Chapter Text
The last things Yoichi Isagi remembered of his nineteen years were the suffocating, stale smell of bleached linens, the rhythmic, exhausting beep of a heart monitor, and the crushing weight of a dream left entirely in the dark.
He had spent his final days on earth staring at a cracked phone screen, watching grainy, leaked practice room videos of other trainees who had made it.
His own agency contract had been torn up long ago. When his family fell into sudden financial ruin and illness, he hadn't been allowed the luxury of a choice.
He had quietly packed his bags, left the dorms, and traded the stage lights for double shifts at a convenience store until his own health collapsed. His body had failed him, but the quiet, desperate longing to stand under the spotlight never truly faded. It had burned in his chest like a phantom limb until the monitor beside him finally flatlined.
Then, the static stopped. And he breathed in.
A sharp, overwhelming rush of floor wax, industrial air conditioning, and cheap body spray filled his lungs, shocking his senses awake. Isagi gasped, his hands flying to his chest instantly.
His heart was beating—vibrant, rhythmic, and incredibly steady.
He wasn't staring at a water-stained hospital ceiling. He was standing on a highly polished hardwood floor, surrounded by walls of pristine, seamless mirrors.
Looking up, he met his own eyes. The face staring back was undeniably his, but younger—seventeen years old, entirely free of the hollow exhaustion and pale sickness that had defined his final months.
His dark hair was slightly damp from sweat, framing bright, strikingly clear blue eyes. He was wearing an oversized navy training tee with the stark white ‘Blue Lock Entertainment’ logo stamped boldly across the chest.
I'm back, his mind whispered, the realization hitting him like a physical blow. I’m seventeen again. Before the debt, before the sickness... I'm back in the trainee dorms.
Before he could fully process the miracle of his own breathing, a high-pitched, digital chime echoed directly inside his head.
[ System Initializing...]
[ Host Verified: Yoichi Isagi (Age: 17) ]
[ Current Status: Blue Lock Entertainment – Debut Project Class ]
[ Trait Loaded: The Phantom Veteran (Memories and muscle memory from your previous timeline have been compressed and preserved). ]
[ System Objective: Assist the host in achieving absolute center dominance. ]
Isagi blinked, his eyes widening as a translucent blue floating status screen materialized in his field of vision.
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[ TRAINEE PROFILE: YOICHI ISAGI ]
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- Vocal Stability: Level 42/100 (Sub-Vocal Optimal)
- Dance Precision: Level 65/100 (Fluidity/Spatial Awareness: EX)
- Expression/Stage Presence: Level 58/100
- Stamina: Level 38/100
[CURRENT QUEST]: The First Rehearsal
- Objective: Complete the run-through without dropping a single beat.
- Reward: +2 Stamina, +1 Vocal Stability, Unlocking the Skill Shop.
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"If you're done staring at your own reflection, Isagi, we have a track to run," a cool, aristocratic voice drawled from the corner of the room, shattering the digital silence.
Isagi turned his head, his pulse spiking as the floating screen melted into the air.
Leaning against the mirrored wall near the stereo system was Sae Itoshi. At seventeen, Sae was already a myth within the industry—a prodigy producer, a musical savant, and the agency's absolute standard for technical dance precision. He didn't look up from his tablet, his eyes icy and entirely fixed on the wave-forms of the track.
Nearby, Vivian Hugo, the group’s resident powerhouse main vocalist, was quietly re-tying his high-top sneakers, his massive frame shifting as he stretched.
Across the room, Bunny Iglesias, the explosive main rapper, leaned casually against a wooden ballet barre, humming a rapid-fire rhythm track under his breath, his fingers tapping against his thigh in perfect triplets.
"Right. Sorry," Isagi said automatically.
His voice came out clear and smooth, carrying a natural, melodic resonance that surprised even him.
In his past timeline, Isagi had been so buried under the stress of his family's looming crisis that his voice had always been rough, his movements stiff and anxious. He had been a ghost in this room, a lower-tier trainee accidentally sorted into a group of giants.
"Don't bother apologizing to him, Yoichi," a smooth, theatrical voice cut in from the center of the floor.
Michael Kaiser stepped forward, deliberately cutting into Isagi's line of sight. His blue-streaked hair caught the harsh fluorescent lights, and his presence practically demanded the room's attention.
