Wielding Nen in Naruto [Rock Lee SI]

[Fanfictionlord]

"Lee."

His head rang painfully as the sound echoed in his ears. It felt strangely familiar, though he could swear he had never heard it before. The language being spoken wasn't English either, but an otaku that he was, he instantly recognized it as Japanese.

"Rock Lee! We're in the middle of a spar! What are you spacing out for?!"

The voice rose in pitch, irritation leaking through each word. It stung his ears, pulling him forcefully toward awareness.

He forcefully opened his eyes, only to squint immediately as bright sunlight flooded his face all at once. His vision swam for a moment before settling. Only then did he scan his surroundings.

A boy stood across from him, no older than ten. He had long pale brown hair tied behind his head and stood upright, his features sharp in a way that felt unnatural for someone his age.

There were many things that stood out about him—his strange clothes, open-toed sandals, limbs wrapped in bandages, and lastly his somewhat impatient and annoyed expression as he looked at him—but the strangest part was his eyes.

They were pale.

Not white or gray, but pale lavender, with no visible pupil.

As he looked at him, Lee felt like he was staring through him instead of at him.

'What unique contact lenses,' he thought. 'They almost look real.'

As he looked around, he realized he was standing in an open field. A faint circular boundary marked the ground around him, forming a ring.

Dozens of children, boys and girls around the same age as the pale-eyed boy, surrounded the ring, and he keenly noticed they all wore the same open-toed sandals as well. Not only that, the expressions they gave him were also quite similar—a mix of annoyance and impatience.

A short distance away stood a low building made of wood and plaster. Wide windows. Sliding doors. A long balcony running along the second floor.

'Where am I exactly?' Lee felt increasingly confused about his current situation. The last thing he remembered was coming home from work when a speeding truck slammed into him and darkness enveloped his vision. He felt like he was done for—but the next instant, he woke up here.

As his gaze drifted downward, he coincidentally caught sight of his hands and froze.

'Wait—how did my hands get so small?!'

Moreover, there were callouses in places that made no sense to him—knuckles, palms, the edges of his fingers.

This only made Lee even more confused.

"Pay attention, Lee," the voice said again. "I won't repeat myself."

He turned sharply toward the sound and saw a man standing just outside the ring.

Middle-aged. Broad shoulders. Straight-backed. He wore a green flak jacket over dark clothing, a forehead protector strapped securely across his brow. At its center was a metal plate engraved with a leaf symbol.

The man's eyes were sharp, gazing at him with a stern, slightly scrutinizing expression.

That look alone sent a strange, instinctive knot twisting in his stomach.

Before he could stop himself, words came out of his mouth.

"S-sorry, Sensei."

The sound of his own voice startled him—not only because of how much higher it was than it should be, but also how naturally it came out.

Moreover, how did he suddenly start speaking and understanding Japanese?!

The man gave a curt nod, taking it as confirmation.

"Alright then. Begin!"

His heart skipped.

'Begin what?'

Before he could even react, the pale-eyed boy in front of him moved.

There was no warning. One moment the boy stood three steps away, and the next moment, he was right in front of him. The movement was swift, smooth, and efficient, like a trained fighter.

Lee's eyes widened.

'He's too fast—!'

His mind screamed at him to do something, to get out of the way, but his body refused to move, frozen in place. At the last moment, his arms somehow moved reflexively into a guard, elbows tucked, forearms raised against his chest.

The boy's palm slipped past his defense with ease, prying it open like paper, and then—

Bang!

The palm strike slammed into his chest!

A sharp force detonated behind his ribs, knocking all the air out of his lungs!

He was sent stumbling backward, feet scraping against the dirt before he lost balance entirely and fell flat on his back.

"H—hk—"

His chest felt tight, like someone had pressed a heavy weight against it. He tried to inhale, but only a shallow gasp came out.

'Who the fuck suddenly attacks like that?!' Anger flared in his heart. So what if he's good at fighting—could he just attack anyone as he wished?

Lee swore that once he got up, he would show the little shit the consequences of messing with him. He would call the police and press charges on him for attempted murd—

His thoughts froze all of a sudden as a dull ringing filled his ears.

It grew louder by the second, and he felt something else stir in his head.

At first, it was faint.

Then it came all at once.

"Arghh!"

Lee clutched his head tightly, letting out a pained cry as a splitting headache hit him.

His life in Konoha. Academy lessons. Being told he had no talent for ninjutsu. No aptitude for genjutsu either. Training grounds. Wooden posts. Endless running. Falling. Getting back up.

