Chapter Text
The royal court of Aethelburg had never seen its king so undone.
Steve Rogers, the Iron-Fisted, the Conqueror of the Eastern Reaches, the man who had burned three cities to ash for defiance—sat upon his obsidian throne with the stillness of a cathedral saint. His knights whispered. His advisors trembled. For three days, he had not eaten. For three nights, he had not slept.
All because of a smudge of ink on his left wrist.
The soulmark had appeared at dawn on the first day—a delicate gear, half-formed, as though sketched by an uncertain hand. Steve had stared at it until his vision blurred. He had never believed in the old magic. Soulmates were a peasant's fancy, a comfort for the weak. He had married for alliance, killed for territory, and ruled through fear.
But the mark was real. And the moment it bloomed, something cracked open in his chest.
He sent every spy, every mage, every trembling herald into the lower city. "Find the owner of this mark," he commanded, voice low and terrible. "Find them, and bring them to me. Unharmed."
They found Tony Stark in a soot-choked workshop in the Ironmonger's Alley, forging a stolen piece of ore into a hidden blade.
He was beautiful in the way a snapped whetstone is beautiful—sharp-edged, grimy, full of hidden fracture lines. His hands were calloused. His eyes were the color of burnt whiskey. And on his left wrist, half-hidden beneath a leather cuff, was the matching gear.
Steve descended from the palace that night. No guard. No crown. He walked through the mud and the stink and the rain, and when he stood in the doorway of Tony's shop, he fell to his knees.
"I have searched for you my whole life," Steve said, and meant it. The man who had never begged was begging now. "I will give you everything. Jewels. Armies. My throne. Only stay."
Tony looked at him for a long, cold moment. Then he smiled.
"Your Grace," he said, with mocking sweetness. "You burned my village. Three years ago. You remember? Thornhaven. You killed my father because he wouldn't bow fast enough."
Steve went white. "I—"
"You didn't even look at him." Tony's voice was flat now. "Your knights trampled his body into the mud. And now you kneel to me?"
Steve's hands trembled. He wanted to say *I didn't know*. He wanted to say *I would take it back*. But he had spent a lifetime refusing to apologize, and the words turned to ash in his throat.
Instead, he said: "Let me make it right. Let me spend every day of my remaining years making it right."
Tony laughed. It was not a kind sound. "You don't get to make it right. You don't get to love me. That's not how this works."
He turned his back. Steve stayed kneeling in the rain until dawn.
---
What followed was a courtship the likes of which the kingdom had never seen—and a horror story to match.
Steve did not understand rejection. He had never needed to. So when Tony refused his gifts, he sent more. When Tony barred his door, he had the hinges replaced with gold. When Tony spat in his face, Steve cupped his cheek and called him *beloved*.
He had the master of the forge evicted from his shop and installed Tony in the royal workshop instead. He gave him unrestricted access to the palace vaults, the royal armory, the forbidden libraries. Anything Tony's clever fingers itched to build, Steve provided.
"You're a prisoner," Tony said one night, surrounded by every luxury imaginable.
"You're home," Steve replied, and meant it.
Tony began to smile less and less.
He started with small cruelties. Refusing Steve's touch. Breaking his gifts in plain sight. Sleeping with a kitchen maid just to watch Steve's jaw tighten. But Steve absorbed it all like a sponge, his devotion only deepening with every wound.
"You could kill me," Steve whispered once, in the dark of Tony's chambers. He had taken to sleeping outside Tony's door like a loyal hound. "If that's what it takes to earn your peace. I would hold still for you. I would thank you."
Tony's hands shook where he held a fire poker. "You're insane."
"I am yours," Steve corrected softly. "There's a difference."
---
The assassination attempt came on the longest night of the year.
Tony had spent six months building it. A crossbow disguised as a harpsichord key. A bolt coated in nightshade and despair-venom, harvested from the tears of widows Steve had made. He aimed for the heart.
Steve was signing a death warrant—some lord in the northern provinces who had refused to pay tribute. He did not look up when the mechanism clicked. Did not flinch when the bolt buried itself just left of his sternum.
He only looked at Tony. And smiled.
"Thank you," Steve said, blood blooming through his silver tunic like a dark flower. "For looking at me."
