Disclaimer: I do not own Naruto.
"N-Naruto-kun!"
"Hinata!" Naruto's voice echoed off the damp stone walls as he charged deeper into the cavern, the sharp urgency in his tone underscored by the flickering red glow of the Kyuubi's chakra cloaking his body.
He was a blur of rage and desperation, his heart pounding as Hinata's voice rang out—shaken, pained, and terrified. Sai kept pace beside him, silent but alert, scanning every shadow for signs of danger.
Naruto's fists clenched. Whoever had dared to lay a hand on his wife was going to regret it. The mere thought of Hinata in pain made something primal stir inside him—protective, vengeful, and unrelenting.
The cave twisted and narrowed before opening into a hollowed-out chamber. Naruto skidded to a halt as the sight before him stole the breath from his lungs.
Hinata.
She was bound to a wooden chair in the center of the room, chakra seals glowing faintly around her. Her lavender eyes had been slashed, blood seeping down her cheeks like crimson tears. Her clothes were torn, her body bruised. And yet—despite everything—she lifted her head as he approached, her voice a whisper of relief.
"N-Naruto-kun…"
He was at her side in a second, ripping through the bindings with trembling hands. As soon as they were gone, she collapsed into him, her limbs weak and trembling. He caught her easily, pulling her into the safety of his arms as rage and sorrow warred within him.
"Oi," Naruto choked out, brushing a blood-matted strand of hair from her face. "Hinata... I'm here. I've got you."
Sai remained near the entrance, tense and watchful, his eyes flicking between shadows. "I don't sense anyone nearby. Could be an ambush waiting to spring."
Hinata groaned, her fingers clutching weakly at Naruto's cloak. "It's a trap… all of this…"
Naruto's brows furrowed. "A trap?"
She shook her head slowly, her voice hoarse but urgent.
"A trap... for Sakura."
"They just keep coming," Karin growled through clenched teeth, slamming her fist into the face of another cursed seal ninja. "Sasuke, we need to do something—fast!"
"Already on it," Sasuke muttered, his Rinnegan flaring to life with a pulse of ominous power.
In an instant, he vanished.
Karin barely had time to catch her breath before she spotted him—reappearing behind enemy lines in a flash of chakra and fury. The cursed seal army didn't stand a chance. Sasuke moved like a shadow in a storm, slicing through their ranks with deadly precision. Blade flashing, lightning crackling at his fingertips, he cut down enemy after enemy with brutal efficiency.
"Damn it, Sasuke!" Karin shouted, panic creeping into her voice. "I can't hold them off much longer!"
A guttural snarl tore from Sasuke's throat. "Chidori!"
He surged forward, a streak of lightning and rage, tearing a path straight through the enemy. Blood sprayed in his wake and the sound of thunder echoed through the caves. Still, they kept coming—more and more of them, like a wave that refused to break.
"Sasuke!" Karin's scream rang out, fear and frustration mingling in her voice.
Another flash of the Rinnegan—and Sasuke was beside her again.
Three cursed seal shinobi had cornered her. He yanked them off with raw force, sending one crashing into a boulder with a sickening thud. With a sharp pivot, Sasuke stepped in front of her, standing between her and the encroaching swarm.
"I need you to go," he said coldly, his voice low and sharp like the edge of his blade. "You're only a liability here. Go. Find Naruto. He can protect you."
Karin flinched. "But Sasuke—!"
"Go!" he roared, eyes blazing with fury and desperation.
He turned without another word, sprinting headlong into the chaos, sword raised, lightning dancing at his heels. And Karin, heart pounding and fists trembling, obeyed.
She ran—not because she was afraid, but because she knew he was right.
And because she knew Uchiha Sasuke would take care of things.
"You're seriously pissing me off," Suigetsu snarled, teeth bared as he clashed with Oboro in the dimly lit cave.
Before he could make contact, Oboro dissolved into a puddle of water, slipping between the cracks in the rock like a phantom.
"Tch," Suigetsu clicked his tongue in irritation. Without missing a beat, he vaulted up the cave wall, chakra gripping the stone beneath his feet. He twisted midair, coming down from behind with his sword already swinging.
