Naruto: One Eye Tenseigan

Morning sunlight filtered through the curtains, rousing Tomaru from a fitful sleep. His dreams had been vivid again, pulling him into fragmented memories—visions that felt simultaneously his and someone else's. Each day, he woke feeling a little more attuned to his body, yet the dissonance lingered like an unshakable shadow. 

As he sat up, pressing his fingers to his temples, the dull throb behind his eyes reminded him of the struggle he faced. His body rejected full synchronization, leaving him off-balance, as though he were a puppeteer pulling strings on a mismatched doll. 

Standing, Tomaru stretched, his muscles aching from the grueling training regimen he'd imposed on himself. Meditation, chakra exercises, and sparring dominated his days, yet progress was agonizingly slow. He knew why: this body—the original Tomaru's body—hadn't fully accepted him yet. 

He glanced at the small mirror on his desk, studying his reflection. A determined face stared back at him, his right eye glowing faintly before the Tenseigan's power receded. Even now, the idea of using it in public filled him with unease. The energy surge it brought was intoxicating but unstable, leaving him disoriented and vulnerable. 

---

As the days turned into weeks, Tomaru felt a growing sense of hope. The synchronization of his mind and body was within reach, and with it, the promise of mastering the Tenseigan. His path was far from easy, but he was determined to walk it.

"Patience," he reminded himself each night. 

---

The days slipped by in a blur of routine, the Academy's curriculum settling into a rhythm that Tomaru found both comforting and constricting.

The lessons revolved around the fundamentals—chakra control, shuriken throwing, and basic taijutsu forms. For Tomaru, it was a blessing. It gave him time to acclimate to this unfamiliar world without immediately falling behind the others. He was grateful for the simplicity; it offered him a chance to understand the intricacies of being a ninja at a manageable pace.

Yet, each passing day weighed heavier on his mind. The reality of what it meant to be a shinobi pressed against his consciousness, relentless and demanding. It wasn't just about physical strength—any fool could swing a kunai. The true essence of a ninja lay in the subtleties: reading the battlefield, predicting an opponent's movements, making split-second decisions that could mean life or death. It required a blend of intelligence, adaptability, and composure under pressure, traits that Tomaru knew he would need to cultivate quickly if he wanted to survive here.

During a rare midday break, Tomaru found himself seated beneath the shade of a towering oak on the Academy grounds. The sun filtered through the dense canopy, casting dappled patterns of light and shadow across the soft grass. A cool breeze rustled the leaves, carrying with it the mingled scents of blooming flowers and the distant smoke from village vendors preparing lunchtime meals. He could hear the laughter of children in the distance, a stark contrast to the seriousness that settled within him.

He pulled out his journal, its worn leather cover smooth beneath his fingertips. It had become his constant companion, a place where he could pour his scattered thoughts and observations. The pages were filled with a meticulous record of everything he deemed important—small strategies he devised, training methods he wanted to test, and even detailed notes on his classmates. He flipped through the pages, glancing over a list he had made:

**Goals:**

**Master Basic Taijutsu**: Close the gap in technique and precision. 

**Increase Stamina**: Build endurance for longer training sessions. 

**Control Tenseigan Usage**: Restrict usage to avoid unnecessary strain. 

He paused at the last entry, tapping the page with his pen.

*Tenseigan... It's both a gift and a burden.* He couldn't afford to rely on it too much, not yet. It was a trump card, but using it openly could make him a target for dangerous figures…

Tomaru looked up from his journal, his gaze drifting to the training grounds. He watched his classmates spread out in small groups, engaged in various drills. Naruto's boisterous voice echoed across the field as he attempted to spar with Kiba, who was dodging his wild punches with ease. Sasuke stood at the target range, methodically throwing shuriken, each one hitting dead center. The gaggle of fangirls nearby cheered for him with unrelenting fervor.

Tomaru couldn't help but smile faintly.

*The Uchiha prodigy… Everyone's eyes are on him, but no one's watching the quiet kid taking notes in the corner.* That was fine by him. He preferred to stay under the radar for now, quietly building his strength while others basked in the limelight.

He glanced down at his journal once more, jotting a quick note:

*Power is meaningless if it's wasted. Learn when to use it—and when not to.* 

As the breeze picked up, Tomaru leaned back against the tree, closing his eyes for a moment. The scent of earth and leaves filled his lungs, grounding him. Despite the chaos of the Academy, this brief moment of solitude felt like a small refuge, a chance to reflect on where he was and where he needed to go. 