Countless memories that weren't his flooded his head without warning.

Lee lay still on the ground, breathing heavily, staring up at the sky.

He understood it now. He had died and then… crossed over to the Naruto world… as Rock Lee.

Moreover, he could be sure this wasn't a dream. The memories were too detailed and consistent for it to be one. He didn't feel like someone borrowing them, but like someone who had always had them.

Transmigrating into an anime?

The realization didn't excite him. It didn't terrify him either, because his attention was occupied by something else—something extremely wrong. He felt it instinctively.

It started as a faint warmth deep in his chest, then spread quickly—like a current moving without direction—through his arms, legs, neck, until his entire body felt like it was buzzing under the skin. Then it leaked outward, drifting into the air.

It didn't hurt.

But it felt dangerous.

Not in an immediate way—more like realizing you were bleeding without seeing the wound.

His instincts screamed at him to contain it. To pull it back in. To keep whatever this was from leaking out.

Without thinking, he focused inward.

'Stay… inside!'

He imagined pulling everything back toward himself. Holding it close. Not letting it escape.

The warmth resisted, pushing outward harder, like water against a cracked wall. Lee gritted his teeth and forced his attention tighter, wrapping his awareness around his body like a barrier.

He didn't even know what he was trying to do at that moment. He just followed his instincts.

But It proved to be effective as slowly, the warmth began to settle, then completely eased.

But he could tell it hadn't disappeared completely. It still lingered under his skin—just no longer rushing outward.

Only then did Lee dare to let out a breath he realised he was holding in.

"Lee?"

A shadow fell over him.

"Lee, what happened?" Akira asked, crouching beside him. The strictness from earlier was gone, replaced with clear concern.

Neji had stepped closer as well, standing a short distance away. His brows were furrowed slightly, pale eyes fixed on Lee's face, which looked even paler.

"Sensei…" Lee tried to respond, uttering a single word before the tension he'd been holding snapped all at once and his vision blurred.

Then his eyes rolled back, and everything went black.

Akira caught him immediately. "Lee! Can you hear me?"

Neji stiffened. "Did I—"

"No," Akira cut him off. "It's not that."

He lifted Lee carefully. "Class dismissed. I'm taking him to the infirmary."

Neji watched silently as he carried Lee away, a faint crease forming between his brows.

'Did I hit him too hard?' he thought, clenching his fist. He wondered if he should have held back a little.

 

[To-be-hero-X]

Moment I see Rock Lee fic I immediately hit watch

 

[Kolarthecool]

Woo, Lee Number 2!! ️ (Gai is of course Number 1)

 

[To-be-hero-X]

Woo, Lee Number 2!! ️ (Gai is of course Number 1)

Click to shrink...

Smh guy is indeed number one but he retired it's passing the torch to the new future number one it's called legacy

 

[Kolarthecool]

Smh guy is indeed number one but he retired it's passing the torch to the new future number one it's called legacy

Click to shrink...

As if retirement stops the Blue Beast from sitting in the number one position!! Till the day he dies Gai is #1, Rock Lee #2 and Metal Lee slowly inching his way to #3.

Heck, knowing the pure land exists and is escapable by some Uchiha scrubs, death may not even change those ranks.

 

[To-be-hero-X]

As if retirement stops the Blue Beast from sitting in the number one position!! Till the day he dies Gai is #1, Rock Lee #2 and Metal Lee slowly inching his way to #3.

Heck, knowing the pure land exists and is escapable by some Uchiha scrubs, death may not even change those ranks.

Click to shrink...

Will all can honestly say I respect you for your YOUTH passion and your loyalty and devotion for mighty guy respect man

 

[Uthalem]

Honestly anything involving HxH is pretty rare so I will be watching to see more
Thanks for the chapter

 

[Fanfictionlord]

As Lee woke up, a plain white ceiling greeted him. Sunlight filtered in through a window to his side, casting a warm rectangle across the floor.

"Damn it…"

He felt like absolute shit.

His head throbbed dully, thoughts struggling to form. His limbs felt heavy and sluggish, and a faint weakness enveloped his whole body as if he had just run a marathon.

Even breathing felt tiring.

He turned his head slightly. The room was small but clean. Two simple beds were placed parallel to each other, separated by a low curtain. Cabinets lined one wall, neatly stocked with jars, folded cloth, and medical supplies. A faint medicinal scent lingered in the air.

"Infirmary?" Lee muttered. His voice sounded muffled even to his own ears. "…Makes sense."

