Day 67. 09:00 hours.
Second Floor.
The Resident Wing.
Ji-yoo's Room.
The room smelled like guitar oil and old wood.
The queen bed dominated the room — black sheets, the comforter bunched at the foot where she had kicked it.
The Marshall stacks in the corner — hauled from their apartment in Shore Residences, Pasay, the same ones she had played through at every gig from Quezon Avenue to Sagada — were dark, their pilot lights off, their speaker grilles carrying the thin film of frost the climate control had not quite banished.
Three electric guitars hung on the wall above the amps: a 1987 Fender Strat in matte black, a Gibson Les Paul in cherry sunburst, and the customized Telecaster she had built herself, the body sanded to bare wood, the pickups hand-wound by a luthier in Cebu who had died in the first week of the freeze.
A Music Man StingRay bass leaned against the wall — the same model Perf de Castro had played on the Rivermaya records.
Pedals covered a small table beside the amp — distortion, delay, reverb, the vintage Boss chorus pedal their father had given her when she turned fifteen.
Rivermaya posters covered the walls — the 1994 lineup, the 1997 lineup, the 2000 reunion, each framed in cheap black metal, each signed in Ji-yoo's hand with the dates she had seen them live.
The guitar case that had once held her first acoustic sat in the corner, empty now — Soulcleaver did not need a case, had never needed a case, lived in the marrow of her soul the way a heartbeat lived in the chest, manifesting when she called and dissolving when she did not.
A Razer Blade laptop sat open on the small amp case she used as a desk, its screen glowing blue-white in the dim room, a guitar tablature program open — half-composed, the notes arranged in neat rows across the staff, a new riff she had been working on for three days and had not yet named.
A window — triple-pane leaded polycarbonate — frosted white with the minus seventy outside.
Jae-min sat on the edge of the bed with his back against the headboard.
Ji-yoo was in his lap.
Sideways.
Her legs draped over his thigh, her back against his chest, her head tucked under his chin.
She was wearing one of his brother's old tees — a Jimmy Fallon Show, where Jimmy is eating spicy chicken wings, the cotton so worn it hung almost to her thighs, the neckline stretched out and slipping off one shoulder.
Nothing else.
Her waist-length black ponytail was loose, spilling across his shoulder.
His arms were around her.
His right hand rested on her stomach, his palm flat against the fabric, his fingers spread across the slight curve of her abdomen.
His left hand was in her hair, his fingers threading slowly through the loose strands, lifting them to his face.
He breathed in.
The scent of her shampoo — the last bottle of the pre-Freeze brand she liked, rationed to two drops per wash, scheduled to run out in three weeks — and underneath it, the particular warmth of her scalp.
The scent was just Ji-yoo.
The scent he had been breathing since before he had words for scent.
"Do you think the void has a flavor?" Ji-yoo murmured, her cheek pressed against his collarbone.
"No," Jae-min answered, low, his mouth still in her hair.
"You don't know. You haven't tasted it," Ji-yoo pressed, her finger poking his knee.
"I'm not going to taste it," Jae-min answered, flat, his mouth still in her hair.
"Paolo would taste it," Ji-yoo pressed, her finger tracing idle circles on his knee. "Paolo would taste it and then write a seven-page paper on the topological flavor profile of extra-dimensional apertures."
"Paolo would," Jae-min allowed, the corner of his mouth curving against her hair.
"He'd dedicate it to Usagi," Ji-yoo countered, her grin audible in her voice.
"He'd dedicate it to Usagi," Jae-min confirmed, his mouth still in her hair.
They sat with that for a moment.
The warmth of the room — the geothermal coils pushing their steady heat through the walls — pressed against them like a second blanket.
Outside the frosted window, the world was white and dead and minus seventy.
Inside, Ji-yoo's finger traced its circles on his knee, and Jae-min's hand rose and fell with her breathing on her stomach, and the silence was the oldest in the world.
"Do you think Chocho dreams?" Ji-yoo pressed, soft, her cheek pressing harder against his collarbone.