—

The classroom buzzed with its usual energy as students trickled in. Tomaru slid into his seat near the window, catching snippets of conversation around him. Naruto was loudly complaining to Shikamaru about how boring Iruka-sensei's lectures were, while Ino and Sakura engaged in a heated debate about which of them Sasuke liked more.

"Hey, Tomaru!" a familiar voice called out, breaking through the chatter. He turned to see Ino approaching with her usual confident stride, a playful grin on her face.

"You've been keeping to yourself a lot lately," she said, leaning against his desk.

"What's up with that?"

Tomaru shrugged, his expression neutral.

"Just… focusing on training."

Ino raised an eyebrow.

"Training, huh? You've been awfully quiet for someone working so hard. Are you sure you're not just slacking off?" Her tone was teasing, but her eyes searched his face for a reaction.

Tomaru met her gaze, a faint smirk tugging at the corner of his mouth.

"You'll see soon enough."

"Ooh, confident, are we?" Ino said, leaning in closer.

"Well, don't expect to catch up to me so easily."

Their banter was interrupted as Iruka entered the classroom, clapping his hands to gather everyone's attention.

"All right, settle down, everyone. Today, we'll be focusing on sparring techniques and chakra control. Pair up with someone and get ready for some practical training."

---

That night, Tomaru sat by the window of his quiet apartment, gazing out at the illuminated village. Lanterns dotted the streets of Konoha, their warm glow casting soft shadows that danced in the stillness.

From his vantage point, high up in his quiet apartment, he could see everything.

**Everything.**

he activated the **Tenseigan**, and the world immediately shifted into unparalleled clarity. 

The shift was immediate and overwhelming. The room around him dimmed in comparison to the vibrant, radiant world now unfolding before his gaze. The subtle blue glow from his right eye illuminated his surroundings, but the real marvel lay beyond the window. 

The streets of Konoha were alive with movement, chakra trails painting vivid pathways through the night. Civilians emitted faint, flickering auras, while the shinobi's chakra burned brightly. 

He turned his attention to the **fuinjutsu barriers** scattered across Konoha—shimmering veils of energy that protected its most vital areas. 

The Hokage's office radiated a steady, pulsing glow, a fortress of interwoven seals. The Anbu headquarters was concealed by layers of shifting patterns, the complexity designed to repel even the most advanced sensory abilities. 

For most shinobi, these seals would be an impassable wall, their secrets locked away. Even the **Byakugan**, renowned for its penetrating vision, would falter here. 

The enhanced dojutsu was unparalleled in its clarity and depth—an evolution far beyond the Byakugan.

The Tenseigan's vision wasn't just an enhancement; it was a revelation. The Byakugan could pierce walls and see chakra networks, but it had its limits—obstacles, range, and even focus. Tenseigan obliterated those barriers. 

As his gaze sharpened, Tomaru focused on the village's most shadowed depths. 

The world sharpened into stark clarity. His gaze pierced walls and fuinjutsu barriers, revealing the unseen. In the depths of the Root headquarters, **Danzo Shimura** observed his operatives with an unyielding gaze, his ambition palpable even from a distance. 

Tomaru shivered. Danzo was a man who would stop at nothing to obtain power. If he ever discovered the Tenseigan's existence... 

Shifting his focus, Tomaru turned his gaze to the **Hokage's office**, where **Hiruzen Sarutobi** sat behind his desk. The old man's face was calm, but Tomaru could see the tension in his shoulders as he scanned through a stack of reports. Smoke from his pipe curled lazily into the air, a familiar ritual that masked the Hokage's deep contemplation.

The strain of Tenseigan began to creep into Tomaru's mind. His head throbbed faintly, a warning of the limits of his control. With a soft exhale, he deactivated the dojutsu, the glow fading from his eye as the world returned to its ordinary state.

He leaned back in his chair, letting his gaze drift toward the stars visible beyond the window. His breath steadied, but the images he'd seen lingered, refusing to fade.

"I'm not strong enough," he murmured, his voice low.

"Not yet."

Tenseigan was a gift, but it wasn't enough on its own. The secrets he had glimpsed only reinforced the vastness of the challenges ahead.

Yet, as the village lights flickered in the distance, a quiet determination settled over him.

---

Over the next few days, Tomaru followed a rigorous schedule. Each morning began with stamina drills—running laps until his legs burned. Afternoons were dedicated to taijutsu forms, his punches slowly gaining precision and his stances more stability, each session inching him closer to mastery. 