This time, he sliced clean through Oboro's reformed body—but again, the enemy melted into water before hitting the ground.
"Real original," Suigetsu muttered, his voice dripping with sarcasm. His grip tightened on the hilt of his blade, muscles coiled with anticipation.
Across the cave floor, Mubi and Kagari lay in crumpled heaps, barely conscious. Blood pooled beneath them, and their pained groans echoed faintly. Suigetsu had already taken them out—quickly, efficiently. And yet, Oboro still stood.
Battered but burning with resolve, Oboro's chakra flared faintly as he reformed once more, expression dark with fury.
Suigetsu's violet eyes gleamed with amusement and annoyance. "I've already carved through your friends. You really think you've got a chance?"
Oboro didn't respond. He simply raised his kunai, body trembling with a mix of exhaustion and sheer willpower.
Suigetsu smirked, his sword resting on his shoulder. "Guess we're doing this the hard way."
Suigetsu didn't wait for a reply.
With a flick of his wrist, he surged forward—faster than Oboro could react, blade cutting through the air with a shriek of steel. But again, Oboro's form shimmered and scattered into mist, his water release technique delaying the inevitable.
"Tch, you're like a cockroach," Suigetsu muttered, skidding to a halt and scanning the shadows. "Slippery, but not invincible."
A kunai came whistling from above. Suigetsu dodged to the side, letting it embed itself into the stone wall behind him. The moment his foot touched the ground, the puddle beneath him shifted—Oboro striking up from below like a viper.
Suigetsu barely had time to react. Oboro's kunai slashed across his side, drawing blood.
"Finally," Oboro rasped, voice hoarse. "You're not untouchable."
Suigetsu stared down at the cut, then back at Oboro—and laughed. "You think that's going to stop me?"
His body liquified in an instant, the wound sealing as he morphed into water and surged forward like a wave. Oboro barely brought up his arms before Suigetsu reformed behind him and smashed the hilt of his blade into his spine.
Oboro dropped to one knee with a grunt of pain.
"That's the thing about fighting me," Suigetsu said, his voice low and dangerous as he pressed his blade against the back of Oboro's neck. "You can't win a war of attrition against someone who doesn't bleed like you do."
Oboro coughed, hands twitching as he tried to form another seal.
Too late.
Suigetsu slammed him into the cave wall with bone-crushing force. The impact echoed like thunder, and Oboro slumped, finally unconscious—or close enough.
Suigetsu stood over him, panting slightly, eyes scanning the cavern. Mubi and Kagari were still breathing, though barely.
He sheathed his blade with a satisfied huff. "And stay down."
Just as he turned to leave, a distant rumble shook the walls of the cave. Dust fell from above, and Suigetsu narrowed his eyes.
"That better not be more of you bastards," he muttered.
Then, faintly—the light of the chidori. A signature he recognized.
"...Sasuke?"
He smirked and started walking toward the source of the flare.
"Guess the party's just getting started."
"Jūgo has unpredictable bursts of rage," Kabuto said, his voice measured, almost clinical. "Sakura-sama developed a stabilizing medication to suppress those violent episodes. As long as he's been taking it regularly—and I've personally ensured he has—there haven't been any flare-ups."
He tapped two photographs laid out on the table—one of Kiba, the other of Shino, both injured and unconscious. His brow furrowed.
"But this…" Kabuto said, fingers tightening slightly on the glossy edges. "This kind of damage—it's Jūgo's work. No one else hits with that combination of brute force and primal chakra."
He then picked up another image—a close-up of the cursed seal branded into the neck of one of the attackers.
"And this," Kabuto continued, holding the image between his gloved fingers, "isn't Orochimaru's seal. This design is… familiar, but twisted. If this is what the cursed seal nin were marked with when they dumped Kiba and Shino at Konoha's front gate, then I suspect you're dealing with someone I haven't seen in a very long time."
Kakashi and Shikamaru exchanged a sharp glance.
"Who?" Kakashi asked.
Kabuto hesitated, eyes narrowing as old memories surfaced.
