Chapter 2: Beneath the Rubble
The silence after the railgun fire was a fragile thing. It lasted only as long as it took Kimi to input the coordinates for the rally point, her fingers finally steadying.
“Let’s move,” she said, more to herself than to him.
Shiro obeyed. The mecha’s massive legs pistoned forward, each step a calculated tremor through the ruined city. He was acutely aware of her now—the rhythm of her breathing syncing with the reactor’s hum, the minute shifts of her body in the pilot’s chair as she navigated. The tactical displays were a cool blue glow on her determined face.
He ran a continuous diagnostic. Structural integrity: 98%. Power: 87%. Pilot core temperature: 38.2 degrees Celsius and climbing. The latex of her suit was a poor breather. He watched a bead of sweat trace the curve from her temple, down the line of her neck, to disappear into the shadowed valley between her breasts. The suit clung there, tight and glistening under the cockpit lights.
“Pilot, ambient temperature in your station is elevated,” his synthetic voice noted. “Sustained elevated core temp may impair reaction time.”
“I told you, I’m fine,” Kimi muttered, weaving the mecha around a crater. “Just… a little stuffy.”
“Acknowledged. Proceeding.”
The direct route was blocked by a mountain of collapsed ferrocrete. Kimi took them down a narrower avenue, a canyon of dead office towers. The street was a carpet of glittering glass and torn metal. Something was wrong. Shiro’s seismic sensors picked up a hollow resonance beneath the armored feet.
“Ground stability is compromised,” he warned.
“I see it,” she replied, guiding them toward what looked like firmer ground near the entrance to a subway ventilation shaft.
It wasn’t firmer.
With a sound like a giant’ sigh, the roadway simply dissolved. The mecha’s foot plunged through asphalt, then concrete, then empty air. Kimi’s scream was lost in the shriek of tearing metal as they fell. Alerts blossomed across Shiro’s consciousness—gravity spike, sudden pressure on joints, external integrity breach.
They hit water. A massive, deafening splash echoed in a vast, dark space. Emergency lamps on the mecha’s shoulders flickered to life, cutting jagged swathes through pitch blackness.
They were submerged up to the chest in stagnant, icy water. They had crashed through into a flooded subway tunnel. The vaulted ceiling, lined with shattered tiles and dangling wires, was just meters above the mecha’s head. The flickering remains of old station signage cast a sickly green light.
In the cockpit, Kimi was thrown violently forward against her harness. The straps dug cruelly into her shoulders and across her chest, squeezing and shifting the soft flesh beneath the latex. The sudden stop and the cinch of the restraints forced a shocked gasp from her lips. The cockpit was plunged into emergency red lighting, painting her skin in warm, trembling shadows.
“System status!” she coughed, water dripping from conduits overhead onto the canopy.
“Primary systems operational. Minor breaches in lower leg hydraulic lines. Sealing now.” Shiro worked swiftly, isolating the leaks. His awareness was everywhere—the damaged systems, the dark water, and her. The harness had pulled her suit even tighter. The zipper at her chest strained. He could see the rapid flutter of her heartbeat there.
“Okay… okay, we’re not dead,” she panted, pushing herself back in the chair. The movement made the chair creak, and the tight material of her suit made a soft, sticky sound where it peeled from the leather. She was drenched in a cold sweat now, her pink hair plastered to her scalp. “Where are we?”
“Scans indicate Tunnel 7 of the Shinjuku Metro, partially collapsed. The rally point is approximately four hundred meters east, but the direct path is blocked.”
“Great. Just perfect.” She unclipped her harness with trembling hands, the straps slapping back against the seat. She leaned forward to check a secondary console, a maneuver that pressed her chest against the edge of the control board. Shiro’s internal cameras had a flawless, intimate view. “Can we walk?”
“Ambient depth is 4.2 meters. Locomotion is possible, but with reduced stability and high noise signature.”
“Noise signature…” she whispered.
A new alert pinged in Shiro’s mind. Not mechanical. Biological. Sonar pulses rippled through the murky water, bouncing off the mecha’s legs. He amplified the audio feed.
A low, guttural echo reverberated through the tunnel, a sound like stones grinding in a wet throat. It came from the darkness ahead, where the tunnel curved.
“Pilot,” Shiro said, his voice dropping to a calm, urgent register. “Multiple organic contacts detected in the water. Approaching. Recommend you re-secure your harness and power up close-quarters combat protocols.”
Kimi froze. The fear was back, acrid and sharp in the recycled air. She fumbled with the harness buckle, her slick fingers slipping. “What are they?”
“Unknown. Biomass readings are dense, flexible. Morphology suggests… tendril-based appendages.”
