Uchiha Yin had transmigrated into the Naruto world, waking up to find himself a member of the Uchiha clan—and, more unexpectedly, the host of the "Strongest Protagonist System."
But what puzzled him was that, after the system had finished remodeling his body—cleansing his meridians, strengthening his chakra pathways, and enhancing his physique—it promptly vanished.
What Uchiha Yin didn't realize was that the world around him had changed drastically. Several of the heroines and major characters of the Naruto universe had also received mysterious systems.
—Tsunade obtained the "Ultimate Medical Nanny System" and was given a singular main quest: Become Uchiha Yin's wife.
—Mikoto unlocked the "Overprotective Sister System" and received her mission: Become Uchiha Yin's bride.
—Terumi Mei activated the "Strongest Mizukage System," and her quest was clear: Become Uchiha Yin's lover.
...
In the Hyuga compound, Hinata's cheeks flushed deeply as she listened to the voice of the "Strongest Goddess System" in her head. Her eyes spun gently, and a puff of white steam drifted up from her scalp...
---
"The most basic thing for a shinobi is chakra refinement. Only those who can extract chakra have taken the first step on the path of a ninja."
"You all learned chakra refinement last year. Since you've succeeded, you now possess the potential to become full-fledged ninjas."
"Today, I will be teaching you the three fundamental jutsu used most frequently in combat. They are collectively known as the Three Basic Techniques: the Clone Technique, the Substitution Technique, and the Transformation Technique."
At Konohagakure's Ninja Academy, in one of the middle-grade classes, a Chūnin instructor stood before twenty-seven students, delivering his lecture with a textbook in hand.
All the students sat attentively, soaking up every word like sponges—after all, these were techniques they'd soon be tested on.
Uchiha Yin was among them.
He sat by the window, eyes partially closed, his posture relaxed. While the teacher explained the Clone Technique, he half-listened—but his mind had already wandered when it came to the Transformation and Substitution Techniques.
In his opinion, Substitution Jutsu was genuinely practical—it could save a life in battle. The other two? Not so much. As long as he could use them passably, that would suffice.
"I never imagined I'd one day transmigrate into the world of Naruto," Uchiha Yin thought, gazing out the window.
He knew he likely couldn't return to his previous world.
Yes, he was a transmigrator.
He had taken over the body of a minor Uchiha clan member who hadn't even been named in the original work. In fact, it was likely this character had died off-screen before the main story even began.
That seemed confirmed by the memories he inherited—Uchiha Yin had a cousin named Uchiha Mikoto, who had only graduated from the Academy the previous year.
But wait—Uchiha Mikoto had a cousin? There was no mention of that in the manga or databooks. It was all but certain he'd died in the Second or Third Great Ninja War.
The thought made Uchiha Yin feel complicated, even uneasy. Yet when he remembered he had a system, his heart became even more tangled.
When he first arrived in this world, the system awakened, enhanced his physical body, and then... fell silent.
No matter how many times he tried to call out to it, there was no response. It was like it had vanished or gone dormant.
"Isn't the whole appeal of transmigration supposed to be having a cheat-like system? Did I get a defective one?!"
Still, Uchiha Yin had no plans to meddle in world affairs. He thought to himself, As long as I find an excuse to leave the village before the Uchiha Massacre, I can avoid all the trouble.
"Hokage has already ended. Even if I don't do anything special, I should be able to live out a peaceful life."
He was not like Naruto, desperate to change the world or chase recognition. He wanted a quiet, comfortable life with a beautiful wife—or better yet, several beautiful wives.
As for the chaos and danger of the original plot? He had no interest. The further away, the better.
That said, he still wanted to see how his presence would shift the events of this world.
A week was enough for him to assess the timeline. Based on everything he'd seen and heard, the Second Shinobi World War was either underway or on the verge of beginning.
He didn't plan to change history. But even if he wanted a peaceful life, he understood he needed strength to protect himself.
His system may have gone silent, but the body enhancements it provided remained. His chakra reserves were larger, his hand seals faster, and—most importantly—he had awakened the Sharingan.
Not just one tomoe, but two. A fully awakened Two-Tomoe Sharingan.
That gave him a real shot at survival.
At his age, few children had unlocked the Sharingan, and fewer still had reached two tomoe.
Of course, compared to elite jōnin or legendary ninja, Uchiha Yin wasn't that powerful—yet. But inside the Academy, he was nearly unmatched.
Still, he kept his talents hidden.
Danzo was always lurking, and even within the Uchiha clan, politics were dangerous. If he stood out too much, he might draw attention from the wrong people—or even threaten the position of the clan heir. That could put a target on his back.
Riiiing!
The bell marked the end of class.
As students chatted and relaxed, the door opened. The teacher reentered with a girl standing beside him.
She had a delicate face, long vibrant red hair, and a slender frame. Her curled lashes trembled, and her large, jewel-like eyes scanned the classroom nervously. Her soft pink lips were pressed together in unease.
It was none other than Uzumaki Kushina.
Right now, she was just eight or nine years old—a shy little girl—but even at that age, her unique charm was undeniable.
She clearly felt out of place, having just arrived in the unfamiliar environment of Konoha.
"Alright everyone, quiet down!" the teacher called. "We have a new classmate joining us today. Let's give her a warm welcome."
The classroom erupted into polite applause.
In the front row, Minato Namikaze clapped a little too enthusiastically, his eyes brightening the moment he saw her.
"Let's hear a short self-introduction from our new friend."
The teacher gestured encouragingly toward Kushina, who took a deep breath and stepped forward.