Earlier, he had genuinely felt like he was about to die—as if something vital was being drained straight out of him. Just recalling that sensation sent a chill through him.

He never wanted to experience something like that ever again!

Lee hesitated for a second, then closed his eyes and diverted his attention inward, attempting to check if he could still sense that warmth.

The next moment, he froze.

The warmth was still there. And it was still leaking!

Feeling how thinner it was than before, it didn't take a genius to realize what had happened.

It should have been drifting out of his body while he was unconscious!

Lee's expression darkened. No wonder he felt so horrible upon waking up. This thing had to be tied to his body somehow.

Without wasting another second, he focused and instinctively used the same method he had earlier. He gathered his awareness and wrapped it tightly around himself, hugging the escaping warmth close to his skin—like forming an invisible shroud around his body.

The effect was immediate.

The outward flow stopped, settling beneath his skin instead of bleeding away. Only then did Lee let out a quiet sigh of relief.

More than that, he could faintly feel it beginning to recover. The pace was worse than a snail, but as long as it could return to its previous level, Lee wouldn't complain. What he truly feared was the possibility that the loss was permanent and he would have to live out his second life in this constant state of exhaustion, like he had contracted some incurable illness.

That would have been a nightmare.

The only downside was that maintaining this shroud required conscious effort.

Lee let out a sigh.

He hadn't even had the time to properly process his transmigration, and he was already dealing with something like this. It seemed his rotten luck had followed him across worlds too.

And according to Rock Lee's memories, whatever this warmth was, it wasn't chakra. It was something else entirely.

As for his chakra, it had completely vanished without a trace. He couldn't sense even a wisp of it inside his body. He couldn't spare his attention to attempt refining it either.

But his experience as a veteran otaku came into play here.

Sudden awakening through shock and trauma. Uncontrolled leakage. Stabilized through a unique method that required constant maintenance. Closely tied to the body's vitality.

There weren't many things that behaved like that.

But if his speculation was correct, that would be insane. This was the world of Naruto. Logically speaking, chakra should be the main driving force here. Other systems of power shouldn't exist. Then again… transmigration itself wasn't exactly logical either.

"Whatever…"

Lee exhaled softly.

There was an easy way to test his suspicion. All he needed was a glass of water.

As maintaining the shroud gradually became less demanding, Lee carefully loosened his grip just a little—not enough to let it slip, just enough that it stopped feeling like he was clenching his teeth nonstop.

Only then did he slowly open his eyes and lean back against the bed.

Naruto's world.

Rock Lee's body.

And something strange inside him that wasn't chakra.

A lot had changed in less than a day.

"…Guess I'll have to take this one step at a time," he murmured.

Creak!

Just then, the infirmary door slid open, the sound almost causing him to lose focus!

His breath hitched, the warmth inside him stirring in response. Lee quickly tightened his awareness, pulling everything back into place before it could leak again.

Only after it stabilized did he look toward the door—indignation flickering in his eyes. But he quickly reined it in upon seeing who it was.

Akira-sensei.

Their homeroom teacher at the Ninja Academy. Also the one who should have brought him to the infirmary in the first place.

The chūnin was in charge of most of their grade's core subjects. He was known for being strict, but from Rock Lee's memories, it was clear that he cared a lot about his students.

Lee himself was proof of that.

Despite performing terribly in every subject except taijutsu since enrollment, Akira-sensei had never once failed him. Granted, it had been under the condition that Lee defeat one of the students in the top ten ranking in taijutsu sparring.

Regardless, original Lee had nothing but gratitude toward the man. Without him, he would most likely still be stuck repeating first grade.

Carefully maintaining the shroud, Lee tried to straighten up. "Akira-sensei."

"It's alright," Akira waved a hand dismissively as he approached the bed. "Try not to move too much for now. You're supposed to be resting. I already spoke with the medic-nin in charge. Your body shows clear signs of chakra exhaustion."

His eyes narrowed slightly. "I also sensed a sudden discharge of chakra from you earlier. Did it suddenly go out of control?"

Lee fell silent for half a second, quietly weighing his response, before shaking his head. "I… don't really know how it happened, sensei. One moment everything was fine, and the next it started acting strangely."

"Hm." Akira nodded. "Chakra is closely tied to both mental and physical condition. Sudden fluctuations aren't unheard of, especially under stress."

He added seriously, "I know you train really hard, Lee—perhaps more than anyone in your class. But don't neglect your health while you're at it. It'll do more harm than good."

Lee nodded. "I understand, sensei. I'll keep that in mind."

