The observation lab inside Tojo Sayako Medical Research Facility glowed with a sterile calm that felt almost artificial. Soft white lights washed over rows of humming monitors, their steady rhythm blending with the faint, ever-present scent of disinfectant. Everything was clean. Too clean.

  Milena leaned over a terminal, her sharp eyes tracking streams of data as they scrolled endlessly downward. Kanzaki stood a few steps behind her, hands clasped, posture stiff, unease written plainly across his face. Michelle and Trella hovered nearby, while Maya scribbled notes by hand, the scratch of pen against paper the only sound that didn’t belong to a machine.

  Milena frowned. “Hm. That’s strange… C110 sequence has markers I’ve never seen before.”

  Maya leaned closer, squinting at the screen. “Maybe Yamada invented something new?”

  Milena let out a quiet, humorless breath—half a smirk, half a warning. “If he did, then Einstein’s back from the grave. These markers… they’re adaptive. They shift like they’re alive.”

  Trella folded her arms. “That sounds like trouble.”

  “It is trouble.” Milena tapped the screen, pulling up another panel. “Adaptive genes mean the serum can evolve on its own. It’s learning what the host body needs.”

  Milena clicks through another panel. A cluster of graphs spike.

  Milena’s voice lowered. “And look here — this isn’t cell regeneration. This is reconstruction. The serum doesn’t heal the body… It rebuilds it.”

  Michelle’s jaw tightened. “So the girl we met… might not even be fully human anymore.”

  Kanzaki stiffened instantly. “Please don’t say that. She’s a child, not a specimen!”

  Milena softened, just a bit. “I didn’t say she wasn’t human, Professor. I said she might not be entirely the same kid anymore.”

  Silence settled between them, thick and heavy, broken only by the hum of equipment.

  Trella scrolled through another file. “Wait, Yamada’s reports don’t match this data. These results were edited — time stamps, dose records, half of the logs are missing.”

  Michelle didn’t hesitate. “He’s covering something.”

  “Should we call him in?” Maya asked.

  Milena nodded once. “Yeah. I want him to explain this in person. And I want every dose record pulled.”

  Michelle nods, pulls her phone. A moment later, she lowers it. “He’s already in the building. Coming up now.”

  Trella gave a thin smile. “Perfect. I love when the guilty walk right into the room.”

  A few beats of silence again. Professor Kanzaki turned toward the window, staring through the glass as if the answers might be hiding somewhere beyond it. “I still can’t believe this… I trusted him. I thought he was building a cure for the incurable.”

  Milena’s voice was quiet, almost sympathetic. “Maybe he still thinks that. Sometimes the worst people start with the best intentions.”

  The door opens. Yamada steps in, coat slightly wrinkled, eyes ringed with fatigue. He looks at the screens, then at Milena and Michelle. “What is going on here? Why are you still in my lab?”

  Michelle turns the monitor toward him — the modified genome glowing on the display. “You tell us. And this isn′t your lab anymore.”

  ***

  White light flooded the test chamber. Machines whispered in quiet rhythm as Yuno sat on a reinforced examination chair, thin wires running from her skin into translucent monitors blooming with shifting color. Through the one-way glass, Kanzaki, Liza, and Talia watch. Each carries a tablet, expressions carefully neutral.

  “Muscle recovery’s still accelerating,” Kanzaki said. “No sign of fatigue.”

  “That’s impossible,” Liza replied. “She hasn’t slept in twenty hours.”

  Talia is checking data. “Metabolism is compensating for it. She’s running like a reactor.”

  Inside the room, Yuno lifts her arm when told, flexes. Her face is calm, obedient, but her eyes dart now and then to the mirror.

  “Do you want me to hold it longer?” she asked.

  “Five more seconds, please.”

  Yuno nods, counting silently. The muscles in her forearm tighten, veins standing out under the light.

  Liza read her vitals and frowned. “Heart rate stable. Neural conductivity—wait… Drop, then spike.”

  “Artifact?” Kanzaki asked.

  Talia shook her head slowly. “No. That's an emotional response. But to what?”

  Yuno lowers her arm. She glances at the mirrored wall again, irritation flashing briefly behind her gentle smile. They keep staring like I’m a puzzle. Like they’re afraid to touch the edges.

  “I hate this silence,” Kanzaki murmured. “It’s like she’s listening to us.”

  “She can’t hear through the glass,” Liza said, though her voice lacked conviction.

  The monitor spikes again. Yuno tilts her head slightly, as if reacting to something unheard. Her voice is polite, perfectly measured. “How much longer will these tests continue?”

  “Until the readings settle,” Kanzaki answered. “We’re verifying your recovery pattern.”

  Recovery, Yuno echoed silently, almost amused. That’s a generous word for it.

  “Professor,” Liza said, tense, “her core temperature’s dropping.”

