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The thing about Steve was that he was always warm. It was one of the first things Tony had noticed when they’d gotten close enough for it to matter. No matter the season, no matter the circumstance, Steve ran hot, like a furnace beneath his skin, and Tony—colder than he used to be, colder than he should be—gravitated toward that warmth like it was the only thing keeping him alive.
Tonight was no different. They were tangled up together in Tony’s bed, sheets barely covering them, the world quiet for once. The low hum of the arc reactor was the only real sound in the room, pulsing steadily like a second heartbeat. Tony had his head tucked beneath Steve’s chin, Steve’s arm wrapped around his waist, their legs a mess of heat and tangled limbs.
“You’re freezing,” Steve murmured, his lips brushing against Tony’s hair. His fingers traced slow, absentminded shapes along Tony’s back, then lower, along his ribs, pressing just enough to remind Tony he was there. That he wasn’t going anywhere.
Tony huffed a soft laugh, tilting his head so he could look up at him. “And you’re basically a walking space heater. Kind of evens out.”
Steve chuckled, but his hand kept moving, fingers skimming under the hem of Tony’s shirt, then stilling just above the glow of the arc reactor. Not touching, just resting there, hovering. Close enough to feel the warmth of it.
Tony tensed before he could stop himself.
Steve must have noticed, because he hesitated, his brows drawing together. “Does it—” He stopped, then tried again. “Does it hurt?”
Tony let out a slow breath, forcing himself to relax. “Sometimes,” he admitted. “But not really. Not anymore.” He paused, tilting his head. “It used to, though. When it was new.”
Steve’s fingers flexed against the fabric of his shirt. “Can I see it?” His voice was soft, careful, like he wasn’t sure if he should ask.
Tony swallowed, something tight catching in his chest.
Not many people had seen the arc reactor up close like this. People had seen it through his shirts, sure, or on TV, glowing defiantly beneath the suits he wore. But bare, unshielded, vulnerable? That was different. That was personal.
But this was Steve.
So Tony nodded.
He shifted, reaching for the hem of his shirt. His fingers hesitated for half a second before he pulled it up, letting the fabric bunch beneath his arms. The arc reactor lit up the dim room, casting soft blue light against Steve’s face. The glow caught in his eyes, and for a second, he just stared.
Tony wasn’t sure what he expected—pity, maybe, or that brief flicker of discomfort he’d seen in others before. But Steve only looked at him like he always did, steady and warm and entirely unafraid.
His fingers ghosted over the edge of the reactor, hesitant at first. “It’s beautiful,” he murmured, like it was the simplest truth in the world.
Tony huffed a quiet, breathless laugh. “Yeah, you don’t have to say that.”
Steve looked at him then, really looked at him, and his expression softened. “I mean it,” he said. His hand lifted, knuckles brushing against Tony’s sternum, just above the arc reactor. “This is you.” His thumb traced along the edge of the circular metal, barely skimming over the warm glass of the core. “I don’t just love parts of you, Tony. I love all of you.”
Tony’s breath caught.
For a moment, he couldn’t find words. They lodged somewhere in his throat, tangled up with a thousand old fears and half-formed defenses he’d learned to build over the years.
But then Steve leaned down, pressing the softest kiss to Tony’s collarbone, just above the arc reactor, and Tony exhaled.
Something in him—something he hadn’t even realized he was holding—unraveled.
He reached up, covering Steve’s hand with his own, holding it there over the glow of his heart. “Yeah,” Tony murmured, voice rough, a little unsteady. “Okay.”
And for the first time in a long, long time, he let someone see him. Really see him.
No armor, no distractions. Just this.
Steve didn’t move his hand, and Tony didn’t pull away. They stayed like that, caught in the quiet between them, the arc reactor casting its soft glow over Steve’s fingers where they rested against Tony’s chest.
Steve traced slow, careful circles along the edge of the casing, barely even touching it, like he was memorizing the shape of it. “Does it feel like anything when I do this?” he asked, voice low, reverent.
Tony blinked, momentarily distracted by the way Steve was looking at him—like he was something worth holding onto.
“It’s… weird,” Tony admitted after a second. “Not in a bad way. Just—” He gestured vaguely with one hand. “I don’t really feel it the way I feel everything else. No nerves, just pressure. A reminder that it’s there.”
Steve nodded like that made sense, but his hand didn’t move away. If anything, he spread his fingers a little wider, his palm warm over Tony’s ribs, grounding him. “I used to think about it a lot,” he said. “Before we—” He broke off, exhaling through his nose. “Before us.”
Tony tilted his head. “Yeah?”
Steve’s gaze flickered up to meet his. “I always wondered if you hated it.” His thumb ran a slow, absentminded path just above the edge of the arc reactor. “If it felt more like a cage than a second chance.”
Tony didn’t answer right away. He wasn’t sure how.
Because there were nights when it did feel like that, when he woke up with a phantom weight on his chest, when he remembered cave walls and sand in his throat, when he thought about how close he’d been to dying.
But there were other nights, too.
Nights like this, where Steve was looking at him with nothing but quiet understanding. Where Steve had his hand over Tony’s chest like he wasn’t afraid of what was underneath.
Tony exhaled, his fingers twitching where they rested over Steve’s. “I used to,” he admitted. “Not always. But sometimes.” He swallowed. “I think it just took a while to realize that it really was my second chance.”
Steve’s fingers curled against his ribs, gentle but firm. “Only you,” he murmured.
Tony huffed a quiet, breathless laugh.
Steve’s hand slid up then, moving from the arc reactor to cup the side of Tony’s face instead. His thumb brushed over Tony’s cheek, warm and steady. “I’m happy you realised it and that you’re still here,” he said, soft but certain. “I’m really damn glad you are.”
Tony felt something in his chest go tight, not in a bad way, just in a way that meant he was probably going to think about this moment for a long time.
He smirked, because that was easier than dealing with whatever emotion was trying to settle in his ribs. “You just like me for my genius and my good looks.”
Steve huffed, shaking his head, but his smile was fond. “I like you because you’re you,” he corrected, fingers threading into Tony’s hair, tilting his chin up just enough. “The genius, the good looks, the heart—every part of you.”
Tony didn’t have a response for that. Not one that wouldn’t sound like deflection, anyway, and for once, he didn’t want to deflect.
So instead, he let himself lean up into Steve’s touch, closing the distance between them and pressing their mouths together.
Steve kissed him slow, patient, like they had all the time in the world. And maybe, just maybe, they did.