Credit to Duckiedeer in writing "The Masochism Tango" on AO3
and credit to De Bergerac on twitter/X for their beautiful 18+ fanart/comics
When Alastor awoke, it was to the sounds of chains: rattling and clinking.
Fully coming to, he first noticed that he was actually and truly suspended from off of the floor. His arms and legs were bound expertly behind him in a hog-tied fashion; chains intricately and artfully woven so that they held him securely in this position while distributing his weight with masterful efficiency. He had been raised a good five feet off the ground: his movements upon waking causing him to - slightly but freely - swing and sway.
The next thing he noticed was that something was placed against his face; he could see the soft outline of a black leather strap wrapping just above the bridge of his nose, a cage of wire effectively encasing his mouth. He could feel soft but firm leather straps originating from the muzzle; wrapping around his head, past his antlers and his ears, fastened securely in place. Muzzled; much like someone's disobedient dog...
"You are awake, I see." Lucifer, parting the shadows, appeared before Alastor - fully naked. Alastor briefly noted then that he, himself was bare-chested but otherwise still dressed in his dress pants.
"You blacked-out there...I told you this stuff could be potent." Lucifer told him, referring to the dried Ichor that was coating his bare skin; cascading down his chest and splashed against his neck, arms and face. The wound on his shoulder had very nearly finished knitting itself closed.
"I told you what would happen if you couldn't control that rather nasty bite of yours." Lucifer was saying, approaching Alastor and hooking one clawed finger through a wire of the basket muzzle. "And, well...promises."
Alastor growled; ears laid flat against the straps that wrapped around each base.
"A shame you had to go and pass out on me like that, really." Lucifer used the finger that held the muzzle to force Alastor's head into a sharp tilt, so that he could look him straight into one eye. "I thought things were just getting good..."
He released the wire muzzle: Alastor's growl building into a snarl.
"Tell me, Alastor, do you wish to continue our little...game?"
"Yes...sire." Alastor replied; his radio filtered voice crackling throughout and into the surrounding shadows.
"A rather honest answer." Lucifer noted. "You are learning..."
The chains holding Alastor began to move. The long chain that held his legs bound and bent into his back loosened and let go just as the chains supporting his upper body shifted and pulled him into a standing position; his upper body still tightly restrained.
"And, are you ready to begin, again?" Lucifer asked him.
"Yes...your grace."
"Heh...I should have muzzled you a long time ago." Lucifer told him as chains slid to the floor, releasing Alastor's bound hands and arms from behind his back.
"And, do you plan to behave...?" Lucifer asked him, smiling wickedly up at the radio demon.
"Of course...your-" Alastor did not get the chance to finish before the chain encircling the ring to his large brimstone shackle around his neck jerked forward; pulling him down. He was brought down to his knees, shackles encasing his wrists and securing themselves tightly to the floor. The chain that kept him leashed had tightened and shortened itself so much that he could not raise himself from the kneeling position he had been forced into.
"Fuck!" Alastor snarled, realizing the very vulnerable position he had been placed in.
"Now, there is the matter of your attire. You are much too covered for what I have in mind..." Lucifer told him, approaching him from behind.
"I could just shred these fine dress pants to pieces but then... I'd like to think I'm not that much of a monster." He said, leaning down.
Alastor sent a viscous kick out at Lucifer. The angel caught the outstretched leg with ease: holding Alastor in this new position.
"Ah..." Alastor tried to jerk his leg back but Lucifer's hold was firm. Alastor's ears swept back: apprehension building now that he had been reduced to kneeling on just one knee...
Keeping Alastor's leg raised; Lucifer stepped between both limbs, pressing himself into Alastor's backside. Alastor could feel the King's erection, pressing into him through the fabric of his only remaining clothing.
Lucifer leaned himself further into him; the pressure of his member pressing just there...
Alastor shuddered; pleasurable sensations rolling like waves down his back at the contact.
Firmly keeping his erect cock pressed against Alastor's covered entrance, Lucifer leaned over still further. Alastor felt the scarred skin of his lower back make contact with the bare skin of Lucifer's chest as the angel laid across Alastor, forcing him to bare more weight onto arms and hands. Using his free hand, Lucifer dragged a clawed finger delicately across Alastor's lower stomach, sending a burning, tension directly to the demon's groin. Sliding his hand into the waistband, Lucifer pulled Alastor's fully erect penis out, shifting the clothing down further.
