Hospitals were always too bright.

  It was a cruel, sterile paradox. In a place where human beings physically and emotionally collapsed, the ceilings were inexplicably white, and the fluorescent lights glared with an unnatural, unforgiving intensity. Even in the exact moments when someone’s entire universe was violently fracturing, the intercom system droned on in a perfectly measured, indifferent tone, and the rubber wheels of gurneys squeaked against the linoleum with agonizing familiarity.

  Jin-woo despised that blinding brightness.

  He hated it because light exposes everything. It strips away the shadows where a person can hide the micro-tremors in their hands, the subtle tightening of their jaw, and the devastating cracks forming in their eyes.

  The second he burst through the sliding glass doors into the main lobby, he inhaled a sharp, ragged breath. Seawater dripped relentlessly from his soaked clothes, pooling on the immaculate floor. His dark hair was plastered to his forehead, dripping freezing water into his eyes. A security guard near the entrance flinched, instinctively taking a half-step forward, but Jin-woo ignored him entirely. He was already at the reception desk.

  “Choi Seo-hyun... where is she.”

  His voice was terrifyingly low. It was the absolute lack of volume that made it so dangerous.

  The triage nurse blinked, momentarily taken aback by his drenched appearance and the glacial intensity radiating from him.

  “Are you... the patient’s guardian?”

  Guardian.

  The word struck Jin-woo squarely in the chest, momentarily choking him.

  It wasn't just a noun; it was a societal tether. A word that defined a person's rightful place in the world. Family. A lover. A blood relative. At the very least, it was a legally recognized proof that boldly stated, “You have the absolute right to stand by this person’s side.”

  Jin-woo possessed no such proof. He had no legal right, no blood tie, no sanctioned authority to be there.

  And yet—he opened his mouth.

  “...I’m with her care coordination side. I’m her guardian.”

  It was a lie. But simultaneously, it was a lie that Jin-woo felt a sudden, ferocious desire to protect.

  The nurse hesitated, her eyes flickering over his soaked clothes, but before she could question him further, she looked past his shoulder. Someone was sprinting down the long corridor toward them.

  “Manager!”

  It was Han So-hee.

  She skidded to a halt, her chest heaving as she took in Jin-woo’s appearance. The soaked clothes. The dripping hair. And the look in his eyes—a dark, fathomless intensity that absolutely did not belong to the clumsy, good-natured “Manager Kang.”

  So-hee understood the gravity of the situation in a fraction of a second. And because she understood, she moved with flawless efficiency.

  “He’s with me,” she told the nurse quickly, flashing her ID and lowering her voice into crisp administrative cadence. “Patient-side coordination support. I’ll handle the verification.”

  Then she turned immediately.

  “Here. She’s this way.”

  So-hee grabbed Jin-woo’s damp sleeve and pulled him away from the desk. Jin-woo did not resist. He didn’t have the strength to resist. Or rather, there was no need to.

  As they hurried down the hallway, So-hee spoke in a rapid, hushed whisper.

  “Min-su contacted me... so I rushed over first to handle the admin side. Seo-hyun is out of immediate emergency triage. Right now... she’s undergoing intensive scans.”

  “Why did she collapse.” Jin-woo demanded, his voice tight.

  So-hee bit her lip, her professional composure cracking slightly.

  “Strictly speaking... it’s cardiac distress. According to her official medical records, she was classified as a ‘complete cure.’ But the doctors are treating this like a sudden, aggressive relapse...”

  Like a relapse. The words ricocheted violently inside Jin-woo’s skull.

  Yuri. Heart. Transplant. Vessel. Control Mechanism.

  All of those clinical, horrifying concepts suddenly resurrected themselves, breathing and writhing under the harsh white lights of the hospital corridor.

  Jin-woo let go of So-hee’s arm and practically collapsed into a plastic chair outside the examination room. It felt less like sitting and more like his body had simply run out of the structural integrity required to stand.

  So-hee stood quietly beside him, a silent sentinel.

  “Manager... no...”

  Jin-woo did not turn his head. So-hee instantly recognized the rigid posture as a silent plea: Please, do not make me speak right now.

  At that moment, the squeak of rubber wheels echoed from the far end of the hall. A hospital bed rolled past them. From beneath the edge of the privacy curtain, a single, pale hand slipped out and hung limply over the rail.

  The hand was so incredibly thin.

  Jin-woo’s heart violently seized.

  That hand...

  He squeezed his eyes shut, but the darkness offered no refuge. The memory invaded his mind without his permission.

