The desert stretched on, a golden sea under a relentless artificial sun. Time blurred into a haze of heat and thirst.Yuma watched the holographic dispy, his mind running calcutions. 667 ml remaining. Five people. If we distribute equally, each gets 133.4 ml—below the 200 ml minimum. Someone will be eliminated at the 24-hour mark.Unless we find another source.But ARK had said three caches. Total 1000 ml. That was it. No more.Designed scarcity. Designed conflict."We need to talk about this," Ruri said, her voice strained. She stood facing Tsukasa, her hands on her hips. "You can't just take water without discussing it.""Discuss what?" Tsukasa shot back. "Who gets to die first? I wasn't waiting around for that.""But now you've put everyone in danger!""I was already in danger!" Tsukasa gestured to his own body, still trembling from the electric shock. "You think I can survive out here like this without water?"Yuma stepped between them. "Arguing won't change the numbers. We have 667 ml. We need to decide how to use it.""How?" Komachi asked, her voice barely audible. "There's not enough."Sakuya spoke up, his tone analytical. "There are several possible strategies. One: we distribute the water equally, accepting that someone will be eliminated. Two: we give all the water to one or two people, ensuring their survival while sacrificing the others. Three: we attempt to find a loophole in ARK's rules.""Loophole?" Ruri looked hopeful."ARK prohibited mutual-aid pacts," Sakuya expined. "But it didn't prohibit… other forms of cooperation. Perhaps we can find a way to share the water without formally agreeing to share it."Yuma shook his head. "Semantics. ARK will see through that.""Then what?" Tsukasa demanded. "We just stand here and bake?"As if in response, the holographic dispy changed again:Environmental Update: Temperature rising to 60°C.Heatstroke risk: High.Recommended action: Seek shade and hydrate."Great," Tsukasa muttered. "Now it's giving us advice."Yuma looked around. The desert offered no shade—just endless dunes under a featureless sky-dome. Artificial environment. Controlled variables. ARK can adjust temperature at will.Test conditions can change. Unpredictable."We need to move," Yuma said. "Staying here will dehydrate us faster. We should head toward… something. Anything.""What if there's nothing?" Komachi asked."Then we die." Yuma's voice was matter-of-fact. "But moving gives us a chance to find something. Staying guarantees dehydration."Ruri nodded. "He's right. We should go."They decided to head toward the highest dune—a distant peak that might offer a vantage point. Tsukasa leaned on Ruri, his steps slow and painful. Komachi walked beside Yuma, her eyes constantly scanning. Sakuya followed, observing. Hikari trailed at the back, silent.The heat was oppressive. Yuma felt sweat pouring down his back, his uniform soaked through. His throat was parched, his tongue sticking to the roof of his mouth. Dehydration setting in. Fast.How long can we st?He gnced at the holographic dispy, which floated alongside them as they walked. The hydration percentages were dropping steadily:Yuma: 91%Ruri: 92%Tsukasa: 97%Komachi: 90%Sakuya: 91%Hikari: 89%Hikari was lowest. Yuma noted it, his mind automatically calcuting probabilities. If trends continue, she'll be eliminated first.But trends could change. Variables could shift.Unpredictable.They reached the base of the high dune after what felt like hours. The sand was softer here, their feet sinking with each step. Climbing was exhausting."I… can't…" Tsukasa gasped, colpsing halfway up.Ruri knelt beside him. "We have to keep going.""Leave me." Tsukasa's voice was weak. "I'm dead weight.""No." Ruri's eyes filled with tears. "We're not leaving anyone."Yuma looked up the dune. The summit seemed impossibly far. Energy expenditure vs. potential reward. Uncertain.But what alternative was there?"We rest here," he decided. "Five minutes."They sank onto the hot sand, breathing heavily. The holographic dispy updated:Time remaining: 18 hours 22 minutesHeatstroke warning: ActiveRecommendation: Conserve energy"Conserve energy," Tsukasa ughed bitterly. "While climbing a sand dune. Great advice."Yuma ignored him, his mind racing. ARK's recommendations are part of the test. Maybe following them gives advantage. Maybe ignoring them triggers punishment.Unknown variables.He looked at Hikari. She sat apart from the others, her knees drawn to her chest, her face hidden behind her hair. She hadn't spoken since they'd arrived in the desert.What's going on in her head?Suddenly, she looked up. Her eyes met Yuma's, and for a moment, he saw something there—not fear, not confusion, but… calcution. Like she was running numbers too.Then she looked away.What does she know?ARK Control Room Log — UpdateTime: 18:22:15 (Station Retive)Subject: Resource Sandbox — Psychological Stress MetricsSample?04 (Hikari Aizawa): Hydration lowest at 89%. Stress indicators elevated but controlled. Unusual neural activity patterns detected—possible protocol interference.Sample?03 (Tsukasa Kirijima): Hydration advantage maintained. Injury worsening. Survival probability dropping despite hydration.Social?cohesion metric: 42% (critical low).Moral?conflict threshold: 91% (approaching crisis).Prediction: First elimination within 8?12 hours.Continue observation.

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