"Yes," Jae-min answered, low, his hand tightening briefly on her stomach.
"About what?" Jae-min pressed, low, his chin settling on top of her head.
"Soldering irons. Crystal oscillators. Aiko's lap," Jae-min answered, deadpan.
"Aiko's lap is not a dream. Aiko's lap is a career." Ji-yoo's finger paused on his knee. "Do you think Chocho has opinions about the frequency-hopping codec?"
"Chocho has opinions about everything. She just doesn't share them with people who haven't earned it," Jae-min allowed, his thumb tracing a slow circle on her stomach.
"Has Mei earned it?" Ji-yoo pressed, her finger tracing idle circles on his knee.
"Mei has earned a provisional opinion-sharing status. Pending review," Jae-min measured, dry.
Ji-yoo laughed.
Small.
The sound pressed against his chest.
Her hand found his — the one on her stomach — and her fingers threaded through his, tightening, loosening, tightening in the involuntary rhythm of a twin who was holding on to something she already had.
"Oppa," Ji-yoo murmured, the word muffled against his collarbone.
"Hm," Jae-min answered, his chin settling on her head.
"Marie's arroz caldo. Scale of one to ten. Honest answer," Ji-yoo murmured, her cheek shifting against his collarbone.
"Seven," Jae-min answered, flat, his thumb tracing a slow circle on her stomach.
"Liar. It's a nine," Ji-yoo countered, her finger poking his knee.
"It's a seven with extra ginger. The extra ginger bumps it to an eight on Uncle's days," Jae-min corrected, the corner of his mouth curving against her hair.
"Uncle's days," Ji-yoo repeated, her voice warm.
"Uncle's days," Jae-min confirmed, the corner of his mouth curving against her hair.
Ji-yoo's finger stopped tracing circles on his knee.
"Oppa," Ji-yoo murmured, her cheek shifting against his collarbone.
"Hm," Jae-min answered, his chin settling on her head.
"Do you remember when we were eight," Ji-yoo murmured, her voice carrying the particular softness of a twin about to deploy a weapon, "and you told Mom that I was the one who broke the vase in the upstairs hallway."
"You were the one who broke the vase," Jae-min answered, low, his hand settling on her stomach.
"I was. But you told her anyway. That's the issue. That's the betrayal." Ji-yoo's hand found his ribs. "I never forgave you for that."
"Ji-yoo," Jae-min warned, low, his hand tightening on her stomach.
"Never," Ji-yoo repeated softly, and her fingers moved.
Jae-min flinched.
It was not a flinch of pain.
It was the involuntary recoil of a man whose ribs had just been attacked by a twin who had spent twenty-eight years memorizing every ticklish spot on his body and had, in this moment, deployed that knowledge with the precision of a surgeon and the malice of a sibling.
"Ji-yoo," Jae-min warned, his voice breaking on the second syllable.
"Never forgave you," Ji-yoo sang, her fingers dancing, her body twisting in his lap to get a better angle, the concert tee riding up her thighs as she squirmed.
Jae-min's hand left her stomach.
It found her ribs.
Ji-yoo shrieked.
The sound was loud and bright and completely untactical — the sound of a woman whose gravity-shift sense could read a heartbeat at a kilometer but could not, in this moment, defend against her brother's thumb finding the soft spot beneath her left arm.
She bucked.
He held.
She twisted.
He followed.
The queen bed creaked under the redistribution of two adults who had, in the space of three seconds, reverted to the ages of eight and eight and the particular warfare that only twins could wage.
"Stop — stop — oppa — STOP," Ji-yoo gasped, her laughter breaking the words into pieces, her fingers still clawing at his ribs in retaliation, her legs kicking at the sheets.
"Say you broke the vase," Jae-min pressed, his mouth curving into something that was not a smile because Jae-min did not smile but was, in this moment, doing a very good impression of one.
"I BROKE the vase — I broke it — I broke it — okay — OKAY —" Ji-yoo's hands found his wrists, her fingers locking around them, her chest heaving, her dark eyes bright with the particular brightness of a woman who had just lost a war and was negotiating the terms of surrender. "You win. You win. Let go."
