We wait longer than feels reasonable. Nothing happens, which somehow makes it worse.
"We can't just stand here until someone makes us move," Areum says, finally, arms crossed against a cold that isn't actually cold, just the specific chill of a room that hasn't decided yet what temperature it wants to be. "Waiting's not a plan either."
"It was a plan for exactly as long as it worked," Jung-su says. "It's stopped working."
He's right. The ribbing overhead hasn't settled once since we landed, shifting in slow increments too small to catch happening and too large to ignore once they've already happened, like watching a clock with no visible hands and somehow still knowing time's passing.
"We move together," I say. "Nobody more than an arm's length from someone else. If the geometry's going to lie to us, it can lie to all of us at once or not at all."
Nobody argues. Nobody's got a better idea to argue with.
Somewhere else in this building, I already know, other people are having this exact same argument with themselves, arriving at their own version of the same decision. That's the quiet horror of a room this size — we're never the only ones figuring it out in real time, just the only ones I can actually see doing it.
Mrs. Bae's already got a hand on Su-min's shoulder, steering him gently into the middle of the group where the fewest surfaces can reach him. "Stay between us," she says. "Not because you're weak. Because that's just where the safest spot is tonight, and someone has to stand there."
"Okay," Su-min says, small, grateful for the specific way it's framed.
"For what it's worth," Jung-su adds, not looking at him directly, "everyone in this group started out exactly where you are right now. Nobody here was born knowing how to survive this. We just had a room that happened first."
"Doesn't make it feel any less like luck," Su-min says.
"It's not luck. It's arithmetic." Jung-su's voice stays flat, matter-of-fact, no comfort dressed up as anything softer than it actually is. "You're still here. That's the only number that's mattered so far tonight."
Vincent's already muttering to himself, half-formed calculations under his breath, glancing at the walls like he's trying to catch them mid-shift. "If the geometry updates based on observation, that's not architecture behaving like architecture. That's architecture behaving like a wave function. I don't love that comparison. I'm making it anyway."
"In English," Areum says.
"The room might work like it's being watched into existing. Looking at something might be what lets it decide what shape to be." He shrugs, uneasy with his own conclusion. "I could be wrong. I'd like to be wrong."
* * *
The corridor we pick looks ordinary enough at first, curved walls narrowing gently, floor sloping down at an angle so gradual I almost don't notice we're descending until my knees start complaining about it.
Su-min walks close to Yuna, one hand fisted in the back of his jacket, not embarrassed about it at all anymore. Nobody would blame him if he was.
"There," Vincent says, stopping short. "Look at the floor ahead. Really look at it."
I look. It's fine. Same pale curve, same uniform light, nothing wrong with it that I can actually name.
"I don't see it."
"That's the point." He crouches, careful, not stepping any closer. "The angle's wrong for the light source. If light's coming from everywhere the way it has been all night, that patch of floor should be exactly as bright as everything around it. It's a half-shade darker. Something's between us and it that isn't actually there yet."
Jung-su tosses a coin-sized fragment of debris ahead of us, underhand, gentle. It lands on the floor with an ordinary sound and skitters to a stop, perfectly normal, perfectly solid.
"Maybe you're wrong," Areum says.
"Maybe. Sixty percent confidence, not ninety." Vincent doesn't move any closer regardless. "I'd still rather test it with something that isn't a person."
* * *
Su-min steps forward before anyone can stop him.
Not on purpose — his foot catches Yuna's, a stumble, nothing more, and it puts him one half-step past where the rest of us are standing, directly onto the patch of floor Vincent flagged.
She doesn't fall through it. That's almost worse than if she had.
The corridor beyond him simply isn't the same corridor anymore. I can see it change — not a jump-cut, not a flicker, just a slow correction, like the space is quietly deciding it prefers a different version of itself now that someone's standing inside it. The walls pull back, the ceiling rises, and Su-min is suddenly twenty feet further away than he should be, already turning, already realizing something's wrong before any of us can shout it at him.
"Don't move," I call, too late, the same word I've learned to say too late more times than I want to count.
He freezes anyway, more out of instinct than obedience, and the corridor stops correcting itself the second he does — like it only rewrites itself for people still trusting their own eyes to tell them where the floor is.
"Su-min." Yuna's voice, steady, pitched to carry without shouting. "Look at me. Not the walls. Just me."
"I can't — I don't know which way is actually back to you anymore. It looks the same in every direction now."
"That's because you're still looking." Vincent's voice, tight but controlled. "It's not lying to your feet yet. Only to your eyes."
"That's easy for you to say from over there."
"It's not easy. It's just true." He's already moving as he says it, slow, deliberate steps toward her along the wall, one hand trailing the curve of it. "I'm about to prove it works on me first, if that helps."
"Close your eyes," Vincent shouts, before I can think of the same thing myself. "Don't look at anything. Just feel for the wall and follow it back toward us."
"That's insane."