"There was another of Orochimaru's students," he said slowly. "One who defected not long before Orochimaru's fall. He had an unhealthy obsession with the cursed seal experiments—especially Jūgo."
"What did he want with Jūgo?" Shikamaru asked, frowning.
"Jūgo's DNA," Kabuto replied. "He believed it was the key to perfecting the curse mark—adapting it, evolving it. He infused his own chakra with Jūgo's genetic material and created his own brand of cursed seal. But he added a dangerous twist."
Kakashi leaned forward. "What kind of twist?"
Kabuto met their gazes. "He tampered with medications—modified the compounds meant to heal and stabilize. In doing so, he discovered a way to turn drugs into a control agent. His seals didn't just empower—they enslaved. His test subjects weren't just warriors. They were puppets."
Shikamaru's jaw tightened. "And you think he's behind this?"
"If Jūgo has suddenly gone rogue, despite his medication…" Kabuto's tone darkened. "Then yes. That boy was always determined to weaponize Jūgo's condition. He saw him not as a person, but as a prototype."
"And who is this twisted mastermind?" Kakashi asked.
Shikamaru's eyes narrowed. "Give us a name, Kabuto."
Kabuto looked from one to the other, then finally said, with a hint of regret, "Dorobō Haruhi."
Sakura had never experienced a headache like this in her life. It throbbed behind her eyes with a dull, relentless ache, and a high-pitched ringing buzzed in her ears, drowning out her thoughts. As she blinked slowly, the world around her swam into focus—dim lantern light flickered overhead, casting shadows on damp stone walls.
She flinched when she realized she wasn't alone.
"J-Jūgo…" Sakura rasped, her voice hoarse as she reached out instinctively toward her comrade. "Wh-What happened?"
But Jūgo didn't move. He stood still—unnaturally still—his eyes fixed on her with a vacant, glassy expression. The light in them was gone. Not blank, but… hollow. Puppet-like.
Sakura's stomach turned.
Her gaze shifted to the figure beside him, a man whose presence she hadn't immediately registered. He stepped closer, the flickering lantern catching the gleam of his vibrant red hair.
"H-Haruhi?" Sakura blinked, trying to make sense of it. "What are you doing here?"
Haruhi gave a cheerful smile, crouching beside her as though they were simply catching up over lunch.
"Yes, Sakura-sama," he said brightly. "I was beginning to worry you wouldn't wake up."
Confusion swirled through her aching head. Haruhi had been one of the newer additions to her hospital team—eager, bright, and hardworking. He'd only been with them for a few months, but he'd already impressed several of the senior staff. Before she'd left on this mission, he'd even asked her to mentor him more closely.
None of that matched what she was seeing now.
"Why are you here?" she asked, struggling to sit up, every movement sending pain lancing through her skull. "Why… isn't Jūgo saying anything? And Haruhi, why aren't you in Konoha?"
Haruhi's grin widened, eyes gleaming with childlike excitement. "Because you're here, silly."
"What…?"
"I've been working on a little project of my own," he said, voice almost sing-song. "You know how passionate I am about pharmacology. I've been refining some formulas—your sedatives, your suppressants, chakra stabilizers… I even improved Orochimaru's cursed seals. And when I saw how effective everything was on Jūgo, well—how could I not show you?"
Sakura's blood ran cold. Her gaze flicked back to Jūgo. The sluggish chakra signature. The dulled eyes. The faint, corrupted shimmer of a cursed seal reawakened.
"What did you do to him?" she breathed.
"Oh, he's not in pain, if that's what you're worried about," Haruhi said, his voice gentle. "In fact, he's never been more… cooperative."
"Haruhi…" she whispered. "This isn't medicine. This is control."
He tilted his head, like a child puzzled by an obvious truth.
"I needed your insight, your brilliance. But the higher-ups? They wouldn't have understood. So I had to get creative." He leaned closer, his grin now a twisted echo of the bright smile she once knew. "I knew you'd come for Hinata. I just had to wait. And now, we can continue our research. Together."
Sakura's fingers dug into the stone beneath her, heart pounding. She wasn't just a hostage—she was part of the experiment.
And she needed to get out.