The world didn't end with an explosion. It ended with silence. The kind of silence that tore Izuku's heart apart, not with a roar, but with a slow, agonizing pull, like a thread unraveling the very fabric of his being.

Izuku Midoriya heard it before he understood it. It wasn't the sound of an attack or a dying scream. It was the sudden, terrifying absence of Katsuki's husky, rough voice—a voice that had been a constant, abrasive, and beloved presence in his life for as long as he could remember. The battlefield, a chaotic symphony of explosions and cries moments before, seemed to inhale sharply and then forget how to exhale. Dust, thick and acrid, drifted through the air like funeral ash, clinging to Izuku's tongue and stinging his eyes. Shigaraki's decay had carved a crater into the earth—jagged, wrong, and impossibly deep. At the center of it, a small, crumpled figure lay impossibly still.

No.

The word was a cold stone in his stomach.

No, no, no—

"Kacchan!"

The name tore from Izuku's throat, raw and primal, a sound he didn't recognize as his own. His legs moved before his mind could catch up, pumping furiously across the ruined ground. He stumbled over a chunk of concrete, his ankle screaming in protest, but he didn't feel it. His lungs burned with the effort, his vision narrowing into a tunnel until all that existed was the unmoving figure in the dirt. The green energy of One For All crackled uselessly around him, a frantic, impotent spark. His heart slammed against his ribs, a desperate, caged animal begging the world to rewind, to give him one more second, one more chance to push Kacchan out of the way, to take the hit himself. But the world, cruel and indifferent, didn't listen.

A powerful arm locked around Izuku's chest, yanking him back just as he was about to fall to his knees beside Katsuki. He thrashed against the hold, a wild, feral thing.

"Deku—Izuku—STOP!! You can't—!" Kirishima's voice was thick with tears, his grip iron-tight, his own body shaking.

“Let me go!” Izuku’s voice cracked, splintering into a thousand pieces. He clawed at Kirishima's arms, leaving red welts. “Kacchan—Kacchan—!”

Mina appeared on his other side, her small hands grabbing his arm. Her usual bright, bubbly face was streaked with tears, her makeup a ruin. “Izuku, please—don’t look, don’t—” she pleaded, her voice a fragile whisper.

But he saw. God, he saw everything.

Katsuki's body lay in a crater of his own making, the ground around him singed and blackened. He was still clad in his hero costume, but it was torn and scorched. His gauntlets, those extensions of his fiery will, were shattered into twisted, useless metal. His spiky ash-blond hair, usually so vibrant and defiant, was matted with dust and grime. A thin trickle of blood traced a path from the corner of his mouth down his chin. His eyes—those fierce, crimson eyes that had always burned with life and challenge—were closed. He looked like he was only sleeping, like he'd wake up any second, scowl at Izuku for making such a pathetic fuss, and shove him away with a gruff "Tch, quit cryin', nerd."

But the stillness was too profound. His chest didn't rise. The proud, aggressive set of his shoulders was gone.

Izuku’s knees buckled. The strength drained from him like water from a shattered vase. He collapsed so hard the impact rattled through his bones, a sharp, jarring pain in his knees. A sound was torn from his throat—a keening wail that didn’t even feel human, a sound of pure, unadulterated grief. Kirishima held him upright, his own arms trembling with the effort, his breath coming in ragged sobs. Mina pressed her forehead to Izuku’s shoulder, her quiet sobs muffled against his torn costume.

Through the haze of his despair, Izuku saw movement. The medic with the revival quirk, a woman with a kind face now hardened by grim duty, knelt beside Katsuki. She placed her glowing hands on his chest.

The entire battlefield held its breath.

Izuku watched, his own breath frozen in his lungs. A desperate, shaking hope, fragile as spun glass, flickered in his chest. *Please. Please. Please.*

A soft, golden glow emanated from her palms, sinking into Katsuki’s body. For a moment, a spark flickered—a faint, hesitant pulse of energy. Izuku saw it, his heart leaping into his throat. The world seemed to teeter on the edge of salvation.