  “She’s not cold,” Kanzaki replied. “Look at her skin—no gooseflesh, no shiver reflex.”

  The air felt heavier now. The hum of the lights slipped out of sync with the machines.

  “It’s like she’s… tuning to the equipment,” Talia whispered.

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  Yuno breathes in slow, precise rhythm. Her reflection in the mirror seems a fraction behind her movement.

  They think the serum changed me, she thought. They’re wrong. It showed me what was already there.

  She looks straight into the mirror — through it — and smiles, gentle and terrifying all at once.

  “End session,” Kanzaki said sharply. “Now.”

  Liza hesitates. “But we’re mid-sequence—”

  “Now.”

  Yuno stood, movements fluid, almost feline.. She tilts her head again, inquisitive, almost amused, as the lights flicker back to full brightness.

  “Am I done being measured?” she asked softly.

  Kanzaki doesn’t answer. The intercom cuts. The faint hum of the monitors fills the silence.

  Not yet, Doctor, she thought calmly. But soon—you will be.

  The lab felt darker now, filled with nervousness. Yamada sits at the table, hands clasped, trembling just enough to betray fear. His lab coat is wrinkled, collar damp with sweat. Across from him stand Michelle and Milena, shadows of two very different kinds of authority.

  “You were lead on the prototype trials,” Michelle said. “You know what that means. Every change in the sequence, every omitted stabilizer is your signature.”

  “I didn’t omit anything,” Yamada insisted weakly. “The stabilizers weren’t necessary in microdoses. I—I thought I’d found balance. You have no idea how many lives this could have saved.”

  “Balance?” Milena cut in. “You’ve seen what imbalance looks like, Doctor? Because I have.”

  He looks up at her and understood. It was the look of a man realizing he’s being judged, not heard. “You don’t understand… It worked,” he said desperately. “The tumors dissolved, the tissue rebuilt, the serum adapted. It learned.”

  Milena leaned in, her voice was low but slicing. “And what did it learn to do, exactly? Heal? Or replace?”

  Yamada falters. He looks toward the mirror wall. On the other side Yuno watches, her eyes following the conversation.

  “We’ve seen your data. You kept a secondary sequence hidden,” Michelle said. “‘Project Tsukiyo.” You mind telling us what it was meant to do?”

  Yamada’s voice cracks. “That wasn’t a project… it was a safeguard. A way to keep her stable—”

  Milena cuts in. “Then where is it? Where’s the formula?”

  He says nothing.

  “You deleted it,” Michelle said.

  “No.” His voice cracked. “I destroyed it. Because I realized what it was doing to her.”

  Milena freezes. That last sentence hits her harder than she expects.

  Behind the glass Yuno listened, catching fragments of voices through layers of silence and machinery. — stable… destroyed… her… Her pulse quickens. Not from fear, but from clarity.

  He ruined it, she thought. All those hours. All that pain—for nothing. He calls it healing. I call it breaking.

  She leaned closer to the glass, her reflection staring back at her with the same calm, patient eyes. Her lips barely moved as she whispered to it.

  “I want to talk to him. Just once.”

  ***

  The questioning winds down. Milena paces silently while Michelle gathers her notes. Kanzaki’s voice crackled through the comm speaker. “There’s a request from Yuno. She’s asking to see Dr. Yamada. Privately.”

  Milena frowns. “That’s not exactly standard procedure.”

  “She said she wants to thank him.”

  Michelle glances toward the observation glass, unease tightening her shoulders. “Professor, are you sure this is a good idea?”

  “If it gives us context for her attachment to him, it could help. Five minutes. I’ll monitor the vitals.”

  Milena hesitated. Then she exhaled—long and heavy. “Fine. Five minutes. Keep a team nearby.”

  Yamada looks up, confused but relieved. “She… wants to see me?”

  Michelle met his eyes, expression flat. “She’s awake, Doctor. Try to keep it that way.”

  He nods, nervous, and stands.

  Yuno sits quietly on the examination bed, cables now detached, hair falling in her face like a curtain. When Yamada steps in, she looks up slowly, smiling almost too warmly.

  “Doctor. You came.”

  The door hisses shut behind him. Outside, behind the glass, the monitors hum. Heartbeat steady, vitals clean. Kanzaki notes the data. Inside, Yuno’s hands rest politely in her lap.

  “You said once… that pain means I’m still alive.”

  Yamada’s expression faltered. “Yuno… I—”

  She rises, taking one slow step closer and smiles. “You were right. I felt so much pain.” Tears shimmered in her eyes. Beautiful, convincing, false. “It made me alive in ways you can’t imagine.”

  Her hand moved gently, brushing his arm with something that felt like forgiveness.

  Her voice dropped to a whisper. “You should have let me die, Doctor.”

  She grabbed his throat.

  On the monitors the vitals spiked. Red lines cutting across screens. Kanzaki’s eyes widened.