He tilted his head, his sharp, calculating blue eyes narrowing as he looked down at Isagi. A mocking, effortless smirk touched his lips. "Though you do look a bit different today. Did you finally realize who the center of this group is? You've been staring at me through the glass for ten minutes."
In his first life, Isagi would have looked down, offered a timid apology, and shrunk into the background to avoid Kaiser's sharp tongue and intense psychological pressure. Kaiser was a predator who fed on the weakness of other trainees, securing his spot at the top by breaking anyone who couldn't stand his glare.
This time, Isagi didn't look away. He looked right back into Kaiser's eyes. His expression was calm, grounded, and intensely focused, tempered by the quiet gravity of someone who had already seen the end of his life.
"I'm just ready to start," Isagi said quietly. He didn't wait for Kaiser's permission. He simply stepped past him, taking his assigned slot in the back-left corner of the formation.
Kaiser’s eyebrows raised a fraction of an inch at the lack of reaction. The smirk faded from his lips, replaced by a sudden, sharp curiosity.
The air between them grew heavy, the casual dismissiveness in Kaiser's posture hardening into something far more attentive. "Fascinating. Let's see if your feet can back up that look in your eyes, little rookie."
"Running the title track demo from the top," Sae announced, his voice devoid of emotion. "Don't mess up the spacing on the second verse. I won't rewrite the blockings just because someone lacks spatial awareness."
Sae hit the play button on his tablet.
The heavy, synth-driven electronic beat filled the room, the bass vibrating through the hardwood floor and up into the soles of Isagi's shoes.
The choreography was notoriously complex, a fast-paced, contemporary hip-hop style created by an overseas choreographer, requiring absolute body isolation, sudden stops, and intricate floor work.
In his past life, Isagi had struggled to keep up with the sheer speed of the transitions. But now, with the system's ‘Phantom Veteran’ trait active, the years he spent analyzing, studying, and breaking down idol choreographies during his post-trainee life flooded his consciousness. He didn't just know the steps; he knew the mechanical logic behind them.
As the first verse hit, the five of them moved in unison.
Kaiser took the center, his movements incredibly sharp, aggressive, and theatrical. He was a natural performer, pulling the eye toward him with every extension of his arms. Sae flanked the right, moving with the cold, mathematical perfection of a machine—never a millimeter out of place, never a millisecond behind the beat.
But as the formation shifted, something unexpected happened.
Isagi glided into the secondary line. His movements weren't stiff anymore; they were remarkably fluid. His core was locked perfectly, allowing him to execute a sudden chest isolation and a sharp, blind pivot that usually left him stumbling.
Because his mind was free of the anxiety that used to paralyze him, his natural visual charm—the elegant slope of his shoulders, the precise angle of his chin—was on full display.
Left foot back, weight transfer to the heel, drop the shoulder on the eighth count, Isagi thought, his body executing the command before the thought could even finish.
[ System Alert: Perfect Execution! Dance Flow Sync: 92% ]
Vivian and Bunny shifted to the wings, clearing the lane for a synchronized line-up. Isagi found himself standing directly parallel to Kaiser.
Kaiser, noticing the sudden presence beside him, threw an extra burst of power into his next movement, a sharp, sweeping arm extension meant to dominate the frame. In the past, this would have thrown Isagi off his rhythm, forcing him to overcompensate.
Instead, Isagi used his enhanced spatial awareness. He didn't try to mimic Kaiser's aggressive style. He played the contrast. Where Kaiser was sharp and explosive, Isagi was incredibly smooth and controlled, absorbing the energy of the beat and delivering a clean, elegant counter-balance that actually made the entire formation look cohesive.
Sae’s eyes flicked up from his tablet, tracking Isagi's silhouette through the mirror. The prodigy’s brow twitched slightly—a minute sign of surprise from someone who rarely acknowledged the existence of others.
The song transitioned into the pre-chorus. The beat dropped its heavy bass, switching to a stripped-back electric guitar loop. It was Isagi's part—the crucial bridge that needed to ground the track before the main vocals exploded.
He stepped into the center lane. He locked his eyes onto his reflection, treating the mirror with the exact same intensity he would give a live broadcasting camera. He took a breath, expanding his diaphragm just as he had practiced in his countless hours of lonely vocal training in his past life.
