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Summary:

Viktor reads Jayce's notes carefully. Jayce's heart flutters. Viktor's eyes flit up to Jayce's with a look that Jayce can't quite place.
"You want me to…probe you?" Viktor's face is so carefully neutral, but the hint of disbelief in his voice betrays him. Jayce's nerves twist.
"If it's too much—"
"No!" Viktor interrupts. Jayce raises an eyebrow at him, and watches as a slow blush creeps into Viktor's cheeks. He clears his throat. "Do not misunderstand me. It's not too much, it's…" Viktor flips to the front again, studying the diagram. "It's quite robust." There's a twinkle in his eye.
Jayce feels his face grow hot to match. He reaches to grab the notebook. "Never mind."
Viktor pulls his hand back, keeping it out of reach. "Jayce."
Jayce freezes. Jayce recognizes that tone. Viktor's eyes seem to scan over him now in hunger.
"You would like this?"
Jayce nods.
"I would like to experiment on you then." Viktor moves closer, crowding into him. "I will analyze every movement, ever shiver and moan." Viktor smiles. "Is that alright?"
"Viktor," Jayce nearly groans. "Yes. Please."
...
Viktor, upon request, experiments on Jayce.

Notes:

Written for Day 6 of Sub Bottom Jayce Week! Special thanks to Lydia for collaborating with me on this fic!! Please go support their incredible art and give them a like and follow!!

Words for Jayce's genitals: Hole, cunt, dick, cock

(See the end of the work for more notes.)

Work Text:

Jayce never felt more exposed than he did right now, handing Viktor what was basically his own personal blueprints for his deepest fantasy with a very red face.

He knows Viktor won't judge—he's indulged the shorter man in a multitude of unique and often gross kinks. But this one feels different. For one, it's the first request Jayce has made. It requires a bit of prep and a narrative. And two, it's definitely a fantasy that he would not have if it weren't for Viktor.

He's spent a lot of time with Viktor in the lab. It's only natural to see him in his goggles and safety gloves and feel a little pent up. At least, that's what he tells himself.

Viktor reads Jayce's notes carefully. It's an elaborate design, built for extensive use and maximum pleasure. Jayce himself calibrated the piston to move slowly, attached to a wheel so that the angle would fluctuate with each thrust.

He squirms as Viktor raises a single eyebrow and shifts. Jayce's heart flutters. He waits.

And waits.

Finally, Viktor reaches the end of the last page. His eyes flit up to Jayce's with a look that Jayce can't quite place.

It's over, Jayce thinks. Viktor's going to laugh in his face. Or worse, leave him.

"You want me to…probe you?" Viktor's face is so carefully neutral, but the hint of disbelief in his voice betrays him. Jayce's nerves twist.

"If it's too much—"

"No!" Viktor interrupts. Jayce raises an eyebrow at him, and watches as a slow blush creeps into Viktor's cheeks. He clears his throat. "Do not misunderstand me. It's not too much, it's…" Viktor flips to the front again, studying the diagram. "It's quite robust." There's a twinkle in his eye.

Jayce feels his face grow hot to match. He reaches to grab the notebook. "Never mind."

Viktor pulls his hand back, keeping it out of reach. "Jayce."

Jayce freezes. Jayce recognizes that tone. His body obeys before his brain can catch up. A pulse of warmth floods into his abdomen. Viktor's eyes seem to scan over him now in hunger.

"You would like this?"

Jayce nods.

"I would like to experiment on you then." Viktor moves closer, crowding into him. "I will analyze every movement, ever shiver and moan." Viktor smiles. "Is that alright?"

"Viktor," Jayce nearly groans. "Yes. Please."

Viktor retreats. He sits back down at the table and nods. "Very well." He clicks his tongue. "We should get started on it then."

It takes them only three days. The entire time, Jayce's anticipation threatens to unravel him. Viktor, already in character, treats the prototype like any other experiment. Once, he switches mid-thought to another actual invention for the Council, and Jayce barely notices, already leaking in his underwear as he stares, lost in his imagination. He worries briefly if watching Viktor experiment will ever not be sexy to him again. He finds that he doesn't really care.

On the night of the scene, when Jayce arrives to the lab (after leaving for an hour like Viktor requested), he sees Viktor has already set everything up. The contraption sits on Viktor's desk, alongside another recent invention.

