Archive of Our Own

It begins the way so many of their conversations do: sideways.

Holmes is pacing the length of the sitting room, hands clasped behind his back, lecturing with the casual confidence of a man who assumes he is correct and enjoys the process of proving it.

“Interrogation,” he says, “is merely persuasion with fewer courtesies. You identify leverage, you apply pressure, you observe the response. Adjust accordingly.”

Moriarty, seated near the fire with a ledger half-forgotten on his knee, hums in acknowledgment. “You make it sound bloodless.”

Holmes slows, turning just enough to regard him. “It is, when compared to the usual alternatives. People imagine persuasion must hurt to be effective. That suffering is proof of success.”

He resumes pacing, voice light, almost conversational. “In truth, pain is merely the crudest instrument. Fear, deprivation, force… inelegant, wasteful, and often counterproductive.”

A pause. Then, with quiet emphasis, “Most people are far more malleable when they are comfortable. When they are flattered. When they are enjoying themselves.”

His glance flicks back to Moriarty, sharp and knowing. “Pleasure,” Holmes adds mildly, “is astonishingly persuasive, if one knows how to apply it.”

Moriarty looks up.

Holmes continues, utterly unperturbed. “Fear produces resistance. Pain narrows the mind. But pleasure,” He smiles faintly, as though at a private joke. “Pleasure opens people. Makes them generous. Honest.”

Moriarty considers him over the rim of his teacup. “You’re suggesting it as an interrogation tactic.”

“I’m suggesting it’s an interrogation tactic,” Holmes mentions lightly, “that I happen to be very good at.”

That, finally, earns a pause.

Moriarty sets the cup down with care. “Do go on.”

Holmes’s mouth quirks. He enjoys this now; Moriarty can hear it in his voice. “It requires attentiveness. Curiosity. An ability to notice what someone wants before they’re brave enough to articulate it. Most people aren’t nearly as subtle as they imagine.”

Moriarty exhales a quiet laugh. “You’re right about that. Women, especially, would find a detective… well-equipped. Someone trained to notice the unsaid.”

Holmes waves a dismissive hand. “I’ve no interest in women at all.”

The words land cleanly. Too cleanly.

Moriarty does not move. For the briefest instant, the room feels sharper, as though a lens has been adjusted.

“Oh,” he says.

Holmes stops pacing. He turns fully now, eyes alight with that dangerous, pleased attentiveness Moriarty recognizes from a hundred other moments: when a pattern has revealed itself, when the game has become interesting.

Moriarty tilts his head, curiosity overtaking propriety without hesitation. “Then as a man,” he says mildly, unperturbed, “you’d presumably have an advantage. Familiarity. A shared map.”

Holmes regards him, openly amused. “Presumably.”

“So,” Moriarty continues, testing the idea with academic calm, “you’d know what another man wants.”

Holmes steps closer. Not deliberately - at least not overtly - but the distance between them shortens all the same.

“Want,” Holmes says, softly, “is rarely a mystery. People announce it constantly. With posture. With breath. With what they linger over, and what they pretend not to notice.”

Moriarty feels it then: the subtle shift, the way the conversation has turned its face toward him.

“And if they don’t announce it?” he asks.

Holmes smiles. “Then they’re lying to themselves. Which is even easier to work with.”

Their eyes hold.

Moriarty’s pulse ticks once, twice - an unwelcome but undeniable reaction. He finds himself smiling in return, slow and deliberate.

“How very dangerous of you,” he murmurs.

Holmes’s gaze does not waver. “Only if one mistakes observation for manipulation.”

“And do you?”

Holmes leans in just enough for the question to feel personal. “That,” he says, “depends entirely on consent.”

For a long moment, neither of them speaks.

Then Moriarty clears his throat, gathers his ledger as though it has been the point all along, and stands.

“A fascinating theory,” he says lightly. “Perhaps one best left untested.”

Holmes watches him with undisguised delight.

“As you wish,” he replies. “Though you should know… I’m very good at experiments too.”

Moriarty decides to take the bait.

Holmes is being far too deliberate about it. The closeness, the emphasis, the unapologetic confidence. It has the unmistakable shape of a challenge, and Moriarty has never been good at ignoring those. Certainly Holmes cannot be suggesting  - seriously - that they sleep together for the sake of science.

And yet.

Moriarty rises and steps into Holmes’s space, closing the distance with calm intent rather than heat. The movement alone is an answer.

“And what,” he asks quietly, “is it you’re hoping to learn?”

Holmes’s smile sharpens, pleased rather than startled. “Isn’t that obvious? Where the line truly lies. What someone will give when asked nothing directly at all.”

Moriarty studies him at close range now: the quickened breath, the barely contained energy. “You could obtain any information you wished from me simply by asking.”

Holmes tilts his head. “Information, yes. But not proof.”

“Proof of what?”

Holmes’s gaze flicks to Moriarty’s mouth and back again, just once. “Of how much is volunteered when one believes they are in control.”

Moriarty exhales a soft laugh. “Sex seems an extravagant methodology. Simple seduction would suffice.”