Leaving the quivering cock - for the moment - Lucifer continued to drag his clawed hand across the waistband of Alastor's dress pants, returning to his back and pulling them down to Alastor's knees. Lucifer paused, considering the now fully exposed long and fluffy deer tail that wiggled and wagged with jerking, nervous movements.
"You know...my own tail," Lucifer continued to pull the dress pants off of Alastor's limbs, adjusting and re-adjusting the angle of Alastor's legs to get the job done. "Well, I've found it's really rather quite sensitive..." Shifting form slightly, his black, forked devil's tail slid and wound itself across Alastor's bare leg, climbing up the thigh, over his pelvis and coiling itself tightly around the base of Alastor's still-wagging deer tail.
"Tsk..." Alastor flinched, pulses of sensation tickling the base of his spine. Alastor's antlers, already slowly branching out and climbing higher before suddenly spread wider; rising sharply. His eyes burning green.
Keeping Alastor's one leg raised off the ground, Lucifer leaned himself back into him. With no fabric to dull the contact now; Alastor felt the tip of Lucifer's engorged member pressing against him, threatening penetration.
"Why, Alastor...I do believe I've misread you." Lucifer told him, reaching around and taking him fully in-hand now.
"Hell's great radio demon wants to be mounted...I think you might actually be dripping at the thought..." Lucifer noted, pre-cum oozing between his fingers and falling to the floor.
"Hhhnnngggh" Alastor groaned, trying to steady himself. "You talk too much." He managed.
"Careful, pet." Lucifer purred. "Or do you want me broadcasting your screams of pleasure all throughout Hell when we're done here. Imagine it… The fear in those sinners who hear them...not knowing just who could make you come undone so completely..."
Alastor answered with a moan, unable to articulate anymore.
Setting Alastor's leg down now, Lucifer leant over as he firmly gripped Alastor's oozing penis; milking what he could into his hand without setting him over the edge.
Letting go of the throbbing muscle, he pulled his pre-cum filled hand back, spitting into his palm. Leaning back slightly, he smeared the mixture along his own more-than-ready length; his own pre-cum adding to the lubricant.
Lucifer moved his hands to each side of Alastor's hips. In response: Alastor sunk himself further to the ground, hair raised like hackles; spreading his knees wider; his deer tail standing, frizzed and jerking with Lucifer's tail still wrapped and squeezing it at the base. The chain leashing Alastor to the floor and the chains restraining his wrists tightened; keeping him securely there for good measure.
Slowly, purposefully, Lucifer penetrated. Alastor groaned into the floor; claws gouging into the surface as he jerked against his restraints. Lucifer gasped at the tightness; pausing so that both of them might adjust before either of them came apart at the seams. Alastor was panting; his claws making an awful screeching; the end of his wire muzzle scraping across the slick floor. Lucifer held them there; his own claws digging sharply into Alastor's hips, drawing blood. Alastor's tension began to ease; his body responding and accepting this new development. Feeling the stretch and softening of muscle; Lucifer began moving – sliding his cock – in and then nearly out; in a slow and tortuous pace.
Pressed to the floor; Alastor shook with a whining, whimpering moaning.
Lucifer bit his own lip; golden blood seeping to his chin.
"You're going-" He huffed. "to have to stop that if-ah….-if…ahhhh, fuck…"
Lucifer's hips jerked and Alastor pressed himself back into him; desperate for more. His deer tail was absolutely wagging at the stimulation he was feeling; his cock so fully hard and enlarged now that it was curved and pressing into his own belly. He could feel his own juices; touching him and spreading against himself.
Alastor's tightness was sending Lucifer quickly over the edge. Feeling himself stiffen; about to unleash his load; Lucifer gave two hard and final deep thrusts into Alastor. Timing it perfectly, he pulled out; spraying cum all across the radio demon's back. His final thrust had sent Alastor over as well; the radio demon coming undone beneath his King…
Alastor jerked awake; afraid by what he might find.
The room was pitch black; then a bedside light came on.
Alastor shifted awkwardly in the bed.
"What? No problem this time?" Lucifer asked him.
"No, I don't think- Hm. Well…maybe a different kind of a problem."
"Oh, for the love of-" Lucifer slid out of bed, pulling a pillow and a throw blanket with him.
"Where are you going?" Alastor asked him.
"The couch." Lucifer growled. "You can come get me when you are done changing my sheets."