"Ah, yes, our volunteer." Jayce notices Viktor for the first time, sitting on a stool. His goggles are pushed up on his forehead, clearly already in character. "Are you ready for your examination?"

Jayce smiles. "Viktor, what—"

"I need to thoroughly examine you to ensure you are ready." Viktor states as if it's obvious. "Lock the door behind you."

Jayce does what he's told.

"Good." The praise is nothing, but Jayce already feels it flow over him like a warm balm. "Now strip and stand on the marker on the floor."

"What marker—" Then Jayce glances down and scoffs—there is in fact, a small x on the floor made of tape. Viktor really is getting into it. It is incredibly endearing, and equals parts affection and arousal flood his system. Viktor is doing this for him.

Jayce steps on the marker. He glances up to see Viktor waiting patiently.

Jayce strips. He makes no attempt to tease—if Viktor is treating this so seriously, then he will do the same. The lab air is cold, and he feels a shiver of goosebumps run through him. He shimmies out of his pants, and pauses, looking up at Viktor. Viktor nods, and so he takes his underwear off too. He flushes a little at the damp patch in them.

Finally, he's completely naked.

Viktor hums in appreciation. "Beautiful specimen."

Jayce can't help reaction he feels to that statement. He shivers.

Viktor steps closer, examining him like a organism on a microscope. When touches Jayce's shoulder, Jayce can't hide the gasp.

"Strong trapezius and deltoids," Viktor notes. His hand slides down towards his chest. He runs a hand over Jayce's nipple and Jayce lets out a soft sound, feeling it perk up instantly from the light touch. He doesn't have complete sensation there, but parts of it still send a jolt through his spine.

"Sensitive pectorals," Viktor hums. His eyes are focused like they would be during a test phase of Hextech. Jayce wonders, dully, if Viktor is going to narrate everything that happens tonight. Jayce's pulse quickens at the thought.

Viktor's fingers travel lower, over the faint scarring under his pecs, tracing his smooth abdominal. Jayce's muscles contract at the touch. Everything feels so much sharper, the anticipation burning through him to his core. Viktor's hand reaches his navel, and dances directly above his pubic mound. Jayce trembles.

"Very good." Viktor's voice is low, and Jayce swallows a large amount of spit accumulating in his mouth. "You are a perfect match for this." Viktor steps back, letting his hand drop.

"Please, get on the table, hands and knees, legs facing the desk."

Jayce blinks himself out a stupor. Viktor waits, nodding.

Jayce approaches the "table" (his anvil, draped with a blanket and covered in some form of makeshift padding). He does what he's told. It's clear that Viktor expects him to hold this position for awhile, because the cushioning is very soft on his knees. The shape of the padding on the front lets him comfortably rest on his elbows.

He settles into the position, face flushing at how exposed he is. Both of his holes are on full display. He's grateful that he tidied up down there earlier, even though he can feel his cunt drip slightly at the new position.

Behind him, he can hear Viktor clicking and strapping something into place. Another thing about this position—Jayce cannot see what Viktor is doing behind him. He twists, trying to see, but strong, cold metal hand pushes on his on back.

Jayce stills. He can hear the whirring of the machine. He's very familiar with the design of the Hexclaw and its three pronged hand. Viktor has put it on.

Viktor tuts at him. "I didn't say to move. I, eh, should probably tie you down. For safety," he adds.

Jayce bites back a smile. It's a little bit of a clunky delivery, but he's also unbearably horny at the thought. He nods.

Viktor doesn't move. "A verbal confirmation from the subject is preferred."

"Yes," Jayce says, heart fluttering at Viktor's own care for him. "For safety."

Viktor finally steps into view, and Jayce sees him plainly. The Hexclaw is strapped on his back, rotating idly. In his hands are soft ribbon-like rope. He carefully loops Jayce's wrists into them and ties them down. It takes a few minutes, but finally Viktor steps back. Jayce attempts to move his wrist, and finds no give in the rope.

Viktor nods. "Good. Now you will stay still for the duration of the experiment." He moves out of Jayce's view. Jayce can hear him getting something else ready—the snap of a glove, the pop of a cap, and the whir of the claw. He wants to look so bad, but he stays still as he was told.