Jae-min let go.
Ji-yoo collapsed against his chest.
Breathless.
Both of them.
The queen bed's black sheets were tangled around Ji-yoo's legs.
The comforter had been kicked to the floor.
One of the pillows had, at some point during the engagement, ended up on the other side of the room.
Ji-yoo's hair was everywhere — across his shoulder, across his chest, across his face.
Her tee had ridden up to her ribs.
Her breathing was ragged.
His breathing was ragged.
They lay there.
"I hate you," Ji-yoo murmured, her cheek pressed against his collarbone, her voice carrying no conviction whatsoever.
"I know," Jae-min answered, low, his hand settling back on her stomach, his palm flat, his fingers spread.
"You're the worst," Ji-yoo countered, her finger poking his ribs one last time.
"I know," Jae-min allowed.
"You're the worst twin in the history of twins," Ji-yoo pressed, her grin audible.
"I know," Jae-min repeated, his chin settling back on top of her head, his thumb tracing a slow circle on her stomach.
Ji-yoo's hand found his.
Her fingers threaded through his, tightening, loosening, tightening.
"Oppa," Ji-yoo murmured, her voice soft now, the laughter gone, the warmth remaining.
"Hm," Jae-min answered, his mouth in her hair.
"Thanks for being alive," Ji-yoo whispered, her fingers tightening on his.
"Thanks for being alive," Jae-min whispered back, his hand tightening briefly on her stomach.
They sat with that too.
The morning light through the frosted window was grey and thin and did not reach the bed.
The room was warm.
The twins were warm.
The world outside was not.
Jae-min's hand tightened briefly on her stomach.
Not a squeeze.
A hold.
The particular hold of a twin whose spatial awareness was always, always running — counting the heartbeats in the compound, feeling the perimeter, mapping the masses — and who was, in this one moment, holding the one mass he did not need to map because it was already in his arms.
"I should go check the workshop," Jae-min murmured, his mouth still in her hair.
"Not yet," Ji-yoo pressed, her fingers tightening on his.
"Aiko and Mei have been working since five," Jae-min measured, low, his hand stilling on her stomach.
"Not yet," Ji-yoo repeated softly.
He stayed.
Five more minutes.
The geothermal coils hummed.
The window frosted.
Ji-yoo breathed against his chest, and Jae-min breathed against her hair, and the morning held them the way the morning holds people who do not need the morning to be anything other than what it is.
Then his spatial awareness registered a change on Level 5 — a new electrical signature, a steady pulse where there had been only the intermittent hum of the soldering station — and his hand stilled on Ji-yoo's stomach.
"They finished," Jae-min measured, low.
"Already?" Ji-yoo lifted her head from his collarbone.
"The signal strength indicator just went green," Jae-min measured, low, his spatial awareness holding the new pulse on Level 5.
Ji-yoo swung her legs off his lap.
Stood.
Stretched — the tee riding up her thighs, the hem swaying against her hips — and turned to offer him her hand.
"Come on, oppa. Let's go see what your girls built," Ji-yoo announced, bright, pulling the door open.
"My girls," Jae-min echoed, flat, taking her hand and standing.
"Aiko's been working on this for two days. She hasn't slept. Mei hasn't slept. Chocho hasn't slept, and Chocho sleeps through everything." Ji-yoo pulled the door open, her ponytail swinging. "If Aiko's ears are pink when we get there, I'm going to need you to pretend you don't notice."
"Why would her ears be pink?" Jae-min pressed, his voice carrying the particular even weight of a man who knew exactly why.
"Because you exist, oppa. That's enough." Ji-yoo grinned over her shoulder, bright and merciless, and started down the hall toward the lift.
Jae-min followed.
— • • • —
Day 67. 14:22 hours.
Level 5.
The Engineering Workshop.
The workbench looked like the aftermath of a small war.
Circuit boards stripped from a dozen salvaged devices.
Copper wire spooled in neat coils.