  He saw Yuri, lying on a very similar bed, right before they wheeled her into surgery. She had smiled, reaching out a thin, fragile hand to squeeze his. “I’m not scared. Because you’re here, Oppa.”

  Only now, years later, sitting in this blindingly white hallway, did Jin-woo finally realize how unbelievably cruel that statement truly was. The phrase “Because you’re here” always carried a terrifying, unspoken shadow: Which means I will be lost if you disappear.

  When Jin-woo opened his eyes, Ha-jun was sprinting down the corridor, practically tripping over his own feet. Min-su was right behind him, his stride long and deceptively casual.

  The moment Ha-jun saw Jin-woo, his eyes bulged.

  “Hyung! What the hell happened to your clothes?! Did you fall into the ocean?!”

  Min-su let out a long, heavy sigh. “Seriously, man... you just refuse to stop living in an action movie, do you?”

  Jin-woo didn’t answer. Min-su looked closely at Jin-woo’s face and immediately dropped the sarcastic facade.

  “Seo-hyun... she’s in the middle of scans right now,” Min-su reported, his voice dropping to a serious, tactical register. “And... Nari is on her way, too.”

  Nari. Hwang Seo-hee.

  The moment that name dropped, Jin-woo lifted his head. The dead, exhausted look vanished, replaced instantly by the razor-sharp focus of the Phantom.

  “I told her not to come.”

  Min-su offered a bitter, humorless smirk. “Since when does telling that woman ‘don’t come’ ever actually work?”

  Min-su was right. Seo-hee was a woman who had been told “don’t come” a thousand times in her life, and yet she always showed up. The day her family died, the day the company collapsed, the days she was left entirely alone in the dark—she always walked straight into the center of the pain. It was as if she believed that showing up was her penance.

  Jin-woo pushed himself out of the plastic chair.

  “Ha-jun. Verify it.”

  Ha-jun blinked, startled by the sudden command. “Verify what?”

  “Seo-hyun’s medical records. Stick strictly to what we can access legally. So-hee, you guide his access routes so we don’t trigger any alarms. And... contact Nari.”

  Jin-woo’s voice hardened into steel.

  “Tell her Seo-hyun is not a ‘vessel.’ She is a human being. And tell her I am going to protect her.”

  Min-su caught the microscopic tremor of raw, unfiltered sincerity beneath the cold authority of Jin-woo’s orders. Min-su knew exactly what that sincerity meant.

  Jin-woo had failed to protect Yuri. But he was utterly, violently determined to protect Seo-hyun.

  It might have been born of a crushing survivor’s guilt. Or, perhaps, it was the first genuine sign of Kang Jin-woo’s buried humanity finally clawing its way back to the surface.

  Min-su stared quietly at his friend.

  “Hey...” Min-su said, his voice unusually low. “Do you... do you actually have feelings for Seo-hyun?”

  Jin-woo’s jaw locked. He should have denied it immediately. He should have said “No” without a second of hesitation. That would have been the safest, most logical answer.

  But his lips refused to part.

  Feelings. That word felt too fast, too incredibly light for the crushing gravity in his chest. His emotions were not light.

  Finally, he spoke.

  “...It’s not that I have feelings for her.”

  Jin-woo’s voice was barely a whisper, yet it echoed loudly in the space between them.

  “It’s just... I refuse to lose someone again.”

  That answer was infinitely more dangerous. It was a sentiment far deeper than mere affection. It was the kind of desperate, anchor-like emotion that gave a dead man a reason to keep breathing.

  So-hee quietly lowered her head, respecting the weight of the confession. Ha-jun bit his lip, his eyes glistening. Min-su let out a long, slow exhale.

  “Alright, fine,” Min-su said, clapping a hand firmly on Jin-woo’s damp shoulder. “Then protect her properly. And this time... don’t try to do it alone.”

  Jin-woo gave a single, firm nod.

  At that moment, the sharp click of heels echoed from the far end of the corridor.

  Click— Click—

  It was Seo-hee.

  She had a black baseball cap pulled low over her eyes and a mask covering half her face. But there was no hiding the look in her eyes. It was the same look she always carried. A look that said, The world is not on my side. Therefore, I will strike first.

  Seo-hee stopped dead in her tracks the second she saw Jin-woo. Jin-woo did the same.

  For a fraction of a second, a silent, weary acknowledgment passed between them. A look that effectively said, It’s been a while. But the fragile greeting crumbled instantly under the weight of the reality they were standing in.

  Seo-hee spoke first, her voice muffled but sharp.

  “Choi Seo-hyun?”

  “She collapsed,” Jin-woo replied flatly.