And then—

Nothing.

The glow sputtered and died. The medic’s face, once a mask of concentration, crumpled. She withdrew her hands, her shoulders slumping. She turned to look at Izuku, and the utter defeat in her eyes was a death sentence.

“I’m… I’m sorry,” she said, her voice barely audible. “It’s not taking. The damage is too extensive. His life force… it’s gone.”

Gone.

The word was a bomb, detonating in Izuku's skull.

Izuku’s scream tore through the air, a ragged, agonized sound that seemed to crack the very sky above them. It was a sound of absolute, soul-shattering loss.

He lunged forward again, his body moving on pure instinct. He needed to touch him, to hold him, to will him back to life through sheer force of love. But Kirishima held him back, his grip desperate and strong.

“Izuku—please—he’s gone—” Kirishima begged, his voice hitching.

“No!” Izuku clawed at the ground, at the air, at Kirishima’s arms, at anything that could anchor him to a world that now felt hollow and meaningless. “He promised—he promised he’d stay—Kacchan, please—wake up—wake up—!” His pleas dissolved into sobs so violent they wracked his entire body, each one a fresh wave of pain. He could taste salt and dust and the metallic tang of blood. He could feel the rough texture of the ground beneath his knees, the warmth of Mina's hand on his shoulder, the crushing weight of Kirishima's arm. But all he could see was Katsuki, so close and yet impossibly far.

The sky above them was a mocking, painfully clear blue. Unchanged. Uncaring. The sun continued to shine, as if the most brilliant star in Izuku's universe hadn't just been extinguished.

A torrent of memories, each one a sharp shard of glass, pierced his heart as he sobbed.

He remembered Katsuki at four years old, with chubby cheeks and a wild mane of blond hair, tugging him toward the riverbank. "Come on, Deku, you're so slow!" he'd shouted, his voice high and demanding, but his grip on Izuku's hand was warm and sure.

He remembered Katsuki at ten, standing on a playground, eyes bright with unwavering ambition. "I'm gonna be the number one hero," he'd declared, a cocky grin on his face. Izuku had believed him, even then.

He remembered Katsuki at fourteen, his eyes a storm of anger and hurt, pushing Izuku away with sneers and explosions. It wasn't until years later that Izuku understood he was pushing the world away because he didn't know how to do anything else. He remembered the guilt that gnawed at him, the tangled knot of resentment and admiration he'd felt.

He remembered Katsuki at sixteen, in the aftermath of the war, his voice trembling as he whispered, "I'm sorry… for everything." The words had felt like a knife, but a healing one. It was the first time Katsuki had allowed himself to be that vulnerable.

He remembered Katsuki at seventeen, grabbing his hand after a particularly brutal mission, his jaw tight. "Don't scare me like that again, nerd," he'd muttered, his voice gruff, but his fingers were intertwined with Izuku's. It was a threat, but Izuku heard the love underneath.

He remembered Katsuki at eighteen, kissing him for the first time. It had been in Izuku's cramped apartment after a patrol, the rain lashing against the window. The kiss was messy, fierce, and terrified, but it was also perfect. It tasted like cinnamon and a faint hint of nitroglycerin.

He remembered Katsuki last night. He'd been leaning against the kitchen counter of their shared apartment, a stolen bite of Izuku's katsudon halfway to his smirking mouth. His eyes, the color of carmine, had held a familiar challenge. "You're hopeless, Deku," he'd said, but his voice was soft. "Good thing you've got me."

Izuku had laughed then, a feeling of unadulterated peace washing over him.

Now, that future, that promise of "good thing you've got me," felt like a cruel joke. The brightest part of his life was gone, leaving behind a silence so profound it felt like he was drowning. And all he could do was scream into that abyss, begging for a world that would never answer.