He nearly jumps as a gloved hand touches his left ass cheek.

"Apologies," Viktor says with little remorse. "Beginning preparation."

A cold, wet finger touches his asshole and Jayce gasps. He clenches involuntarily.

"Relax," Viktor purrs, and Jayce takes a deep breath. Viktor's finger gently pets the entrance.

"Good. Subject responds well to instructions." Viktor hums, slowly pushing in and out barely an inch. Jayce sinks into the sensation. It's not uncomfortable, but it's not entirely stimulating. Just enough to for his other, more needy hole to throb.

By the time Viktor is pressing further in, Jayce has relaxed entirely. His legs already feel shaky, and his dick begs for some form of contact. He whines softly, shocked at how wrecked he already sounds.

Viktor does not react, continuing the slow and steady motion. Jayce clenches around him.

"Mmm," Viktor exhales, a little breathless. He coughs. "Subject is taking the first digit well. Applying second digit."

Viktor presses another finger in and Jayce full on moans. It's loud, and he feels his face heat up.

"Very good," Viktor says. He pumps his fingers in and out. There's a soft clicking sound, and Jayce feels cold lube run down his ass cheeks. The lab fills with vulgar wet sounds.

Viktor scissors his fingers, and Jayce cries at the stretch. He needs some other form of stimulation, anything, and he squirms. The ropes hold him fast.

"Nearly there," Viktor responds. He moves once, twice, and then retreats.

Jayce misses the stretch immediately. Then something larger presses in.

Jayce hisses. It's far bigger than Viktor's fingers. Viktor must know he's struggling to take it, but he makes no move to slow down. He presses it in slowly.

Jayce can't breathe. He chokes out a cry as the largest part of the toy pushes through before finally fitting snugly against the curve of his ass.

"Stimulation apparatus in place," Viktor says with a undertone of want that only Jayce would pick up on. "Beginning stimulation."

Jayce hears a button click, and groans as the toy begins to vibrate. It's much more intense than he thought, and he designed the damn thing. He attempts to make a mental note of the hexgems' power in relation to vibration, but the thought vanishes as Viktor clicks another button.

The toy pulses. It's just enough not to overwhelm while leaving Jayce begging for more. He lets out a high pitched noise. "Viktor…"

Viktor doesn't respond, as least not directly. "Subject remains coherent and thoroughly aroused." Jayce hears the sound of pencil scribbling against paper. Is Viktor taking notes? A vision of Viktor, tongue pressed out of his mouth, goggles over his eyes, writing furiously as Jayce lies prostrated in front of him sends him into a weird cacophony of adoration and arousal. He loves him so much. The pleasure builds more and he feels himself drip rather obscenely onto the blanket below him.

Jayce and Viktor having sex in the lab. Jayce is face down ass up on his anvil, his wrists are tied together and his face is half hidden in his forearms, tears leaking out of his closed eyes. Viktor is standing behind him, fully dressed wearing goggles, with the hexclaw on his back and a remote in his hand, his other hand is resting on Jayce's ass. The hexclaw light is beaming down and bathing Jayce in blue light.

Viktor lets him sit like that for what seems like hours (five minutes). It's enough for him to get whiny, begging for something more. "Please."

Viktor jots something down. There's another sound behind him, a long noise as something heavier is shifted into position.

"Beginning secondary penetration," Viktor states. It's the only warning Jayce gets as something much bigger than the vibrator in his ass presses against his cunt.

Jayce is so wet that Viktor almost slips it in with little resistance. It's large, possibly bigger than anything they've played with before, but Jayce specifically requested it, and he has no regrets. Viktor slowly presses it in.

"Probe in position," Viktor says with a thick voice. Jayce clenches around it. He feels so full, both holes plugged. The vibration pleasantly stirs against the "probe," gently massaging his g spot. Jayce moans so loudly he's sure all of Piltover can hear him.

Viktor presses a button, and the probe pushes steadily in and out of him, punching out Jayce's breath. Between that and the vibrations from the toy, arousal surrounds him like a warm blanket.

Viktor clicks another button and the probe quickens. Jayce whines. "V…Viktor…"

There's no response from behind him, only a few scribbles in the notebook. Viktor is ignoring him, treating him like he's an object eager to be probed. The thought only sends him further down into pleasure. Gradually, he sinks into the sensation. He head goes slack.