  Seo-hee’s pupils trembled slightly. It wasn’t a tremor of worry; it was a tremor of dark, vindicated certainty.

  “I knew it,” Seo-hee hissed. “Those bastards... they’re going to control that—”

  The temperature in Jin-woo’s eyes plummeted to absolute zero.

  “Don’t call her a vessel.”

  Seo-hee let out a short, cynical laugh. “That heart is why she’s a target.”

  “Even so,” Jin-woo said, stepping closer, voice low and final, “she is a person.”

  Seo-hee lost her words for a moment. It wasn’t because Jin-woo’s logic was flawed—it was because hearing him speak like that felt incredibly foreign.

  The Phantom never spoke of humanity. The Phantom spoke of results.

  And yet, the man standing before her was drawing a line with his bare hands.

  A beat late, Seo-hee gave a slow nod.

  “Fine,” she said softly. “Then protect her as a person. But I need to verify one thing.”

  Seo-hee reached into her pocket and pulled out a small, encrypted USB drive. In her hand, it looked less like a storage device and more like a scalpel.

  “Seo-hyun’s medical records... specifically, her post-transplant care routine. There is a high probability that S-2 embedded an automated ‘signature key’ directly into her treatment schedule.”

  The narrative has been stolen; if detected on Amazon, report the infringement.

  Ha-jun swallowed hard. “Inside the hospital’s network?”

  Seo-hee nodded. “If S-2 launched a direct cyber-attack on a hospital, it would trigger massive alarms. But... a management device is completely different. S-2 used the heart to control the human. And that control isn’t maintained by malware—it’s maintained by a medical protocol.”

  Jin-woo stared at the USB in Seo-hee’s hand.

  “No illegal hacks,” he stated quietly.

  Seo-hee’s eyes flared defensively. “Then how do you expect to catch it using only legal methods?”

  Jin-woo didn’t hesitate. “We can catch it.”

  He turned to his team.

  “So-hee. Utilize every administrative contact you have in the hospital network. Push official data requests to the absolute maximum legal limit.”

  So-hee nodded instantly. “Yes. I will move as aggressively and cleanly as possible.”

  “Se-na.”

  Se-na, who had been standing quietly in the back, jumped slightly. “Yes?”

  “The dates where the records go completely blank. Cross-reference them to see if they perfectly overlap with today—the exact day she collapsed.”

  Se-na gripped her pencil tightly, her knuckles white. “...Yes. I’ll map the overlap immediately.”

  Seo-hee watched the scene unfold with a microscopic shift in her expression. The word Team had always been an alien concept to her. But right now, right in front of her eyes, a team was moving as a single, lethal organism.

  Jin-woo looked at Min-su last. “Min-su.”

  Min-su smirked, pulling his car keys from his pocket and tossing them lightly in the air.

  “Yeah, I know. Physical perimeter. I’ll sweep the area around the hospital for any suspicious stragglers. The physical world isn’t exactly your preferred battlefield, right?”

  Jin-woo nodded his thanks.

  Just then, the heavy door to the examination wing swung open.

  A doctor walked out. His expression was grim.

  Jin-woo reacted purely on instinct, closing the distance in three strides. “Choi Seo-hyun... what’s her status.”

  The doctor briefly scanned Jin-woo’s disheveled appearance before speaking in a measured, clinical tone.

  “The patient is...” The doctor paused, carefully choosing his words. “She is experiencing severe anomalous cardiac distress. And... strangely enough, while her official records indicate she was given a ‘complete cure’ clearance, her actual physical state... shows signs that a crucial, ongoing medical management protocol was abruptly terminated.”

  Jin-woo’s eyes froze over.

  Management.

  Terminated.

  Signs.

  Seo-hee had been absolutely right.

  Even though the Second Son had been arrested and locked away, the automated hand S-2 had left behind was still actively strangling its victims from the shadows.

  “Is she in critical danger right now?” Jin-woo demanded.

  “She is in a precarious state,” the doctor answered honestly. “However... if we can restabilize the management routine, there is a strong possibility she will recover. The real mystery here is why that crucial management was abruptly severed in the first place.”

  Jin-woo bit down hard on his lower lip, tasting copper.

  Through the crack in the heavy door, a faint, fragile voice echoed from inside the recovery room.

  “...That man...”

  Jin-woo stopped breathing.

  “Where is... that man...”

  Jin-woo hesitated, his hand hovering over the door handle. He wasn’t a guardian. He had no real right to cross that threshold.

  But he had already told the lie to the world. I am her guardian.

  Jin-woo pushed the door open and stepped inside.