"It's the only variable we haven't tested yet." He's already moving toward Su-min himself, one hand tracing the curved wall at his side, eyes shut, feeling his way forward step by careful step. "Sight's the compromised sense. Touch isn't. Trust your hands, not your eyes."
It shouldn't work. It works anyway — Su-min closes his eyes, palm flat against the wall, and takes one step, then another, and the distance between him and the rest of us doesn't stretch any further. If anything, it shrinks, the space folding back down to something closer to honest the less either of them looks directly at it.
* * *
Jung-su reaches him first, wordless, guiding his hand to his shoulder the second he's close enough, and only then does he open his eyes again, gasping like he's surfaced from actual water instead of thirty feet of wrong hallway.
A case of literary theft: this tale is not rightfully on Amazon; if you see it, report the violation.
"I'm okay," he says, shaking. "I'm okay. I don't understand what just happened, but I'm okay."
"You will understand it," Vincent says, opening his own eyes again, breathing harder than the walk should have cost him. "Give it a minute. It's not a complicated rule once you've lived through it once."
My wrist gives a small pulse, HP steady, untouched, and I check it anyway, the same reflex I can't seem to switch off anymore.
"That's the trick," I say, half to the group, half to myself, working it out loud the only way I know how to think fast enough. "It needs us to trust what we're seeing. The second we stop, it loses whatever grip it has."
"Congratulations," a new voice says, dry, American, entirely unbothered by the fact that a hallway just tried to eat someone. "You just solved in one try what took me an hour and a stubbed toe."
* * *
He's leaning against the curved wall a dozen feet back, rifle slung loose across his chest, deep-South drawl thick enough to make Jung-su blink twice before answering.
"Who are you," Jung-su says, staff already angled, not quite pointed at him, not quite not.
"Chris." He pushes off the wall, unhurried, hands loose and open, the specific easy posture of someone who's decided a fight isn't worth starting yet. "Sorry for the eavesdrop. Been picking my way through this building for the better part of an hour looking for anyone who wasn't already lost in it."
"You've been here that long."
"Longer than I'd like. Whole squad I landed with scattered inside twenty minutes. Found two of them again. Lost 'em a second time when the hallway decided it didn't like where we were standing." He says it lightly, but something tightens around his eyes that doesn't match the drawl at all. "Y'all seem to have a better handle on this particular flavor of nonsense than I do."
"We've had more practice with different flavors," I say. "This one's new to all of us too."
"Comforting." He falls into step without waiting for an invitation, easy, like joining strangers mid-crisis is just another Tuesday. "Name's Hyunmin, was it? Heard you shouting it a minute ago."
"Yeah."
"Chris Boone. Stationed out of Yongsan, or I was, before tonight rearranged my whole schedule." He glances at Vincent, at the staff in Jung-su's hand, at Areum's crossed arms and the careful way she's sizing him up. "Y'all mind if I stick close? Two groups navigating the same maze blind is probably safer than one."
"Depends," Areum says. "You good in a fight, or just good at talking your way into one?"
"Bit of both, ma'am, if I'm honest." He grins, easy, disarming, the kind of grin that makes you want to underestimate him. "Mostly the second one, though. I'll let my aim do the talking on the first, if it comes to that."
"Where's your squad now," Jung-su asks, not lowering the staff yet.
"Wish I knew. Radio's dead, obviously. Last I saw of Danny and Park, they went left at a fork that isn't there anymore. Been circling back to the same three feet of hallway for the better part of twenty minutes trying to find them again." Something flickers under the easy drawl, gone before it can fully surface. "Didn't want to say that part too loud. Bad for morale."
"You should've led with that," I say.
"Would you have trusted me faster if I had?"
I don't have a good answer to that, so I don't give him one.
"He's not wrong to hold it back," Vincent says, quiet, mostly to me. "Strategically. Information rationing under uncertainty is a legitimate approach, even if it reads as evasive."
"Careful," Chris says, amused despite everything. "Man's about to defend my honor with a flowchart."
"I don't build flowcharts under duress. I do probability trees. Different tool entirely."
"Noted. My mistake."
Areum finally lowers her own guard a fraction, some read she's made that the rest of us haven't caught up to yet. "You're funnier than you look," she says. "That's usually a good sign or a very bad one. Rarely in between."
"I've been told that before. Usually right before something goes wrong."
"Comforting," she echoes back at him, dry.
"Wasn't trying to be. Just honest." He shrugs, easy, and something about the gesture reads as more competent than the drawl wants you to believe, like a man who's spent a long time letting people underestimate exactly how much he's actually tracking.
Nobody argues about him joining. There isn't a version of tonight where turning away a working rifle and a second set of eyes makes sense, blind eyes or not.
* * *
We keep moving, ten of us now, hands on shoulders, on walls, on whatever is closest. Nobody trusts their eyes farther than they absolutely have to.
"How many of you are there," Chris asks, quiet, falling into step beside me. "Total, I mean. Feels like there's more of you than there should be for one room."
"Seven, counting you. It grows."
"Grows how."