Capacitor banks cannibalized from industrial power supplies.
The skeletal remains of three shortwave radios that had given their lives to the greater good.
Solder joints gleamed across the primary board, each one placed with the precision of a jeweler setting stones.
Aiko Tanaka sat cross-legged on the floor beside the workbench, her shoulder-length black hair swinging behind her ear as she tilted her head, her eyeglasses reflecting the blue-white glow of the magnifier ring light.
Her graphite-smudged fingers moved with a speed and surety that belied the focus in her black eyes.
Chocho was curled in her lap.
The female fox — white-furred, blue-eyed — had settled there at five that morning and had not moved since, her ears twitching at the soldering iron's hiss but her eyes staying half-closed.
Mei Lian Santos sat in her wheelchair at the adjacent station, her pigtailed crimson hair swinging against her shoulders as she leaned toward the screen.
The wheelchair — the one Aiko had rebuilt three weeks ago with new bearings and a re-machined frame that did not squeak — held her at the perfect height for the workstation.
Her thermal undershirt clung to the swell of her breasts, the curve of her hips settling into the chair's custom cushion.
"Hand me the 47k resistor," Mei pressed, her fingers moving across the keyboard in the rapid, sure cadence of a woman who had been coding since she was twelve, her eyes never leaving the screen.
Aiko reached into the component tray without breaking her own concentration on the antenna matching circuit she was calibrating.
Her fingers found the resistor by touch — color bands identified by memory: yellow, violet, orange, gold — and placed it on Mei's side of the bench.
"Higher tolerance," Mei countered, crisp.
Aiko pulled the resistor back and found a 47k with a one-percent tolerance band — thin brown stripe instead of wide gold — and placed it down again.
Mei picked it up and soldered it into the circuit in a motion so fluid it looked rehearsed.
They had been working since 05:00.
Two days since Jae-min had come to Level 5 with the laminated card Elena Vasquez had given him and a single instruction.
"Can you build me a communication link on this frequency?" Jae-min had measured low, setting the card on the workbench.
Aiko had looked at the frequency, done a mental calculation, and answered, "Give me forty-eight hours."
That had been forty-eight hours ago.
The frequency modulator was complete.
The antenna matching circuit was in final calibration.
The power amplifier — salvaged from a broadcast radio that Paolo had recovered from a demolished electronics store on Day Forty — was mounted, tested, and integrated.
What remained was the interface.
"Interface panel," Aiko announced, low, speaking aloud to organize her thoughts, her iron pausing on the board.
"Done," Mei answered, pushing a small assembly across the bench.
A compact panel with a transmit button, a volume knob, a signal strength indicator salvaged from a WiFi router, and a small LCD screen displaying the current frequency. "Plug and play. Well. Plug and solder and pray. But functionally plug and play."
Aiko examined the panel.
She turned it over in her hands, traced the wiring with her eyes.
"This ground line is running parallel to the audio signal path," Aiko measured, flat, her finger stopping on the trace.
"I know. It induces a sixty-hertz hum that makes everyone sound like they're broadcasting from inside a refrigerator." Mei's grin was unapologetic, her crimson pigtails swinging. "I'm counting on the signal-to-noise ratio of the power amplifier to bury it."
"That's not engineering. That's optimism," Aiko countered, dry.
"It's pragmatic engineering. We have limited resources and a deadline." Mei reached for the panel and began re-routing the ground line. "But fine. Since you're going to make me do it anyway."
Aiko's mouth twitched — not quite a smile, but the ghost of one.
They worked in parallel for another hour.
Aiko completed the antenna calibration while Mei re-wired the ground line and added a low-pass filter that she insisted was "absolutely critical, don't give me that look."
The antenna itself was mounted on the roof, above the Master Attic Sanctuary, above the Third Floor, bolted to the reinforced frame of the skylight housing.
A shielded cable ran through the mansion's internal conduit, down through the floors, through the steel and concrete of the subterranean levels, and terminated at the workbench on Level 5.