Tony dropped the key. His hands flew to his mouth. "No. No, no, no—you were supposed to dodge. You were supposed to *fight*."
"Why would I fight you?" Steve asked, genuinely confused. He swayed on his feet. The poison was fast. "You are my soulmate. My only purpose. If my death pleases you—"
"Shut up!" Tony was across the room now, pressing his palms against the wound, trying to stop the bleeding even as the venom turned Steve's veins black. "Don't you dare die for me. Don't you *dare*. I hate you. I hate you so much—"
"I know," Steve whispered. His eyes were already going glassy. "That's why I love you. Because you should. Because you should hate me. I deserve—"
He collapsed.
Tony screamed.
---
In the chaos that followed—guards rushing in, healers summoned, Tony dragged away in chains—no one noticed the shadow that moved through the palace like a wolf through snow.
Bucky Barnes.
The king's assassin. The Left Hand of Aethelburg. The man who had done every terrible thing Steve had ever commanded, and never once asked for mercy. He had been hunting for three days, tracking the poison's source, following the thread of betrayal back to its weaver.
But when he found Steve—pale as bone, pulse a fading whisper—Bucky did not draw his blade.
He drew a small clay vial from his belt. An antidote he had stolen from the very mage who had brewed Tony's venom. He had known, somehow. Had felt the wrongness in the air three days before the bolt flew.
"Don't you leave me," Bucky hissed, tipping the potion between Steve's blueing lips. "Don't you dare. You don't get to die until I say so. You don't get to leave me alone with what we've done."
Steve coughed. Gasped. The black veins retreated like serpents fleeing light.
Bucky held him through the shaking, through the sweating, through the long hour where death and life fought over Steve's body like wolves over a carcass. When Steve finally opened his eyes—dazed, confused, *alive*—Bucky's hand was still tangled in his hair.
"Tony," Steve whispered, his first word.
Bucky's face went cold. "He tried to kill you."
"He succeeded." Steve tried to sit up, failed. "I surrendered. I told him I would hold still. And I did. He gave me exactly what I asked for."
"That's not—" Bucky's voice cracked. "That's not love, Steve. That's not devotion. That's a man with a death wish and a crown."
Steve reached up, slow and trembling, and touched Bucky's jaw. "You saved me."
"Someone had to."
"You always do."
They stayed like that as the candles burned low and the palace settled into shocked silence. Outside, the kingdom waited to learn if its tyrant king had finally died. Inside, two men who had spilled oceans of blood held onto each other like shipwreck survivors.
Neither spoke of Tony.
Neither needed to.
In the dungeon, chained to a wall, Tony stared at his wrist. The gear was gone. The soulmark had vanished the moment Steve's heart stopped.
And then, an hour later—when Bucky's antidote did its work—it bloomed back. Brighter than before. Angrier. A scar in the shape of a promise neither of them knew how to break.
Tony laughed until he wept.
He had tried to kill a monster and failed. Worse: the monster loved him. Worse still: somewhere deep in the wreckage of his chest, beneath the hatred and the grief and the righteous fury, Tony was beginning to understand why.
Steve had burned his village.
But Steve had also knelt in the rain.
And Tony, who had never believed in mercy, was terrified to discover that he might be capable of it after all.
In the throne room, three days later, Steve sat in judgment. Tony stood before him in chains, head high, eyes defiant.
"You tried to murder your king," Steve said. His voice was calm. Almost gentle.
"Yes."
"The punishment is death."
Tony smiled. "Good."
Steve stood. Walked down the steps. Removed Tony's chains with his own hands. Then knelt again, there on the cold stone, in front of every lord and lady and knight in the realm.
"Then kill me instead," Steve said quietly. "And let him go."
The court erupted.
But Bucky, standing in the shadows, did not look surprised. He only closed his eyes and thought: There he goes again. Loving the wrong person in the wrong way and calling it righteousness.
And still—still Bucky did not leave. He never left. That was his own curse, his own soulmark, hidden beneath his sleeve where no one could see.
A shield.
Paired with no one.
Bound to a man who would never look at him the way he looked at a boy from a burned village.
But that, as they say, is another story.