"Subject is docile and taking the stimulation well." Viktor narrates behind him, sounding far away. Jayce can only focus on the sensation of the probe, of feeling simultaneously so full and yet not enough, not enough.

He's not sure how long he stays like that, teetering on the edge, bones like jelly and thoroughly leaking onto the pillows underneath them. Time seems to stretch and stop altogether, and his head feels devoid of thoughts, peaceful. He's so close. He can feel his orgasm building inside of him, a rush begging to be let out. He needs to be touched. He whimpers softly. Every nerve on his body feels overwhelmed and warm.

Like a gift from the gods above, a gloved hand reaches up and gently circles around his swollen cock.

Jayce cries out. His vision goes white as he has the most intense orgasm of his life. The waves of pleasure only build as Viktor holds his fingers there, guiding him through it, and Jayce gasps as he lets go. He feels himself gush, and Viktor hums. "Very good."

Jayce finally stills. The probe still fucks into him at the same speed, and he wriggles at the overstimulation. Tears prick at the corners of his eyes. "Please…"

"Now testing subject overstimulation," Viktor says.

Jayce's heart skips a beat. It's too much, and he gasps, wriggling in his restraints. Tears prick at the corner of his eyes. "H-hah."

Viktor makes no movement, face neutral, eyes hidden behind the goggles. It's absolute torture. The vibrations of the toy mixed with the probe make him want to squirm out, but his body refuses to respond, too tired to even move. He can't breathe.

Then, blessedly, Jayce feels the overstimulation slowly melt away into another build up of pleasure. His mouth falls open, uncaring what noises spill out. He thinks it might be some form of begging. When he comes, it's weak, pulsing around the probe, while Viktor coaxes him through it. "Well done." Viktor continues to rub his swollen dick, and Jayce can't help the cries that come out of his mouth. He's full on sobbing now, big wet tears clouding his vision. He can't come again. He can't.

But Viktor doesn't stop. All of Jayce's nerve endings light up. He has one last, painful orgasm that builds up and quickly peters out.

Viktor moves his fingers away, and Jayce gasps with relief. There's a click, and the probe stills. Another click, and the toy in his ass stills.

Jayce's brain feels like mush. A trail of spit falls out of his mouth, and he sniffs. Every nerve feels cracked open and raw.

"Experiment successful," Viktor says, sounding out of breath. "Let's get you out of there."

Viktor slowly removes the toy and the probe from Jayce, leaving a good, aching emptiness that has Jayce humming softly. Viktor undoes his restraints, and with his help, Jayce carefully sits up. His legs are boneless, and Viktor guides him off the anvil, to the corner of his desk. A blanket is thrown around his body, and Jayce hugs it close.

After a few moments, Jayce sees Viktor in front of him. He gives him a dopey smile. "Hi."

"Hi." Viktor smiles back. His eyes are kind, almost worried. "Alright?"

"Yes. Did you…." Jayce eyes dart down to Viktor crotch, still fully clothed.

"Another time. This is about you." Viktor strokes his cheek. "I hope it wasn't too far."

"No! It was perfect."

Viktor doesn't look entirely sure. His hand shakes a little against him, and Jayce realizes that he's dropping. It's entirely normal. The rush of endorphins end and they're left with the strange reality of the situation. Jayce is well equipped to deal with his part.

He carefully brings Viktor in close and kisses him softly. Viktor hesitates—it breaks Jayce's heart a little to see him so soft and insecure. He wraps them both in the blanket, rubbing soothing circles into Viktor's bad leg, where he knows the thigh will ache.

They sit like this, holding each other, until Viktor's tension fades away. He slumps next to Jayce, exhausted.

"Better?" Jayce says.

"Mmm…" Viktor yawns. "I don't see you as an…experiment." Viktor mumbles it into his shoulder. Jayce's heart clenches. It's unbearably cute.

"I know that," he says gently. "Thank you. It was…exactly what I wanted." He kisses the top of Viktor's head. "Let's clean up and go home."

Lydia give me the alt text here too please

Notes:

tysm for reading, once again please go give Lydia a like and comment on their amazing art!!

Me too please...spare change mister... <3