The antenna's elements were wrapped in electrical tape and thermal insulation against the minus seventy air outside — the same minus seventy that had been pressing against the mansion for sixty-seven days.
At 15:17, Aiko sat back from the board and looked at the completed system.
It was not beautiful.
The primary board was mounted on a salvaged aluminum plate that served as both a heat sink and a structural frame.
The power amplifier sat beside it, its fins dusted with the faint frost of the cold room.
The interface panel sat on the workbench, its wires neatly bundled and labeled with Aiko's precise handwriting.
But it was complete.
Aiko powered it on.
The signal strength indicator glowed green — a steady, confident pulse that meant the transmitter was alive and the antenna was radiating.
"Signal strength," Aiko measured, low, her eyes on the indicator.
Mei checked the oscilloscope — another salvaged device, its screen cracked but functional. "Clean. Low noise floor. The hum is gone — happy now?"
"I'm satisfied. Not happy. There's a difference," Aiko countered, flat.
"For you, there might be." Mei stretched, her shoulders popping. "I'm starving. How much longer?"
"Not much longer." Aiko turned to the interface panel. "We need to test the receive path. I'll tune to the frequency and see if we can pick up their signal."
She adjusted the frequency dial — the LCD screen displaying Elena Vasquez's frequency in crisp white numerals — and flipped the receive switch.
Static filled the small speaker mounted above the panel.
A low, persistent hiss.
The sound of an empty radio frequency waiting for someone to speak.
"Nothing yet," Mei observed, dry, leaning back in her wheelchair.
"They may not be broadcasting. We'll transmit first and request a comm check." Aiko looked toward the door. "We should tell Jae-min."
Jae-min was already there.
He stood in the doorway of the workshop, Ji-yoo behind him, his thermal suit unzipped to the chest, his hair damp from a shower.
His dark eyes moved across the system on the workbench — the board, the amplifier, the interface panel, the green pulse of the signal indicator.
Aiko's ears went pink.
She did not look at his face.
She looked at the interface panel.
Her fingers found a solder joint that did not need re-flowing and hovered over it, the iron cold in her other hand.
"Is it ready?" Jae-min pressed, low, stepping into the workshop.
"Ready for testing," Aiko answered, her voice slightly higher than usual, her eyes still on the panel.
"Transmit and receive paths are functional.
Antenna is tuned.
Power output is sufficient for line-of-sight communication at five kilometers or more, assuming clear weather and no significant RF interference.
Which, given that every electronic device in Metro Manila is either frozen, destroyed, or without power, is a reasonable assumption."
She was talking too much.
She knew she was talking too much.
Her fingers tightened on the soldering iron she did not need.
Jae-min looked at the system.
He was not an engineer.
His expertise was in flying an F-22, logistics, warehouse management, and killing things, in roughly that order.
But he understood what he was looking at.
A communications link.
A bridge across five hundred meters of frozen nothing.
"Test it," Jae-min ordered, low, his hand settling on the back of the workbench.
Aiko reached for the transmit button.
Her finger hovered over it for a moment — not doubt, but ceremony.
The acknowledgment that this small action carried weight that went beyond its mechanical simplicity.
She pressed it.
[Aiko]: "Forbes Park to Vanguard Six. This is Forbes Park requesting comm check on designated frequency. Over," Aiko broadcast, her voice steady and clear through the small microphone, her black eyes fixed on the signal indicator.
She released the button.
Static filled the speaker.
The signal strength indicator pulsed green — transmitting, transmitting, done.
The silence that followed was enormous.
Five seconds.
Ten seconds.
Fifteen seconds.
Mei's fingers drummed on the workbench, her crimson pigtails swaying with each tap.
Jae-min stood motionless, his spatial awareness extended toward the east, toward the five-hundred-meter mark where forty-three heartbeats held position in the frozen city.
Twenty seconds.
Static hissed.
The speaker crackled.
[Elena Vasquez]: "Forbes Park, this is Vanguard Six. Comm check. Over," Elena Vasquez answered, her contralto clear through the small speaker — not perfect, a faint crackle of atmospheric interference, a slight compression of the audio, but clear.
