Chapter Text
For Momo Yaoyorozu, the world was a symphony of data. The weight of a steel beam, the tensile strength of a rope, the exact chemical composition needed to neutralize a toxic gas—it was all a language she mastered fluently. As he stood on the observation deck overlooking the sprawling simulated UA city, his mind was not on the simulated disaster below, but on the variables.
"Rescue Scenario Seven," she murmured, her dark eyes scanning the digital map drawn on her visor. "Gamma collapse zone. Forty-seven simulated civilians trapped. Key elimination points are compromised."
Beside her, Shoto Todoroki stood still as usual. He didn't look at the map; I observed the terrain, the way the "sun" (a set of high-power LED lights) fell on the eastern facades. He was a boy of the elements, capable of analyzing the environment in search of sources of water vapor, of shadows where the ice would last longer. His presence was a constant, discreet buzz in his peripheral awareness. To his analytical mind, he was like a radiator—the left side of his body emanating a faint source of ambient heat, the right exuding a coldness and stillness that had nothing to do with his Quirk.
"What's your assessment, Yaoyorozu?" His voice was low, a calm current in the river of chaos below. He always consults these tactical exercises. It was a gesture of respect that made his stomach tighten in a knot of complex emotions.
“The structural integrity of the main factory is compromised,” she said, pointing to a flashing red dot on the map. "We need to strengthen the central pillar before we can send in a ground crew. A hydraulic jack would be the most efficient solution. I can build one."
He nodded with a single firm nod.
"I'll create a heat shield to keep the debris from moving while you work. Then clear a path for evacuation."
It was a good plan. Solid. Logical. It was the kind of plan Momo made to a recommended student, the pride of the Yaoyorozu family. But as they descended into the simulated rubble, the knot in his stomach tightened. It wasn't the pressure of exercise. It was the way he trusted her. It was the weight of his gaze.
They worked in perfect harmony, without words. Shoto erected a wall of ice to prevent a secondary collapse, a crystalline structure shining with impossible beauty amidst the dust. Momo was close behind, exposing her pale, toned abdomen to manifest a high-voltage cable or medical kit for a "victim." Her Quirk was a miracle of biology, converting her lipids into any non-living material she could visualize on a molecular level. It required absolute focus. A single erroneous thought, a single fluctuation in your concentration, could result in a molecular failure.
And scattered thoughts were becoming a luxury she could no longer afford.
"Yaoyorozu, the central pillar," Shoto said, his voice cracking, as he held a huge concrete slab with a sheet of ice on it.
"On it," she replied, her voice steadier than she felt.
She closed her eyes, the world dissolving into a blueprint. Steel. A high-grade alloy. Carbon molecules locked in a precise lattice. Iron atoms, dense and strong. She pictured the hydraulic jack in perfect, three-dimensional detail, down to the last seal. She felt the familiar warmth spread across her skin as lipids rushed to the surface, ready to be shaped by her will.
"Create!"
The material erupted from her arm, solid and heavy. But as it formed, a strange sensation prickled at the edge of her focus. It was like a phantom limb, a presence in her chest that wasn't hers. It was a whisper of white, of softness, of something fragile. It was a complete contradiction to the industrial strength of the object she was willing into existence.
She opened her eyes. The jack was there, heavy and functional. But for a fraction of a second, she saw it. The surface of the steel wasn't perfectly smooth. For a fleeting moment, tiny, intricate forms were embossed into the metal—protuberances that were unmistakably organic. Small, white petals, waxy and cold, bloomed and vanished on the steel as quickly as they had appeared.
A gasp escaped her lips. A sharp, stabbing pain launched through her lungs, as if a thousand microscopic needles had pricked her from the inside. She stumbled, the jack falling to the ground with a deafening clang.
"Yaoyorozu?" Shoto was instantly at her side, his heterochromatic eyes wide with concern. The concrete slab he’d been holding was now a frozen sculpture, safe. But his focus was entirely on her. "What happened? Are you injured?"
"It's... nothing," she gasped, forcing a smile that felt like a grimace. She pressed a hand to her sternum, feeling the frantic flutter of her heart. "I think I just...pushed too hard. A momentary lapse in concentration. The jack is fine. It's perfectly functional."
He didn't look convinced. His gauze was too intense, too probing. He was analyzing her, just as she analyzed the world.
"Your face is pale. We can call for a substitute. Recovery Girl is on standby."
"No!" The word came out sharper than she intended. The last thing she wanted was a doctor, a scanner, or questions. The last thing she wanted was for anyone to see that her Quirk, the one thing she could absolutely control, had produced something so... chaotic. They are illogical. "I'm fine, Todoroki-kun. The simulation is the priority."
She picked up the jack and got to work, her movements rigid and precise. The pain in her chest subsided to a dull ache, a persistent reminder of the anomaly. But her mind was a storm. What had she seen? Petals? It was impossible. A hallucination from stress? Lack of sleep?
The rest of the exercise passed in a blur of mechanical actions. She created, she directed, she calculated. But a part of her was detached, observing the proceedings from behind a pane of glass. She watched Shoto move, his grace and power on full display. The way a lock of his dual-colored hair fell across his forehead. The focused line of his mouth when he used his fire. Each observation was a data point, but they no longer added up to a simple admiration for a classmate. They felt heavy. They felt like variables in an equation that had no solution.
After the exercise, after the congratulations from their peers ("Great job, you two! You work so well together!"), Momo made her way to the locker room. The walk felt longer than usual. The fluorescent lights of the hallway hummed with a frequency that vibrated in her bones. The air was thick with the smell of chalk dust and clean sweat.
She locked the door to a private bathroom stall and leaned against the cool metal, her breath coming in shallow, ragged gasps. The dam of her control finally broke. The pain in her chest, which she had been meticulously ignoring, erupted. It wasn't a cough; it was a convulsion, a deep, wracking spasm that doubled her over.
It was elegant and terrible. It wasn't the crude, hacking cough of a common cold. It was a forceful, purposeful expulsion. She felt something move, something solid and smooth, scraping against the walls of her trachea.
She opened her mouth, and into the sterile white sink fell a Camellia.
It was perfect. Flawless. The petals were a pristine, waxy white, unfurled in a perfect spiral around a cluster of golden stamens. A single drop of blood, a shocking spot of crimson, clung to one of the lower petals. It was the most beautiful and horrifying thing she had ever created.
Her hands trembled as she picked it up. It was real. It was solid. It had mass. It had a molecular structure. Her Quirk hadn't created it consciously. She hadn't viewed it. And yet, her body had produced it, pulling the material from her own lipids, from her own essence.
Momo Yaoyorozu, who could recite the periodic table from memory, who could calculate the Schwarzschild radius of a black hole for fun, stared at the flower in her hand and felt her entire understanding of the world fracture.
She knew the legend. It was a silly story whispered in the dorms late at night, a tragic romance trope in old dramas. Hanahaki Disease. A sickness born of unrequited love, where flowers bloom in the lungs, choking the life out of the afflicted.
But this was not a legend. It was science. His body, the world's most sophisticated breeding laboratory, was being hijacked. Her own individuality, the power of creation, was being used to build a monument to a feeling she was afraid to name.
"Shoto," she whispered to the empty room, the name a fragile echo against the tiles.
The flower in his hand was not a flaw in a steel beam. It was a molecular flaw in his own soul. It was the weight of a thousand unsaid things, finally taking shape. It was proof that, despite all her precision, despite all her analysis, she had failed to calculate the one variable that mattered most: her own heart. And now, with terrifying biological protection, that heart was building its own cage, one perfect white petal at a time.