  Seo-hyun was lying on the stark white hospital bed. Her face was terrifyingly pale, completely drained of color. But her eyes, though exhausted, were piercingly clear.

  The moment she saw Jin-woo, her eyes widened.

  “You...”

  Seo-hyun breathed, her voice trembling.

  “You’re late... again...”

  Before she could even finish the sentence, Jin-woo spoke.

  “I’m not late.”

  His voice was incredibly low, yet strangely, solidly anchored.

  “I am not late this time.”

  Seo-hyun’s pupils wavered. With immense effort, she lifted her trembling hand and weakly grasped the damp fabric of Jin-woo’s sleeve. Her fingertips were like ice.

  “I’m...”

  Seo-hyun gasped, fighting through the pain.

  “I’m scared.”

  Those two words physically tore at Jin-woo’s chest. It was the exact sentence Yuri had never been able to say aloud. It was the fear Yuri had swallowed whole to protect him.

  Jin-woo slowly, gently covered Seo-hyun’s freezing hand with his own.

  “I know it’s scary.”

  Jin-woo said softly.

  “But... I won’t leave you alone.”

  Seo-hyun’s eyes widened in genuine shock.

  “Why...” her voice cracked, thick with unshed tears. “Why are you going this far for me? You and I... we have no relationship whatsoever.”

  Jin-woo paused.

  No relationship whatsoever.

  She was right. On paper, they were absolutely nothing to each other.

  And yet...

  Jin-woo looked directly into Seo-hyun’s frightened eyes and spoke the absolute truth.

  “It’s not that we have no relationship...”

  Jin-woo whispered.

  “We have a very strange relationship.”

  Seo-hyun let out a breathy, bewildered laugh, which immediately dissolved into a harsh cough. Jin-woo hurriedly reached for the water cup on the bedside table, but Seo-hyun raised her hand to stop him.

  “This strange relationship...”

  Seo-hyun managed to say. “Did it start... because of the ocean?”

  Jin-woo nodded slowly.

  “The ocean... just keeps violently tying us together.”

  Seo-hyun closed her eyes for a long moment, leaning her head back against the pillow.

  “...My heart,” she whispered into the sterile air. “My heart... just kept dragging me back to that cliff. It feels so... so bizarre.”

  Jin-woo let out a quiet exhale.

  “It’s not bizarre.”

  He replied. “Hearts... are bizarre things to begin with.”

  Seo-hyun opened her eyes and looked at him.

  “Does a heart...” she asked cautiously, afraid of the answer, “Does it remember people?”

  Jin-woo’s face stiffened for a fraction of a second. That was the one question he had desperately wanted to avoid for the rest of his life.

  But Seo-hyun was already knocking on that terrifying door.

  Jin-woo finally relented.

  “...There are times when it certainly seems like it remembers.”

  Seo-hyun read the subtle, agonizing shift in his expression. And within that look, she recognized a canyon of grief far deeper than anything she could comprehend.

  “Then...”

  Seo-hyun whispered softly.

  “Is the person you lost... the one who kept calling me to that cliff?”

  Jin-woo could not answer. To say yes felt like killing Yuri’s memory, reducing her to a ghost haunting a transplant. And to say yes simultaneously felt like erasing Seo-hyun’s own identity, reducing her to a mere echo.

  Instead of answering, Jin-woo squeezed Seo-hyun’s hand tighter.

  “No matter who the heart is calling out to,” Jin-woo stated with absolute conviction. “Right now... you are the one who has to live.”

  Tears pooled in Seo-hyun’s eyes, and seeing them only made the ache in Jin-woo’s chest worse.

  “You have to survive...” Jin-woo said slowly, his voice dropping into a dark, determined register. “So that I can finally put an end to this insane crusade.”

  Seo-hyun blinked in confusion. “Insane crusade?”

  Jin-woo let out a short, self-deprecating laugh.

  “Yes.” He smiled faintly. “I have a bit of a habit of doing crazy things.”

  Seo-hyun tried to laugh, but the tears finally spilled over, trailing down her pale cheeks.

  Just then, the heavy door to the hospital room cracked open. Min-su simply poked his head in, offering a silent nod. Just outside the frame, Seo-hee stood guard near the corridor corner while Ha-jun and So-hee worked the admin terminals farther down the hall, keeping distance from the room. Se-na was in a side waiting area, already comparing dates with her pencil, hands trembling with purpose.

  Watching that scene unfold through the crack in the door, Jin-woo let out a very low, relieved breath.

  He wasn’t alone.

  This time—he was absolutely not alone.

  Jin-woo looked back down at Seo-hyun. “Promise me one thing.”