Intelligible.
Human.
The sound of another living person, five hundred meters away, speaking through a machine that two women had built from salvage.
Aiko's hands trembled.
She pressed them flat against the workbench and held them there.
Mei let out a breath she had not realized she had been holding — a sharp, explosive exhalation that fogged in the cold air and hung there like a tiny cloud.
Her face split into a grin, wide and unguarded.
The speaker crackled again.
[Elena Vasquez]: "Forbes Park, Vanguard Six. Signal is five by five. Loud and clear. Please confirm you are receiving this transmission. Over," Elena Vasquez reported, her voice carrying the measured cadence of a military officer logging a successful contact.
Jae-min stepped forward.
Aiko moved aside, gesturing to the interface panel, and Jae-min reached for the transmit button. His hand was steady.
[Jae-min]: "Vanguard Six, this is Jae-min. Forbes Park. We receive you five by five. The link is operational. Over," Jae-min broadcast, low, his voice carrying the particular weight of a man who understood that he was not just testing a radio — he was opening a door.
Static.
Then:
[Elena Vasquez]: "Forbes Park, Vanguard Six. Excellent copy. Stand by for log entry," Elena Vasquez answered, her voice warm. A pause — the scratch of a pen on paper transmitted through the open microphone. "Log entry: fourteen twenty-three hours, Day Sixty-Seven. First successful communication link between Vanguard Six forward position and Forbes Park compound. Transmitting and receiving on the designated frequency. Signal quality: five by five. No interference detected."
Another pause.
[Elena Vasquez]: "Captain. It's good to finally talk to you directly," Elena Vasquez added, her voice dropping the military cadence for just a moment.
[Jae-min]: "It's good to hear your voice, Captain," Jae-min returned, low.
[Elena Vasquez]: "The feeling is mutual. I have sitrep updates when you're ready to receive. Also, my cook wants to know if your people have any coffee. We haven't had real coffee in three weeks, and morale is —" Elena paused, and when she resumed, there was a ghost of humor in her voice. "—suboptimal. Over."
Jae-min almost smiled.
Almost.
[Jae-min]: "Hold for logistics. Over," Jae-min answered, low, the corner of his mouth twitching against the transmission.
He released the transmit button and turned to look at the two women who had made this possible.
Aiko sat cross-legged on the floor, her hands still pressed flat against the workbench, her expression controlled.
But her ears — visible beneath the pushed-up magnifying loupe — were pink.
Her black eyes were bright, focused, alive in a way that was usually reserved for the inside of a weapon's receiver.
Mei was vibrating in her wheelchair, practically bouncing, the grin still plastered across her face, her crimson pigtails swinging.
"Good work," Jae-min measured, low, his dark eyes moving from Mei to Aiko.
Two words.
Simple.
Direct.
The kind of praise that Jae-min gave was rare.
Aiko's ears went from pink to red.
She looked at the workbench.
She looked at the circuit board.
She looked at the solder joints she had placed with such care.
"The antenna matching could be tighter," Aiko murmured, her voice slightly higher than usual, her fingers finding a trace on the board that did not need tracing. "There's a point-three dB loss in the upper band that I want to address. And the power supply filtering needs a second pass to eliminate the ripple. And the ground plane —"
She was talking about impedance matching, ground planes, and dB losses.
Mei watched this with the delighted expression of someone who had just discovered a new and fascinating specimen of human behavior.
She said nothing.
But her violet-blue eyes were very bright.
"The system is functional, Jae-min," Mei supplied, mercifully, her fingers lacing over her knee. "Aiko will refine it over the next few days, but it's operational now. You can begin regular communication with Elena's unit whenever you're ready."
Jae-min nodded.
He reached out and placed his hand briefly on Aiko's shoulder — a light touch, the kind of gesture a team leader makes to acknowledge a job well done.
Aiko went rigid beneath his fingers.
"Thank you. Both of you," Jae-min measured, low, his hand lifting from her shoulder.