Silence settled over the room.

"Lee," Akira said suddenly, his tone shifting. "There's something I need to talk to you about."

Lee stiffened slightly, catching a hint of graveness in his tone. "…Please, go ahead, sensei."

"You're aware that this year's end-of-semester exams are in two months, correct?"

"Of course," Lee replied. How could he not know about it? The fear of failing it had made the original almost double his training intensity over the last few weeks.

Since they were in their final year, these exams weren't just tests; they were also graduation assessments. Passing meant becoming a genin and being assigned to a squad. Failing meant repeating the year.

Akira studied him for a moment before speaking plainly. "Then I'll be blunt. As you are now, I don't think you'll be able to graduate."

Lee's heart skipped a beat.

Akira continued without pause. "Originally, you were admitted into the academy despite having no talent for ninjutsu or genjutsu because there are precedents—exceptional taijutsu specialists who later went on to become outstanding ninja."

He folded his arms. "But at present, while your taijutsu is good, it isn't at the level that can be considered truly exceptional. Not to the degree where it can compensate for your lack of ninjutsu."

"Any of the students in the top three ranking in your class could defeat you in spars," Akira said frankly. "Which is why I recommend you delay graduation and take another year to refine your fundamentals."

He added, "And you don't need to worry about it affecting your future. It won't appear on your record as failing a grade."

Lee's expression darkened. Another bombshell. Just how many will he get today, damn it!

If he had transmigrated as anyone else, he wouldn't mind spending another year in the academy. He would even prefer it. It would give him more time to stabilize himself and explore the unknown thing in his body.

But he was Rock Lee!

He was indeed no match for the students at the top. He was never pitted against them in any end-of-semester exams by Akira-sensei for a reason.

All of them were from ninja clans.

There was no need to say anything about Neji. The other two were from the Inuzuka clan and the Akimichi clan, respectively. They all had their clan's own advanced taijutsu techniques and likely received regular guidance from senior ninjas.

But what about him? He was just a civilian with a slightly stronger body due to the relentless physical conditioning he put himself through and a bit of taijutsu talent. But he wasn't able to fully utilize either of them at the moment due to the lack of technique.

The only things he knew were the basics taught in the academy. You couldn't win with just that.

As the saying went, even a master chef couldn't cook without ingredients.

Everything would change once he graduated and met Guy!

But if he didn't graduate now… there was no guarantee he'd ever be assigned to Guy's squad. Squad assignments weren't destiny. They were logistics—timing, paperwork, convenience. One small change was enough to derail everything.

Lee clenched his fist beneath the blanket.

Countless thoughts surged through his mind in a rush.

Taking a slow breath, careful not to disrupt the invisible shroud around him, Lee shifted slightly and bowed his head.

"Sensei," he spoke loudly, gathering every ounce of determination he could muster. "Please… give me another chance!"

If he was Lee, then he would do what Lee always did.

He wouldn't give up. He would sincerely ask for a chance to prove himself!

At Lee's words, Akira—who had been standing near the foot of the bed—paused mid-step and turned fully to face him. His expression, however, remained unchanged.

Lee continued, his voice firm. "I don't want to fall behind. I want to graduate with everyone else and stand on the same starting line. I want to defeat Neji!"

For a moment, Akira simply looked at him.

"Lee," he said at last, his tone firm but not harsh, "you're misunderstanding me." He lowered his arms, letting them rest at his sides. "I'm not failing you."

Lee's fingers twitched.

"As I've already told you," Akira continued, "this isn't a punishment. It's a precaution. The Academy exists to prepare children to survive as ninja. Sending someone into the field before they're ready helps no one—not you, and not the squad you'd be assigned to."

He shook his head once. "And this wasn't only my decision. The principal agrees with me."

For a split second, surprise flickered across Lee's face.

The principal?

The word felt… wrong.

From what he remembered, the Ninja Academy didn't function like an ordinary school. There was administration, sure, but the highest authority was largely symbolic. There wasn't a true principal in the usual sense—the position was nominally held by the Hokage.

Sarutobi Hiruzen.

Lee swallowed.

If the Hokage was paying attention to this, then things were far more serious than he'd thought.

Still, backing down wasn't an option.

The Academy's graduation assessment was similar to the yearly exams, consisting of two main parts: theoretical and practical. The former was self-explanatory. The latter tested ninjutsu—primarily the three basic body techniques—and taijutsu through sparring.

Taijutsu wasn't a problem. The written exam wasn't either. The old Lee had struggled with it, yes, but that didn't mean he would. His years of higher education hadn't been for nothing.