  “What the— open the door! NOW!”

  The sound of a crack. Yamada’s body collapsed to the floor. Yuno stands over him, breathing slowly, expression tranquil. She knelt, carefully closing his eyes with gentle fingers. “Thank you… for everything.”

  Then she looks up toward the mirrored glass, right where Michelle and Milena were rushing in, and smiles.The alarms screamed. Red lights washed the room in violent color. Yuno turned, muscles coiling, ready for the hunt.

  Red strobes flash through the lab. Yuno stands in the center of the wrecked test room breathing slowly, controlled, eyes sharp. Yamada lies motionless beside her. Michelle bursts in with Milena close behind.

  “Everyone out! Now!” Michelle screams.

  Milena grabs Kanzaki by the sleeve, dragging the stunned professor away. “You want to live, move it!”

  The second the door shuts, there’s silence, until the echo of running steps cuts through it. Aiko slides through the doorframe, stance already low and tight, no hesitation. She sees the body, sees Yuno. “You shouldn’t have done that.,” she said quietly.

  Yuno tilts her head, smiles faintly, challenge accepted. Aiko strikes first. A blur of precision kicks and punches. Yuno blocks, counters, nearly perfect, but she’s reactive, not trained. Aiko sweeps, spins mid-kick, but Yuno grabs her leg. Using the momentum, Yuno pivots a full 360, slamming Aiko into a rack of instruments. The rack collapses in a metallic roar. Aiko crumples, dazed, bloody but conscious.

  “Okay… she’s not normal,” she groans.

  Liza and Katya storm in next — in sync like seasoned operators.

  “On me!”

  “Go left!”

  They rush Yuno together. Liza’s jabs, Katya’s grabs, perfect teamwork. But Yuno moves like water through glass, slipping past their coordination, using their rhythm against them. She ducks under Katya’s swing, grabs Liza’s shoulder and slams her into Katya. Both hit the floor hard. Yuno breathes out once, almost satisfied, and runs.

  She kicks through a door, it swings wide, smashing into Samira who was just turning the corner. Samira collapses instantly — out cold, nose broken, blood on her cheek. Yuno pauses only long enough to mutter: “Sorry. Wrong place, wrong time.”

  She sprints forward as the alarms echo down the sterile halls.

  In the main hall the air here feels different. Open, full of motion and power. Two figures stand in her path — black and white silhouettes in the red light. Aya, towering, muscles coiled, black tactical outfit and that long white mohawk blazing under the strobes. Beside her, Amelie. Pale, smiling that unsettling sadistic grin like she’s enjoying this.

  “Don’t break her too much,” Aya said. “Kanzaki might want what’s left.”

  “No promises,” Amelie replied, grinning.

  Yuno’s eyes widened. Not in fear, but in realization. These two aren’t normal. Their stillness feels wrong — predatory. She lunges first, tries Aya. A feint, a kick, a strike. Aya barely moves. Her arm shoots out, steel-fast and Yuno’s wrist stops midair like she hit a wall.

  Too strong.

  Aya pushes, Yuno flies backward, hits a table, flips and lands on her feet. She barely has time to breathe before Amelie’s already moving. The goth loli blur glides in graceful, too smooth — a dancer’s murder. Yuno dodges by inches. A glass tray shatters against the wall where her head was.

  Fast. Too fast. What are they?

  Aya comes again. Amelie laughs, spinning low. They move like twin shadows, perfectly synced. Yuno can’t overpower them. She can feel it. Her only option is to think. Her eyes dart as she scans the hall. A coolant line, a gas release valve, an alarm sprinkler system. She ducks under another punch, rolls, grabs a nearby tray and throws it at the valve.

  Hiss! A burst of freezing vapor erupts, filling the hall in fog.

  “Clever girl!” Amelie laughed.

  Yuno’s outline vanishes into the mist. Aya rushes through, swinging blindly.

  “Where is she—”

  A sound — the crash of a side door answered her..

  Yuno sprints barefoot now, faster than before, breath sharp and deliberate. She turns a corner and freezes. The rest of the Fangs — Trella, Maya, Mei-Ling, Anya, Talia, all pouring into the hall ahead. They form a loose semi-circle. Exhausted, confused, tense. Trella steps forward. “Don’t make us do this.”

  Yuno’s eyes flick between them, reading each stance, calculating. Then she just smiles.

  “You couldn’t stop me even if you wanted to.”

  She steps back and runs toward the window.

  “Stop her!” Michelle shouts from the background.

  But too late. Yuno dives through the glass. A perfect roll midair, lands cat-silent on the ground below, two stories down.The others reach the window while glass is still falling. Outside, the mist and sirens blur her shape and then she’s gone. The wind carries faint alarm echoes. In the distance, through the fog and flashing lights, a small silhouette slips into the forest. She is gone.