He turned toward the door.
Ji-yoo, who had been leaning against the doorframe watching the entire scene with the particular brightness of a twin who had been given exactly the material she had predicted, fell into step beside him as he exited.
His footsteps receded up the corridor toward the lift.
Mei waited until the footsteps had faded.
Then she turned to Aiko.
"Your ears are the color of roses," Mei observed, dry, her chin resting on her laced fingers.
"They are not," Aiko countered, touching her ear reflexively, her other hand still on the cold soldering iron.
"They are. Specifically, the kind of roses you see on romantic greeting cards. The ones with the velvet texture and the slightly embarrassing font." Mei leaned back in her wheelchair, crossing her arms, her grin widening. "He said, 'Good work.' He looked right at you when he said it. He put his hand on your shoulder."
"He puts his hand on everyone's shoulder. It's a leadership gesture. It means nothing," Aiko pressed, flat, reaching for a resistor she did not need.
"Aiko. He looked at you the way people look at sunsets," Mei countered, crisp.
"Mei. Stop," Aiko ordered, her ears going darker.
"I'm just observing. As a scientist. The data is clear: when Jae-min says 'good work' while making eye contact and initiating physical contact, the subject exhibits elevated blood flow to the facial capillaries, increased respiratory rate, and an immediate pivot to technical jargon as a defense mechanism." Mei lay out, her grin wide, her hands held up in mock innocence. "I'm not judging. I'm cataloging. For science."
Aiko stared at her soldering iron.
The tip was cold.
She had not turned it on.
She set it down with the careful precision of someone who needed her hands to do something.
"I need to optimize the ground plane," Aiko murmured, low, her eyes on the board.
"You need to optimize your face. It's still pink," Mei countered, dry.
"I'm going to tell Hua you ate the last protein bar," Aiko threatened, flatly, her ears still red.
"You wouldn't. Hua would actually kill me," Mei answered, her hands up in surrender. "Fine. Fine. I'll stop. But I want the record to show that I witnessed this moment, and when you and Jae-min eventually —"
"Mei," Aiko warned, her voice carrying the quiet intensity of a promise.
"— eventually have a professional collaboration that leads to a meaningful partnership based on mutual respect and shared goals, I will remind you of this moment," Mei finished, her voice dripping with deliberate innuendo.
Aiko did not decode it.
Aiko picked up the soldering iron, turned it on, and began re-flowing a joint that did not need re-flowing.
Mei watched her for a moment, her grin softening into something warmer.
Then she turned back to her own screen, her fingers finding the keyboard, her violet-blue eyes dropping to the code she had been writing before the test.
They worked in silence for another twenty minutes.
Aiko rebuilt the ground plane with a level of care that the project absolutely did not require.
Mei designed a signal processing module that the system did not need.
The radio hummed on the workbench, the green light pulsing steadily, connecting Forbes Park to a voice in the frozen distance.
Chocho, who had slept through the entire test, opened one blue eye, verified that the humans were still working and the work was still good, and closed it again.
— • • • —
Day 67. 15:40 hours.
Ground Floor.
The Corridor.
Ji-yoo fell into step beside Jae-min as they emerged from the lift, her dark hair swinging, her dark eyes bright with the particular brightness of a twin who had been right about something and was not going to let the universe forget it.
"Her ears were pink," Ji-yoo observed, low, her shoulder brushing his arm as they walked.
"Drop it," Jae-min ordered, flat, his stride not changing.
"Her ears were pink, and she started talking about dB losses. It was adorable. It was like watching a small engine overheat," Ji-yoo observed, low, her shoulder brushing his arm as they walked.
"Ji-yoo," Jae-min warned, low.
"I'm just observing. As a sister. The data is clear: when you say 'good work' while making eye contact, the subject exhibits —" Ji-yoo pressed, her voice dripping with the same deliberate innuendo Mei had used, her grin wide and merciless.
"Ji-yoo," Jae-min repeated, his voice carrying the particular even weight of a man who had reached the limit.
