The halls of Hope’s Peak Academy were silent until monitors flickered to life.

Monokuma spun onto every screen. “Upupu! Final Girl Phase! No boys, no trials! Executions replaced with Despair Density Expansion! Immobilized means eliminated! Last Ultimate standing faces the Mastermind!”

Doors sealed. Floor vents hissed. From the far end, Junko Enoshima limped forward, smiling. “You thought despair was finished?” She slammed a panel. All canisters activated. Gas poured from vents, spreading pale and thick across the hall.

Aoi dashed forward. Her legs thickened, jacket tightening across her shoulders. Her calves swelled, knees bending under sudden mass. Shoes scraped tiles as steps slowed. Akane charged blindly; her arms and torso expanded, stance widening. Floor tiles cracked under her growing weight. Ibuki’s sleeves strained as her arms and chest rounded. She gasped and collapsed into a half-sitting position. Kirumi stayed composed, skirt and jacket straining as thighs thickened, until her legs gave way.

Sakura planted feet firmly, muscles bulging as her density increased. Tiles fractured beneath her. Celestia adjusted gloves gracefully as her gown grew taut along sides, eventually tipping backward. Chiaki moved slowly, calculating odds as hoodie stretched, legs bending under weight. Other immobilized girls filled the hall in various stages of expansion, limbs thickening, torsos rounding, clothing pulling taut.

Junko advanced deliberately, forcing Mikan toward the densest mist. She kicked an overturned desk to clear a path. She laughed as the academy groaned under mounting strain. {{user}} stayed low, wet cloth pressed to nose. Breathing controlled, shoulders heavier, jacket tight, steps slow but precise. They weaved between growing bodies, ducking under debris, sliding past immobile girls. Junko noticed and smiled.

“All canisters at maximum!” she shouted. Her thighs and torso thickened, hips tightening under gas exposure, steps slow but determined. She hunted {{user}}, cornering them near a shattered column. Walls creaked, lights flashed, floor tiles warped beneath cumulative weight.

Every girl became immobile. Arms rounded, legs thickened, clothing strained. Junko’s advance slowed yet purposeful, her own density a challenge she embraced. She breathed deliberately, inhaling to maintain focus despite mass. Only {{user}} remained fully mobile, eyes tracking exits, breathing careful, jacket taut at shoulders and waist.

Junko collapsed under weight—not unconscious. Still smiling, she leaned against the floor. Gas began thinning automatically. Monokuma appeared: “Game One complete! Recovery Phase unlocked! 72:00:00 to assemble stabilizer components before density becomes permanent!”

Junko lay on cracked tile, laughing softly. “Run,” she whispered. “Let’s see how long hope lasts.”

The hall was filled with massive, immobile Ultimates, conscious but unable to move. Doors to the east wing unlocked with a heavy click. The timer began counting down. {{user}} glanced at the map on a monitor, calculating a path through hallways blocked by heavy, expanding classmates. Every step required extra effort; balance and friction made movement a tactical challenge. They touched walls for support, avoiding vents still releasing residual gas.

{{user}} moved cautiously, every step heavier than the last. Thighs rubbed together, hips and buttocks widened, breasts and shoulders felt dense, and small dimples formed on their skin. Even minor movements required effort, and each step reminded them that slow, relentless expansion could immobilize them if they didn’t act quickly.

Monokuma’s voice crackled from the monitors. “72 hours! Collect all stabilizer components or join the others in permanent immobilization!” Junko’s laughter drifted through vents, teasing. {{user}} tightened their grip on the walls, planning each step with the clock ticking down.