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Dean stared at the small metal device in Cas’ hand where Cas knelt on the bed beside him.
“Alpha?” he asked, voice uncertain, hands gripping the sheets under his naked body.
“You know we’ve talked about this before,” Cas said, those blue eyes fixing him in a intense stare. “Now that I claimed you, I want to implement a few things. One of which is that I don't want you getting tempted to play with your little cock. Omegas don’t need the distraction.”
He smiled, but there was something hard in his eyes that told Dean there was no argument here. Instead, Dean silently looked back down to the metal cage that lay on Cas’ outstretched palm. It was less of a cage, and more of a round metal cap that would compress Dean’s cock back into his body until barely an inch was left. There was a bit of tubing that connected to an opening at the center of the cage, going inwards and through the ring that the metal cap was attached to with a small lock.
Dean had a sinking feeling of where that tube would go.
“You’ll behave for me, won’t you?” Cas asked, eyes fixed onto Dean’s.
Dean swallowed thickly, eyes flicking between the cage and his alphas eyes. “Yes, Alpha,” he murmured, and made himself spread his legs a little wider to show Cas that he’d be good. He felt so exposed, laying complete bare before Cas, who was still fully dressed.
“Good,” was all Cas said, before moving between Dean’s legs, and started to take the individual pieces of the cage apart so he could put it on Dean.
First, he fed Dean’s cock and balls through the ring, one after another. It was tight, tight enough that it took quite a bit of fiddling and pushing until Cas managed to press both of Dean’s balls through the metal. Dean bit his lip to keep quiet as the ring settled around the base of his junk.
He winced at the tight fit, the metal pressing into his skin a little. If he got hard like this, it would hurt. A lot.
When Cas reached for the actual cage, Dean whimpered a little, he couldn’t help himself. He watched as Cas spread some lube along the tube, before he lined it up to the slit at the tip of Dean’s dick.
“Now this might be a little uncomfortable at first,” Cas murmured as he started pushing the tip of the tube in. “But you’ll get used to it eventually.”
Dean shuddered at the feeling of the tube sliding into his cock, stretching his urethra in a feeling completely foreign to him. He’d never had anything up that hole, nor had he ever wanted to try. But he made himself stay quiet and still as Cas kept pushing it in, wanting to prove that he could be a good omega for Cas, until the metal cage pressed against the head of his cock and the tube settled into place inside him.
Dean stared wide-eyed at how much space was between the cage and the ring at the base of his dick. He wasn’t very big to begin with, his small omega cock barely more than three inches when he was soft. But the thought of all of that being forced into the tiny metal cap that was the cage made him shudder.
“Alpha...” he breathed when Cas started to press the cage down towards the ring.
Cas ignored him and kept pushing and pressing, kept forcing his cock smaller and smaller, kept forcing it to fit into the tiny space of the cage.
“Alpha, it hurts,” Dean whimpered, trying to keep his hips still the way he knew his alpha expected him to. And it really did hurt. Cas just clamped a hand around his hip to hold him still while he kept pressing the cage down with the other.
Dean kept whimpering as he watched the cage slowly creep closer to the ring.
When Cas was finally able to push the cage into the locking mechanism of the ring, Dean’s dick throbbed and ached. He barely heard the small clicking noise over the rushing in his ears as the lock snapped shut, but then Cas finally let go of him and leaned back, key held in one hand.
Dean stared down between his legs. His balls already looked red and angry where they were squeezed behind the cage. His small cock was completely hidden from sight, instead the small metal cap of the cock cage pressed against his swollen balls, keeping him small. Making it unable to get any pleasure from his cock, or even just touch himself. At the top of the cage was the opening to the tube that would allow Dean to still be able to pee.
A deep ache pulsed between his legs, the pain not letting off even when Cas was done.
“There, much better.” Cas purred, happily looking down at Dean’s locked up cock. “Small and out of sight.”
Dean whined a little, trying to get used to the intense pressure of the cage and the uncomfortable feeling of the tube inside his urethra. He squirmed in place, hips twitching as though his body was trying to escape the discomfort.
“Dean, behave,” Cas said, a stern look on his face. “You knew this would happen when you agreed to mate with me.”
Dean bit down on his lip to suppressed his next whimper, and nodded shakily. “Yes, Alpha. I’m sorry.” He forced himself to lie still.
“It’s alright. That’s why I wanted to lock you up, so you would learn. You’ve been allowed access to that little cock of yours way too long. Most omegas are locked up as soon as they present.”
Dean flushed in shame. He knew his father had allowed him much more freedom than most omegas were afforded after presenting. He’d never thought of it as a bad thing until he’d met his alpha. But he’s known Cas came from a more traditional family and would expect certain things of him if they mated.
Dean watched as Cas reached out to the bedside table and retrieved what looked like pliers. Cas was still holding the key to Dean’s cage and before Dean could even process what was happening, he’d wrapped the pliers around the metal and snapped the key clean in half. When he was done, Cas held the two pieces out to Dean.
Dean stared at them as the reality of what that meant settled in.
“Alpha...” he said, voice sounding desperate. “What...?”
“I told you you’d be in permanent chastity,” Cas said, voice growing cold. “You had the choice between this and castration. You chose the cage.”
Dean could feel tears burning as he stared up at his alpha. “But- Alpha, what about my heats?”