"Badly, mostly. Sometimes it grows the other way too." I don't elaborate further. There isn't a short version of Yohan that doesn't cost something to say out loud, and tonight's already spent enough of me.
He doesn't push. Something in his face says he's already guessed the shape of the answer without needing the details.
"Lost people myself," he says, after a moment, quiet enough that it doesn't feel like an invitation to ask more. "Different room. Different reasons. Doesn't get lighter to carry just because it happened somewhere else."
"No," I agree. "It doesn't."
Su-min walks close behind us, one hand still fisted in the back of Yuna's jacket, eyes fixed determinedly on the middle distance rather than the walls. "Is it always like this," he asks, to nobody specifically. "Meeting more people. Losing people. All of it happening at the same speed."
"Pretty much," Areum says. "You get used to the rhythm of it eventually. Never used to the actual losing part. Just the rhythm."
"That doesn't sound like something you get used to. It sounds like something you just survive repeatedly."
"No," Jung-su says. "It really isn't the same as getting used to it. It's just the truth, and out here that's usually worth more than a softer answer would be."
Chris glances sideways at that exchange, something thoughtful crossing his face for the first time since he introduced himself. "Y'all have a whole philosophy worked out already," he says. "That's either impressive or terrifying. Might be both."
"Give it a few more rooms," Vincent tells him. "You'll have one too, whether you want it or not."
"Looking forward to it," Chris says, and somehow manages to sound like he mostly means it.
We find them sooner than Chris expects — a shout, rounding a curve that shouldn't connect to anywhere we've already walked, and there's a young woman crouched over a man in fatigues, hands moving fast and sure over a leg wound that should be bleeding worse than it is.
"Park!" Chris is already moving, rifle forgotten against his back. "You're alive, you son of a—"
"Barely," Park manages, teeth gritted. "Tripped chasing a hallway that wasn't there. Would've bled out if she hadn't found me."
The woman doesn't look up from her work, hands steady, movements economical in a way that reads as trained rather than lucky. "Pressure first, panic later," she says, mostly to herself, tightening a strip of torn fabric around the wound with practiced efficiency. "You're not dying tonight. Not on my count."
"Ha-eun," she adds, glancing up at the rest of us for the first time, sizing us up fast and clinical, the same way a nurse reads a waiting room. "Nursing student, before all this. Or I was. Not sure what to call myself now."
"You're the reason he's still talking," I say. "That's a good enough title for tonight."
She almost smiles at that, tired, focused. "Ask me again once I've actually stopped the bleeding properly. This is a stall, not a fix."
Vincent crouches down beside her, watching her hands with real interest despite everything else happening around us. "That's a good knot. Efficient. Where'd you learn that under this kind of pressure?"
"Nursing school doesn't cover monster attacks specifically. Turns out the fundamentals transfer better than you'd think." She ties off the last loop, checks Park's pulse with two fingers, exhales like she's been holding her breath the whole time. "He'll live. Assuming nothing else in this building decides to test that assumption."
"Don't jinx it," Park says, weak but grinning.
"I don't believe in jinxes. I believe in blood loss and infection risk. Those are the actual threats." She stands, brushing debris off her knees, already scanning the corridor the way the rest of us have learned to. "You're the group everyone's been talking about. The one that keeps growing."
"Word travels," Areum says.
"Word's the only currency that actually means anything out here." Ha-eun looks at Park, at Chris, at the rest of us crowded into a hallway that's still deciding what shape it wants to be. "Mind if we tag along? I don't love our odds finding our own way out of this specific nightmare alone."
"The more hands, the better," I say. "Especially hands that know what they're doing with a wound."
"Good. Because I've got a feeling tonight's not done asking for those yet."
Park gets to his feet slowly, testing the leg, wincing but upright. "Guess I owe you my life," he tells Ha-eun. "Feels like a strange thing to say to someone I met an hour ago."
"Everything out here is a strange thing to say to someone you met an hour ago. You'll get used to the register." She hands him back his own weight, one shoulder under his arm until he's steady. "Don't thank me properly until we're actually somewhere safe. I don't trust gratitude that hasn't survived the whole night yet."
"Fair," Park says, and doesn't argue further.
Mrs. Bae's already assessing Ha-eun with the same brisk approval she gives anyone who proves useful fast. "You'll do," she says, which from her is closer to a medal than most compliments manage. "Stay close to the front. We'll need those hands where we can reach them."
"Yes, ma'am," Ha-eun says, and falls into step without hesitation, like taking direction from someone who clearly knows what she's doing is the easiest thing she's done all night.
Ten of us now, counting Park still limping between Chris and Ha-eun. Ten names: the seven who entered together, Chris, Ha-eun, and Park. I count twice because this building has already taught me what an inaccurate head count costs.
Somewhere ahead of us, deeper into a building that still hasn't finished deciding its own shape, the corridor bends again, patient, unhurried, waiting to see which one of us it gets to try next. Whatever it decides, it's going to have to get through nine of us to get there, and for tonight, at least, that math is the only comfort I've got room left to carry.