Fine. For today’s first lesson, I’ll assess your Three Basic Techniques. If you meet my standards, I’ll teach you something new.”

With his mastery of the Three Basic Techniques, Kyoichi was more than capable of teaching them a lesson.

“Let’s head to the training field.”

“Yay!”

At the training field, Kyoichi scanned the group.

There were plenty of talented kids here, but in terms of overall ability, Obito was easily in the top five—despite not having awakened his Sharingan.

Aside from him, Shisui was likely the most promising.

“Obito, Shisui, step forward.”

“Yes!”

Obito leaped into the center enthusiastically, while Shisui followed calmly.

“Both of you, attack me with everything you’ve got!”