Ninjutsu, however, was another matter entirely.

It wasn't that he lacked intelligence. Once chakra left his body, it simply refused to behave. It moved unpredictably, slipping out of his control as if rejecting him outright. It felt less like a lack of skill and more like a flaw in his body itself. If he had to guess, Might Guy probably suffered from something similar.

And now?

Now he didn't even have chakra!

He didn't know if he would even be able to learn the Eight Gates like in the original series anymore!

To put it simply, whether it was this year or the next, he couldn't graduate the conventional way. The only path forward was through Akira-sensei's support—just as it always had been—and the principal's leniency, mercy, or whatever form that approval took.

Lee let out a slow breath, steadying himself. He lifted his head and met Akira's gaze, his eyes clear and unwavering.

"Even so," he said firmly, "I still want to graduate."

Akira studied him in silence, looking at his eyes gleaming with determination. Almost imperceptibly, the corner of his mouth curled upward.

"You really are stubborn," he remarked plainly.

Lee didn't respond.

Akira turned his head slightly, staring at the cabinets lining the wall as if organizing his thoughts. When he spoke again, his voice was lower.

"Alright," he said. "If you want a chance, I'll give you one."

"I've never let you pass purely out of sympathy. Every inch you gained here, you earned through your own hard work. This time will be no different. Don't expect any leniency or preferential treatment from me or the principal."

The words settled heavily in the air.

"I understand," Lee said at once.

"It's the same as your end-of-semester exams. But since it's graduation, it's only fair that we set the bar a bit higher, right?"

The corner of Akira's libs curved slightly as he continued, "You just have to defeat one of the students ranked in the top three in taijutsu."

Lee's breath hitched almost imperceptibly.

Top three.

Didn't that mean Neji… and the others?

Lee clenched his jaw. That was… difficult. But in the end, he still nodded heavily.

"And," Akira continued, "you must pass the written portion. And I mean not barely scrape by. Pass."

Lee nodded again. That one was acceptable.

"If you succeed," Akira said, "I'll acknowledge that your taijutsu is exceptional enough to compensate for your lack of ninjutsu. If you fail—" He didn't finish the sentence.

He didn't need to.

Lee absorbed the conditions in silence. They were harsh and as it stood, he had absolutely no confidence in fulfilling the first one.

But what other option did he have? He had to accept it anyway.

"I won't disappoint you," he managed to mutter at last.

Akira watched him for a moment, then gave a small nod. "I hope not."

There was a brief lull. The tension didn't disappear, but it softened, like a rope no longer being pulled taut.

Then Lee spoke again.

"Sensei," he said hesitantly "I have another request."

Akira raised an eyebrow. "You're pushing your luck."

"I know," Lee admitted with a faint, wry smile. "But I still need to ask."

"…Go on."

"I want a month of leave from the Academy."

Akira's brow furrowed. "A month? For what?"

"To train for the assessment," Lee replied without hesitation.

Akira stared at him.

"A month is a long time," he said slowly. "And your body—" his gaze flicked briefly to Lee's chest, "—isn't in ideal condition right now."

"I'll be careful," Lee said. "But if I want to even have a shot at defeating any of those three guys, I need time. Real time. Not just after classes. If I keep training the way I have been, nothing will change."

Silence stretched between them.

Akira's fingers tapped lightly against his arm. Seconds passed. Finally, he sighed.

"…Alright," he said. "Leave granted."

Lee's head snapped up.

"But," Akira added sharply, "don't overdo it. I don't want to hear from anyone you've injured yourself."

"I understand," Lee said earnestly.

Akira studied his face one last time, then nodded. "Rest today. You'll be discharged by evening."

He turned and walked toward the door, pausing only once.

"Lee," he said without looking back. "I have high expectations for you. Don't disappoint me."

The door slid shut.

The room fell silent.

Lee lay back against the bed, staring up at the ceiling. His awareness remained wrapped tightly around that strange warmth, holding it in place, feeling it pulse faintly beneath his skin.

A month.

One chance.

If the thing inside his body turned out to be what he speculated, then it might make him or break him.

"…Is this what they call a hellish start?" Lee wondered.

...

A/N : I'll try to publish the next chapter by tommorow evening. Though its titled "Water Divination test," so you can probably guess what it's about. But feel free to guess his aura type in the comments.

 

[To-be-hero-X]

My boy going on training Arc also it's ironic him losing chakra doesn't effect him at all since Lee barely has any nen is literally perfect for someone like Lee