“What about your heats?” Cas smirked down at him. “When you’re in heat, I’ll be here to take care of you. You don’t need that little thing there. All you need is your alphas cock in your hole, like a good little omega. That cage is not coming off, Dean. It will stay on.”
At that, the tears spilled over, running hotly down Dean’s face. He brought up both hands to hide his face from his alpha as he tried, and failed, to clamp down on his sobs. A moment later, he felt Cas settling in on the bed beside him and pull him into his arms.
“Shhh, it’s alright. I know it’s hurts, and your heats will be hard, but I promise you, you’ll get used to it.” Dean shook in his alpha's arms, pressing his face into the crook of Cas' neck to hide his tears they both knew were running down his face. “You want to be perfect for me, don’t you?” Cas asked gently.
Dean nodded, taking a ragged breath. “Yes, alpha,” he hickuped, pressing himself closer to his alpha.
“There you go. This way, you are perfect for me.”
Dean nodded again, fisting his hands into his alpha’s crisp shirt. His cock throbbed between his legs, an unescapable ache. He didn’t know how he would get used to this feeling, but this is what his alpha wanted. And now that they were mated, there was nothing Dean could do about it. He knew his alpha had every right to do this.
For a while, the only sounds in the room were Dean’s small sniffling noises and Cas’ soothing words while he rubbed a hand over Dean’s naked back. Eventually, he managed to stop crying and just let his alpha hold him.
They stayed like that for a long time.
After a while, when Cas was sure Dean was done crying, he slowly ran the hand on his back down, over his spine, and hips, until he reached Dean’s ass.
Dean shuddered when he felt his alphas fingers circle the base of the plug nestled between his cheeks and slowly began working it out of his hole. For a while he just lazily played with it, pulling and pushing it in and out of Dean, before finally letting it slide out with a wet noise.
Dropping Dean’s plug on the bed, Cas went back to dip two fingers between his cheeks and rub over Dean’s wet entrance. It didn’t take long before the scent of slick filled their bedroom. Dean became aware of his alpha's hard bulge pressing against his hip.
Slowly, Cas pressed his fingers into the wet heat of Dean’s hole, pushing in to the second knuckled. Dean moaned when his alpha started fingering him, pressing in even deeper until he found Dean’s prostrate.
“Alpha!” Dean keened when Cas started rubbing over his prostrate and shocks of pleasure zapped through him. He felt his small cock painfully twitching against his cage, the blood that was rushing down there having nowhere to go. It hurt.
The pain and pleasure started to mix, leaving Dean in a haze of confusing sensations, unable to do anything but grip his alpha’s shirt tighter. Cas kept rubbing his prostrate, adding a third finger when his hole was loose enough.
Dean moaned and shuddered through the onslaught of overwhelming feelings, writhing in his alpha’s arms, but Cas held him tightly against his chest, not letting him squirm away.
Dean felt his release building and building, could feel his body racing towards that edge. When he fell over it, and his orgasm ripped through him, Dean was sobbing against his alpha. He felt his cum dribbling out of the hole at the tip of his cage, his cock desperately pressing against the hard and unyielding metal as he spilled himself against his alpha, staining his clothing.
Cas kept pumping his fingers into his hole through his orgasm, and way beyond it until Dean was twitching and whimpering from how oversensitive he was, begging for his alpha to stop.
Finally, mercifully, Cas withdrew his fingers and he rolled them over until Dean was on his back underneath him, Cas’ massive form pressing him down into the mattress. Cas reached between their body’s to free his hard cock from to confines of his trousers. Without a word, he lined himself up and pushed into Dean.
Cas groaned, Dean gasped and fought for breath, at the feeling of Dean’s tight heat stretching and gripping around Cas’ considerable size.
What followed was a fast and hard fuck, Cas bottoming out each time he thrust into Dean’s body. He fucked him until his breathing became fast and raged, his hips stuttering in their rhythm. He pushed into Dean a few more times before he buried himself to the hilt and spilled himself deep inside Dean, his knot growing and tying them together.
God, Dean felt so full, the weight of his alpha pressing him down into the mattress until he could barely breathe when Cas collapsed on top of him. There was pressure inside him where Cas’ knot split him open, and pressure between his legs from the cage, and pressure on top of him from Cas’ dead weight.
As both of them panted, trying to regain their breaths, Dean felt a few more tears escape his eyes at the realization that this was permanent. That he would never be able to touch his own cock again, never be able to come from his cock. That he would spend his each and every one of his heats in pain from now on.
Eventually, his alphas knot went down enough for Cas to slip out of him. He made quick work of scooping his cum up and pressing it back into Dean before plugging him back up, trapping his cum inside of Dean. Then, he gathered Dean into his arms and carried him to the bathroom where he place Dean on the counter long enough to pull his clothes off. Once he was naked, he picked Dean back up and stepped under the shower.
Cas cleaned them both, running gentle hands down Dean’s body and massaging shampoo into his hair. When he cleaned between Dean’s cheeks, he teased the plug with nimble fingers, before bringing the soap to the front and tenderly cleaning around Dean’s cage.
Dean let his alpha touch him, and clean him, and take care of him. Let his alpha fondle his swollen balls and caged cock with a hungry clint in his eyes, even though the touches hurt.
That night, it took Dean a very long time to fall asleep in his alphas arms, unable to ignore the throbbing between his legs. He would get used to it, he told himself. Prayed. He was doing it for his alpha, the man he loved, after all.