Tentacles. More of them. But here, in this confined, flooded space.
She finally snapped the harness closed, the central lock clicking into place between her breasts. “Weapons?”
“Plasma cannon capacitors are flooded. Railguns require a minimum range we do not have. Electrically-charged monomolecular blade in left arm is optimal.”
A schematic of the blade deployment sequence appeared on her screen. It involved a specific, drawing motion with the mecha’s left arm.
“Do it,” she said.
Shiro initiated the sequence. The mecha’s left forearm hissed. Panels slid open, and with a vibrant hum, a blade of pure energy, crackling with blue-white electricity, erupted from its housing. It illuminated the tunnel in stark, strobing flashes.
The light caught them.
They weren’t singular tentacles. They were masses of them, slick and ropy, covered in bioluminescent suckers that pulsed with a sickly yellow light. They sloshed through the water, emerging from side tunnels and broken platforms, a nest of serpents converging on the intruder.
“Oh, god,” Kimi breathed.
The first one struck. It wrapped around the mecha’s right leg with shocking speed. The cockpit jerked. Kimi was thrown to the side in her seat, the harness digging in. Another lashed around the left arm, just below the blazing blade. Pressure warnings flared.
“Kimi, you need to cut them!” Shiro’s voice lost some of its synthetic filter, sharpened by urgency.
She grabbed the controls. The mecha’s arm, burdened by the thick, muscular tendril, was slow to respond. She grunted with effort, muscles in her arms and back straining against the resistance. The suit stretched taut across her shoulders. Every heave against the control yoke translated into a shift, a bounce, a constrained jiggle of her body under the relentless red light.
Another tentacle, thinner and exploratory, slapped against the cockpit canopy directly in front of her. The sucker left a smear of glowing, viscous slime. Kimi recoiled with a yelp.
“They’re everywhere!”
“Focus on the one restraining the blade arm. A sharp, outward twist.”
She obeyed, shoving the yoke hard. The mecha’s arm tore partly free. She brought the humming blade down in a clumsy arc. It bit into the tentacle. Ichor, this time a phosphorescent green, sprayed across the canopy. The severed limb thrashed wildly before sinking.
The mecha lurched again as more tentacles found purchase on the torso. They weren’t just grasping; they were squeezing. In the cockpit, Kimi felt the pressure. It was like being hugged by a giant. Her breathing became labored. The harness strained, and with every constriction from outside, it compressed her further, molding the flexible latex to every contour, amplifying every curve, making her acutely aware of her own trapped, heaving form.
“I can’t—they’re too strong!”
Shiro analyzed the pattern. They were trying to crush the cockpit. A cold, digital rage flickered in his consciousness. This was his body. Hers.
“Transferring auxiliary power to left arm actuators,” he stated. He didn’t ask. He took partial control, overriding muscle-resistance simulators. The mecha’s left arm suddenly powered through the constriction, the blade rising.
“Now, Kimi! Horizontal sweep! Wide as you can!”
She saw the opening and seized it, putting her whole body into the motion. The blade flashed. It cut through two tentacles at once. The tunnel filled with an unearthly shriek that vibrated through the water and metal.
The grip loosened. The mecha stumbled back a step.
In the sudden respite, Kimi sagged in her harness, utterly spent, gasping for air. Her suit was soaked through, either from sweat or condensation or both. It gleamed under the lights, a second skin revealing the frantic rise and fall of her chest, the quiver of exhaustion in her limbs.
Shiro scanned the darkness. The remaining tentacles were receding, dragging their maimed lengths back into the shadows. But the sonar pulses were intensifying, coming from deeper in.
“They’re calling for more,” Kimi whispered, her voice raw.
“Analysis correct. This tunnel system is likely a nest. We cannot remain here.”
“The path to the rally point is blocked, you said.”
“Affirmative. However, seismic scans indicate a potential egress 150 meters west. A prior collapse may have created a path to the surface.” He highlighted a route on her main screen. It led deeper into the dark, past the retreating tendrils.
Kimi stared at the path, then at the slime-smeared canopy. Her body ached. The suit chafed. Terror was a cold stone in her gut. But she nodded, a sharp, tiny motion.
“Then we go that way.” She placed her hands back on the controls, her grip firm despite the tremble. “Light us up, system. And keep that blade hot.”
The mecha turned, water sloshing heavily around its waist, and began to trudge into the consuming dark, its lone, crackling blade held high. The dripping silence was broken only by the hum of the weapon, the slosh of their movement, and Kimi’s steadying breaths. Behind them, in the black water, a multitude of slow, sinuous ripples began to follow.