Kōsuke had stayed up all night binge-watching Naruto. Just as he was catching up on the last few episodes, his mind suddenly went blank. When he opened his eyes again, he was no longer in his own room.
The walls around him were wooden, the beams old and rustic—like something straight out of a historical village. He pushed himself upright, still dizzy, and scanned the unfamiliar surroundings. None of this belonged to him. His heartbeat quickened as he stumbled toward a mirror.
A handsome young man with short, spiky hair stared back. The face was his—almost exactly—but the hairstyle and clothing were different. He wore a high-collared robe he recognized immediately, and on his back…
…was a fan.
The Uchiha clan crest.
He froze completely.
"Hold on… no way. Don't tell me I actually—"
He rushed to the window. In the distance, carved into the great mountain overlooking the village, were four colossal stone faces: the First, Second, Third, and Fourth Hokage.
That was it. No prank could be this elaborate.
He had actually crossed over.
But instead of excitement, a heavy dread pooled in his stomach.
This wasn't some hot-blooded anime fantasy. This was a world where death was common—where shinobi fell in battle every single day. And worse still, he had landed in the Uchiha clan… on the brink of its annihilation.
A stabbing pain burst through his head. Memories—countless memories—forced their way into his mind. He groaned and clutched his skull until the agony slowly faded.
When he finally steadied himself, his expression twisted into a bitter grimace.
Konoha Year 54.
The Fourth Hokage had already died during the Nine-Tails incident. The village leadership suspected the Uchiha and had pushed the entire clan to the outskirts, isolating them from the village center. He knew from the original story that the attack had nothing to do with the Uchiha. It was the work of Uchiha Obito—already long separated from the clan.
But politics didn't care for truth.
Distrust festered. Tensions rose. And in the end, the Uchiha would be destroyed. Itachi—son of the clan leader—would raise his blade against his own family. Obito, twisted by grief and madness, would help push the clan toward ruin.
Kōsuke couldn't understand how two people of Uchiha blood could go so far as to butcher their own kin. Compared to them, even Danzo and the Third Hokage seemed less monstrous.
As a transmigrator, he felt only disbelief and anger.
The Uchiha had once been a true powerhouse. With the Senju clan long diminished, no other clan in Konoha could match them. For years, they had carried half of the village's military strength—and yet this was the fate that awaited them.
He drew a deep breath.
His parents in this world had already died in the Second Great Ninja War, killed by Cloud and Stone shinobi. The faces in his inherited memories were identical to the parents he remembered from his previous life.
His chest tightened with rage.
And soon, the clan that had given so much to this village would be massacred.
He looked at his reflection again. A faint red glow shimmered in his eyes. A single-tomoe Sharingan flickered back at him. It was unimpressive—nothing like Sasuke's early genius or Itachi's monstrous talent—but it still marked him as an Uchiha.
Which meant that after he died… his eyes would be taken. Harvested. Experimented on.
He shuddered. At least a one-tomoe Sharingan wasn't worth enough to be strapped onto Danzo's arm. More likely, he'd just end up as some discarded lab material.
Still… not exactly reassuring.
He let out a long sigh.
With just a one-tomoe Sharingan, he stood no chance against Itachi or Obito. Escape? Impossible. Any Uchiha who tried to flee would instantly become a rogue ninja and be hunted down. And Danzo's Root operatives were merciless.
Worse yet, his grandfather was still alive in this world—an elder of the Uchiha clan, respected even by Uchiha Fugaku. If Kōsuke wanted to run, he'd have to convince the old man first.
That alone made escape nearly impossible.
Just as he was drowning in frustration, a cold, mechanical voice echoed in his mind.
"Transmigrator detected. Auto-Training System initialization in progress."
"Initialization complete."
Kōsuke's eyes widened. His heart leapt.
A system.
A real system.
And judging from its tone—an incredibly powerful one.
Auto-training? A system that could strengthen him automatically? If he had three full years before the massacre…
Maybe—just maybe—he could stand against Itachi and Obito one day.
A faint thrill shivered up his spine. He had just grabbed a lifeline.
He straightened.
"System, introduce yourself. What functions do you have?"
The voice responded crisply:
"This system is the Auto-Training System."
"It assists the host in creating training programs and executing them automatically."
"The host may open the personal training panel to view progress."
Hope surged through him—real, solid hope for the first time since he opened his eyes.
Maybe fate wasn't as fixed as he thought.
Maybe… he could survive.