  Seo-hyun caught her breath and asked softly, “...What is it.”

  “Don’t ever go to the ocean by yourself again.”

  Seo-hyun let out an incredulous, breathy laugh. “You’re asking me that... right now?”

  Jin-woo’s eyes were deadly serious. “Yes. Right now.”

  Seo-hyun hesitated for a moment, studying the intensity in his gaze, before giving a small, fragile nod. “...Alright. I promise.”

  Hearing that answer, an inexplicable, profound sense of relief washed over Jin-woo. That small, fragile promise wouldn’t magically fix the broken world, but it was enough to give him the strength to endure tonight.

  Without letting go of her hand, Jin-woo added, “And one more thing.”

  Seo-hyun blinked up at him.

  “This time...” Jin-woo swore, his voice a bedrock of certainty. “I will not be late.”

  Hearing that, Seo-hyun finally smiled. It wasn’t the broken, defensive smile from the cliff. It was incredibly weak, but it was real. A smile that belonged to the living.

  Looking at that smile, Jin-woo made a silent, unshakeable vow within his own soul.

  Not for Yuri.

  For Seo-hyun.

  Not as Phantom.

  But as Kang Jin-woo.

  Suddenly, Seo-hee’s voice cut through the quiet hum of the hallway. It was low, sharp, and cold as ice.

  “Jin-woo.”

  Jin-woo turned his head. Seo-hee’s eyes were as devoid of warmth as a ghost’s, but beneath the ice, there was a heavy layer of exhaustion.

  “I found it.”

  Seo-hee stated.

  “The termination of her medical management... it wasn’t a coincidence, and it wasn’t an organic failure. Someone manually cut the line.”

  Jin-woo’s eyes darkened into a glacial stare. “Who.”

  Seo-hee offered a brief, cynical smile.

  “I don’t have the identity yet,” she said. “But one thing is absolutely certain. Even though S-2 is locked in a cage... the Automated Guillotine he installed in the system is still fully operational.”

  Jin-woo instinctively tightened his grip on Seo-hyun’s hand.

  Through the pressure of his grip, Seo-hyun instantly felt the shift in his demeanor. She realized he was about to step back into the war zone.

  “Are you...” Seo-hyun asked, her voice tight with worry. “Are you going off to fight again?”

  Jin-woo paused.

  He looked down at Seo-hyun, his expression softening just a fraction.

  “I’m not going off to fight...”

  His voice dropped to a gentle, reassuring whisper.

  “I’m going off to save someone.”

  Seo-hyun’s eyes wavered. She stared at him for a long time before offering a very small, hesitant nod.

  “Then...” she whispered. “Save them... and come back.”

  When he heard those words, it hit Jin-woo like a physical blow. For the first time in years, he fully realized what he had just been given.

  He had just been given a place to return to.

  He knew exactly how terrifyingly fragile that gift was. And he knew exactly how much of a miracle it was to possess it.

  Jin-woo gently reached out and brushed a damp strand of hair away from Seo-hyun’s forehead.

  “I will come back.”

  With that final promise, Jin-woo released her hand and walked out of the hospital room.

  The corridor was still blindingly white, and the fluorescent lights were still aggressively bright. But as Jin-woo stepped into the hall, he realized he didn’t hate the brightness quite as much anymore.

  It was okay for the lights to be bright.

  Because this time, he wasn’t trying to hide his sins in the shadows. He had something entirely new to protect in the light.

  The exact moment the heavy door clicked shut behind him, the burner phone in his pocket vibrated. It was an unknown number.

  Jin-woo pulled it out and looked at the glowing screen.

  It was a single, chilling text message.

  [ Phantom. ]

  [ The heart... is both your greatest weakness, and your only key. ]

  Jin-woo’s eyes turned pitch black.

  You thought it was over, didn’t you? The message seemed to be mocking him from the digital abyss.

  Jin-woo calmly slipped the phone back into his pocket. He lifted his head.

  Min-su, Ha-jun, Seo-hee, Se-na, Hyun-ah, and So-hee. All six of them were already in motion across the corridor and adjacent stations, each holding their lane and waiting for his command.

  Jin-woo spoke, his voice echoing with absolute, terrifying authority.

  “Let’s go.”

  With those two words, the seven members moved as one.

  They advanced through the blinding white hallway, prepared to shatter the final, invisible hand left behind by the True Master.

  And simultaneously, prepared to ensure that a single, fragile human heart would never collapse again.

  As they moved, Jin-woo repeated the mantra in his mind one last time.

  Don’t be late.

  This time...

  Never again.