During sparring sessions, he began to see the fruits of his labor. One afternoon, he managed to dodge Kiba's lunging attack, earning a rare nod of approval from the boisterous boy. Small victories like these fueled him, but they also highlighted how far he still had to go. 

Nearby, Ino was sparring with Sakura, their movements fast and precise. Despite their constant bickering, they were evenly matched, each trying to outdo the other. Ino caught Tomaru's gaze and gave him a quick thumbs-up before focusing back on her match.

In quieter moments, Tomaru studied his peers. Sasuke was relentless, his training a testament to his focus and ambition. Naruto, despite his clumsy techniques, attacked every challenge with a boundless energy that couldn't be ignored. Even **Shikamaru**, often perceived as lazy, had a sharpness to him that Tomaru couldn't overlook. 

—

The next morning, Tomaru altered his routine with a renewed focus.

The village of Konoha was already stirring as he set out for training, the early light casting long shadows across the ground. The scent of fresh dew lingered in the crisp air, mingling with the faint aroma of breakfast being prepared in distant homes. 

The voices of shopkeepers opening their stores and the chatter of early risers filled the quiet streets, painting a picture of life before the rush of the day.

Tomaru started his regimen with a stamina-building circuit, jogging along the perimeter of the village. 

He could feel the uneven terrain beneath his feet—the packed dirt paths, the occasional rocks jutting out, the soft patches of grass. His breath came out in steady puffs of mist as he settled into a rhythm, the sound of his heartbeat merging with the chorus of morning bird songs. 

The trail he chose wound through the training grounds, past the Academy's practice fields, and even skirted close to the forest line, where he could hear the distant calls of wildlife waking up.

When he finished the long-distance run, he paused only briefly before transitioning into sprint intervals. The bursts of speed were demanding, but he relished the burn in his muscles. With each powerful stride, he imagined himself racing against future opponents.

He pushed himself harder, determined to outlast the phantom enemies that drove him forward.

—

Late one evening, Tomaru activated Tenseigan again, his vision cutting through the walls of the village. He traced the chakra threads of his classmates, noting their movements. **Sasuke**, practicing alone, radiated an intensity that was both inspiring and intimidating. 

Tomaru's gaze shifted to **Shikamaru**, who was sitting with his father at the shogi board. The younger Nara looked relaxed, almost bored, as he idly moved his pieces. But there was a sharpness in his eyes—an unspoken awareness that observed everything, even when he didn't seem to be paying attention.

*I remember that look,* Tomaru thought, narrowing his eyes.

*He's been watching me for a while now. Subtle, almost imperceptible, but it's there.* In the academy, Shikamaru had barely spared him a glance, his interest limited only to what directly affected him.

Tomaru could almost recall Shikamaru's bored expression as he slumped over his desk, uninterested in anything outside of his small circle of friends.

Shikamaru's attention had shifted after noticing Tomaru's closeness to Ino. It wasn't jealousy; it was concern, a protective instinct born from their childhood bond.

They had been friends since childhood, their families tied together by history and tradition. Even though Shikamaru seemed lazy, he was someone who cared deeply for those close to him.

Tomaru couldn't help but smirk slightly.

He's sharp, he acknowledged, feeling a mix of respect and caution.

He notices things others miss, even when he pretends not to care.

He recalled the way Shikamaru's gaze would flicker toward him, only briefly, like a shogi player assessing a potential move. It wasn't just idle curiosity; it was a careful evaluation, the kind that weighed risks and benefits.

Shikamaru must have noticed the change in me, Tomaru concluded, feeling a ripple of tension rise in his chest. The shift in his demeanor hadn't gone unnoticed by his peers, though their reactions varied.

Ino, of course, was the first to see it. She accepted it wholeheartedly, her warmth reassuring in a way Tomaru hadn't expected. Then there was Iruka-sensei, who seemed quietly pleased by the change. Sasuke noticed as well, but true to form, he didn't care—his indifference mirroring that of most others in the class.

But Shikamaru's attention never wavered. His subtle, almost imperceptible observations felt like a silent game of shogi.

He's assessing me, Tomaru realized.

Probably wondering if I'm a threat to Ino, or if there's more to my sudden change.

Shikamaru moved another piece on the board.

The next day at the academy, Tomaru met Shikamaru's fleeting glance, giving a barely noticeable nod in return. It wasn't friendship, but it wasn't animosity either. It was something in between—a recognition of each other's perceptiveness, a shared awareness that could shift depending on their next moves.

For now, Tomaru thought, turning away with a faint smile, we'll keep playing this quiet game of observation.