“Hold the breath before the shadow falls... we rewrite the stars within these walls..."
The vocal delivery was stunningly steady. It wasn't the roaring, dramatic belt of a main vocal like Hugo, but a sweet, clear, and perfectly pitched tone.
It was light enough to feel effortless, yet grounded enough to anchor Bunny's previous fast-paced rap section. The melody flowed through the room like a silk thread, smoothing out the transition perfectly.
When the chorus hit, Hugo stepped forward, launching into his powerhouse of high notes, backed by the solid, unyielding choreography of the rest of the group. Throughout the entire three minute run, Isagi didn't drop a single beat, his positioning flawless, his breath control immaculate.
The song ended with a sharp, synchronized hit on the final bass note.
The room fell completely silent, save for the sound of five teenagers breathing heavily in the air-conditioned space.
Isagi remained in the final pose for a split second before relaxing his shoulders. He wiped the sweat from his forehead with the back of his hand, his heart pounding with an exhilarating rush he hadn't felt in a lifetime.
Suddenly, a series of digital banners flashed across his eyes.
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[QUEST COMPLETED: THE FIRST REHEARSAL]
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- Performance Rating: A+
- Rewards Received:
* Stamina +2 (Current: 40/100)
* Vocal Stability +1 (Current: 43/100)
- [System Feature Unlocked]: Skill Shop & Detailed Trait Analysis.
- New Trait Discovered by Group Members: "The Quiet Storm"
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He quietly dismissed the screen, keeping his face neutral.
Sae Itoshi stood up from his leaning position against the wall.
He walked slowly toward the center of the floor, his eyes fixed entirely on Isagi. The cold, mechanical indifference that usually wrapped around Sae seemed to have a microscopic crack in it.
"Isagi," Sae said, his voice flat but carrying an undeniable weight. "You changed your footwork on the second transition. You didn't drag your weight behind the beat like you did on Tuesday."
"I realized I was losing momentum by keeping my heels flat," Isagi replied honestly, meeting Sae's gaze without a hint of fear. "If I stay on my toes during the pivot, I can clear the lane for Bunny's entrance half a second faster."
Bunny let out a low whistle, leaning back against the barre. "Hey, he's right. I usually have to adjust my stride so I don't clip your shoulder, Yoichi. Today, the lane was completely open. It felt great."
Sae stared at Isagi for a long moment, as if trying to decipher how a trainee who had been underperforming for months had suddenly developed the analytical precision of a veteran producer.
"The vocal transition into Hugo's line was also perfectly balanced. Keep that exact volume for tomorrow's recording. If you deviate by even a fraction of a decibel, I'm cutting your lines."
"Understood," Isagi said, nodding.
"Well, well. Look at our little rookie go," Kaiser's voice cut through the praise, dripping with a strange, complex tone.
He walked over from the water station, holding a bottle in one hand. He didn't look angry; rather, his blue eyes were alight with a sharp, hunting intensity.
He stopped just a couple of feet away from Isagi, his height allowing him to look down slightly. He leaned in, his blue-streaked hair shifting over his shoulder.
"You've been hiding your teeth, haven't you, Yoichi?" Kaiser murmured, his voice low enough that it didn't carry to the others.
There was no mockery in his expression now—only an intense, focused scrutiny. "That wasn't the dancing of someone who's afraid of the dark. You looked like you knew exactly where every single one of us was going to step before we even did it."
"Maybe I just paid attention," Isagi replied, his voice steady, refusing to back down from the overwhelming presence Kaiser naturally exuded.
Kaiser’s lips curled into a slow, arrogant smile—one that didn't reach his eyes, which remained entirely analytical.
He reached out, his hand hovering near Isagi's shoulder for a brief moment before he tapped Isagi's collarbone with two fingers. "Don't get too comfortable, rookie. The center spot belongs to me. But... at least you've finally become interesting enough to watch."
The atmosphere was entirely dictated by the brutal, unforgiving laws of survival and talent.
Kaiser viewed Isagi as an unexpected, fascinating riddle that had suddenly appeared in his kingdom.
Sae saw him as a newly sharpened instrument that could actually execute his complex arrangements.
Isagi knew this. He wasn't looking for friends. He had a second chance at life, a system in his head, and a burning desire to claim the stage he had been denied.