"— elevated blood flow to the facial capillaries and an immediate pivot to technical jargon as a defense mechanism," Ji-yoo finished, her voice dripping with the same deliberate innuendo Mei had used, her grin wide and merciless.
Jae-min stopped walking.
Turned.
Looked at his sister with an expression that was, for a man who had stared down Enhanced killers and fortress commanders, remarkably close to despair.
"I have a radio link to establish with a military captain, a fortress full of two hundred soldiers to monitor, and an unidentified Enhanced at Ortigas to worry about. I do not have time for Aiko's ears," Jae-min measured, even, his dark eyes on hers.
"You should make time for Aiko's ears. They're very nice ears," Ji-yoo countered, bright, ducking as Jae-min raised a hand — not to strike, never to strike, but in the universal gesture of a sibling who had reached the absolute limit. "Okay! Okay. Serious mode. I'll stop. But I want you to know that I'm available if you need a wingwoman. I have experience. I have charts. Mei has been documenting Aiko's reactions to you since Day fifty, and the data is very thorough."
"Mei has charts," Jae-min echoed, flat.
"Mei has charts," Ji-yoo confirmed, her grin spreading. "Very scientific charts. With color-coded data points. She showed me last week. Your name comes up a lot."
Jae-min closed his eyes.
Opened them.
"I don't have a love life," Jae-min delivered, flat, turning back toward the command deck corridor.
"Exactly my point," Ji-yoo called after him, her ponytail swinging as she spun toward the stairs. "I'm going to go tell Aiko she did a good job too. Apparently, that's all it takes to make her malfunction. For research purposes."
Jae-min did not turn around.
His spatial awareness tracked her heartbeat — sixty-eight, elevated but not stressed, the rhythm of someone who was thoroughly enjoying herself — as she climbed back toward Level 5.
In the workshop above, Aiko heard footsteps on the stairs and looked up from her soldering iron.
Ji-yoo appeared in the doorway, her smile warm and genuine, her dark eyes bright with something that was not mockery but a softer, more complicated emotion.
"Did you see his face when he said 'good work'?" Ji-yoo pressed, low, leaning against the doorframe, her arms crossed.
Aiko's ears went pink again.
"Ji-yoo, please," Aiko murmured, her eyes dropping to the board.
"He looked right at you," Ji-yoo countered, soft, crossing the workshop in three quick steps and dropping onto the floor beside Aiko's cross-legged position, her hand finding Aiko's arm. "I'm serious, Aiko. You did something incredible today. That radio link isn't just a machine — it's a lifeline. You connected two groups of people who were alone in the dark. That matters."
Aiko said nothing.
Her hands were still on the soldering iron, still on a joint that did not need re-flowing.
She stared at the circuit board.
She thought about Jae-min's hand on her shoulder instead.
"I know," Aiko answered quietly, her black eyes still on the board.
Ji-yoo squeezed her arm.
"I'm just saying. If you need a wingwoman, I'm available. I have a very good track record and absolutely no sense of boundaries," Ji-yoo offered, warm, her dark eyes soft.
"I'll keep that in mind," Aiko murmured, the ghost of a smile finding the corner of her mouth.
Ji-yoo beamed. Stood. Her energy restored, her mission accomplished.
"Now. Mei tells me there's a problem with the ground plane. Let me help. I know nothing about electronics, but I'm very good at holding things and saying 'that looks right' at appropriate intervals," Ji-yoo offered, bright, pulling a chair from the corner and settling into it.
Aiko looked at Ji-yoo.
Looked at the radio on the bench, its green light pulsing steadily.
Looked at the cable that ran up through the conduit, through the steel and concrete, to the antenna on the roof that carried voices across five hundred meters of snow and silence.
She smiled.
A real smile.
Small, private, the kind that lived in the corners of the mouth.
"Hand me the soldering iron," Aiko ordered, low, her hand extended.
The radio hummed.
The green light pulsed.
And somewhere in the frozen distance, five hundred meters east, Elena Vasquez heard the static clear and knew that she was no longer alone.
The link was live.