Later that evening, after the formal evaluation had concluded, the group moved to the smaller vocal studio on the third floor for individual part checking.
The room was soundproofed with grey foam panels, a high end condenser microphone hanging in the center behind a pop filter.
Hugo was currently inside the booth, executing a flawless and powerful belt that made the glass of the observation room vibrate slightly.
"He's too loud on the mid-tones," Sae muttered from the mixing console, his fingers adjusting the sliders. "Hugo, drop the volume on the sustain. You're drowning out the sub-vocal track that comes in underneath you."
"Got it, Sae," Hugo's voice came through the talkback monitor, sounding slightly winded but entirely cooperative.
Isagi sat on the leather sofa at the back of the studio, holding his lyric sheet. He quietly pulled up his status screen, testing the system's interface while the others were occupied.
System, open the Skill Shop, he thought.
A virtual menu unfurled in his mind.
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[ SYSTEM SKILL SHOP ]
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Available Points: 0 (Earned via Quests/Evaluations)
[LOCK ON STAGE] (Passive - Level 1)
- Description: Automatically adjusts eye contact toward the active camera or judge with highest influence.
- Cost: 5 Points
[VIBRATO REFINEMENT] (Active - Level 1)
- Description: Enhances the stability of held notes under high cardiovascular stress.
- Cost: 10 Points
[STAMINA BOOSTER] (Passive - Level 1)
- Description: Reduces the fatigue rate during continuous choreography by 5%.
- Cost: 8 Points
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I'm completely at base level, Isagi realized, analyzing the options. But my actual skills are higher than my level suggests because of my past life's experience. If I can level up these stats on top of my existing knowledge, I won't just be able to keep up—I'll be completely unstoppable.
"Isagi, get in the booth," Sae's sharp voice broke his train of thought.
Isagi stood up, carefully folding his lyric sheet, and walked into the heavy, soundproofed room as Hugo stepped out. He patted Isagi's shoulder as they crossed paths. "The mic is hot, Yoichi. Give it some flavor."
Isagi stepped up to the microphone, adjusting the stand down slightly to match his height. He slipped the heavy studio headphones over his ears. Through the double-paned glass, he could see Sae sitting at the board, his face expressionless.
To his left, Michael Kaiser was leaning back in a rolling chair, his boots propped up on an empty equipment rack. His sharp eyes were fixed entirely on Isagi through the glass, his chin resting in his hand. He was watching Isagi like a scientist observing an anomaly in a lab.
"We're running the pre-chorus harmony layer," Sae said through Isagi's headphones. "I don't want any airiness. Give me clean, solid notes that sit exactly underneath Vivian's melody… three, two, one, tracking."
The instrumental track began playing in Isagi's ears.
He closed his eyes for a fraction of a second, letting the rhythm settle into his bones. When the cue hit, he opened his eyes, looking directly through the glass at Sae and Kaiser.
"Beneath the fractured light, we wait..."
His voice filled the studio.
It was crisp, incredibly stable, and carried a subtle, emotional undertone that gave the synthetic pop track a sudden, haunting depth. Because he understood the structure of the song from his past life, he knew exactly when to soften his vowels so that Vivian’s main vocal track would have room to breathe, and exactly when to sharpen his consonants to match Bunny's percussive rap delivery.
Inside the mixing room, Sae’s hand remained frozen over the audio sliders. He didn't need to adjust anything. The levels were entering the software perfectly balanced, the pitch perfectly centered on the digital tuner.
Kaiser slowly lowered his feet from the equipment rack. His posture straightened, his eyes narrowing as he listened to the clean, resonant harmony filtering through the high-end studio monitors.
The casual, lazy amusement on his face completely vanished, replaced by an intense, burning focus.
When the track faded out, Sae pressed the talkback button.
"Perfect," Sae said simply. It was a word he almost never used for a trainee's first take. "We're saving this cut. You're done for the day, Isagi."
"Thank you for your hard work," Isagi said, taking off the headphones and hanging them up neatly.
As he walked out of the vocal booth and back into the main studio, the atmosphere felt entirely different.
He was no longer the weak link or the quiet trainee filling a space.
He was a force to be reckoned with—an overpowered variable in a project full of geniuses.
Isagi looked at his hands, a small, determined smile finally touching his lips. His second life had just begun, and he was going to take everything