“Would it?” Holmes murmurs.

Moriarty answers by raising a hand and placing it flat against Holmes’s chest. He feels the warmth there, the unmistakable thrum beneath his palm. Slowly, deliberately, he lets his hand slide down to Holmes’s waist and pulls him in just enough to make the intent unmistakable.

“As an example,” Moriarty says lightly.

He leans in, close enough that his breath brushes Holmes’s ear, and speaks low, measured, intimate.

“You’re already leaning forward,” he murmurs. “Your pulse jumped when I touched you. You’re not wondering if this would work, only how far I’ll take it before you lose the thread entirely.”

Then he leans back, just out of reach, watching.

Holmes blinks. Once.

His cheeks are faintly flushed now, eyes bright and unmistakably delighted: giddy, even, in that rare way that means he has been caught mid-thought and enjoyed it.

“Well,” Holmes says, a little breathless and entirely amused, “that was extremely competent.”

Moriarty arches a brow. “Only competent?”

“If you’re offering lessons,” Holmes continues, stepping closer again, “I’d be very happy to teach you the remainder.”

Moriarty’s smile turns dangerous. “And what makes you think I’m not already quite good at both?”

Holmes’s grin widens, unabashed and hungry with curiosity. “There’s always room for improvement.”

For a moment, the space between them hums with possibility - unsaid, untested, exquisitely balanced.

Then Moriarty steps away first, satisfied.

“Perhaps,” he says, “another experiment for another evening.”

Holmes watches him go, eyes alight, already replaying the data.

***

Moriarty does not sleep immediately.

He lies awake instead, staring at the ceiling with the faintly incredulous expression of a man who has just realized that he has been thoroughly propositioned.

Not crudely. Not even particularly directly. But undeniably.

Holmes had not flirted in the ordinary sense. There had been no fumbling, no attempt at charm. Only that sharp, unapologetic curiosity turned, very deliberately, on Moriarty himself. As though the notion had occurred to Holmes not as a desire first, but as a conclusion.

Which makes Moriarty huff a quiet laugh into the darkness.

Of course Holmes would frame it that way. Of course he would look at William Moriarty - his equal, his mirror, his most persistent intellectual opponent - and think: Yes. That would be fascinating.

Was it truly about sex? Or was it about the experiment of it? About what would happen if two minds so well-matched, so accustomed to prediction and counter-prediction, were to turn those skills inward instead of outward?

Moriarty rolls onto his side, amused now rather than unsettled.

Holmes would not be imagining fumbling discovery or tentative exploration. Holmes would be imagining inevitability. Anticipation layered upon anticipation. Two men who live by reading others, stripped of the pleasure of surprise because there would be none - only recognition.

You would know what I want before I do.

And I would know when you do.

Moriarty exhales through his nose, the sound halfway to a laugh.

That, he realizes, would absolutely thrill Holmes.

Not because it would be easy, but because it would be perfectly calibrated. No wasted motion. No pretense. A closed circuit of attention and response, tightening until there was nothing left to solve.

The thought has, he notes with dry amusement, never once crossed his mind before this evening.

And yet now that it has…

Moriarty smiles faintly into his pillow.

Yes. He can see it. He can see exactly how Holmes would have arrived there, bright-eyed and flushed with discovery, convinced he had uncovered a remarkable natural phenomenon.

William Moriarty, sexual inevitability.

Ridiculous.

He closes his eyes at last, still smiling, and thinks - not for the first time - that Holmes may be the most dangerous eccentric he has ever encountered.

Not because Holmes wants him.

But because Holmes has already decided they would be extraordinary together. And that, Moriarty knows, is the sort of conclusion Holmes never reaches lightly.

It is not commitment Holmes is offering. Nor romance. Hardly even desire, in the usual sense. It is a hypothesis. An experiment proposed with reckless confidence and bright-eyed interest.

And William Moriarty has never been immune to those.

***

The next time they meet, Moriarty waits until the conversation drifts – inevitably - back toward method and motive, toward Holmes’s preferred territory of abstractions dressed as truths.

“You know,” Moriarty says lightly, as though continuing an earlier thread, “I’ve been thinking about your… proposed experiment.”

Holmes stills at once.

“Have you?” His voice is careful now, curious rather than triumphant.

Moriarty folds his hands behind his back, posture relaxed, almost casual. “You were quite confident in your conclusions. I wondered whether you’d be disappointed to discover a flaw in your assumptions.”

Holmes turns fully toward him, eyes bright. “You’re suggesting peer review.”

“I’m suggesting,” Moriarty replies, stepping closer - not enough to touch, but enough to reclaim that charged proximity, “that I might be interested.”

Holmes inhales. He does not hide it.

“Not as a commitment,” Moriarty adds smoothly. “Nor even as indulgence. Merely… observation. I find I’m curious to see how you react when the variables behave as expected.”

A smile spreads across Holmes’s face, slow, delighted, unmistakably giddy in a way Moriarty has seen only when Holmes is on the verge of a discovery.

“You’re offering yourself as data,” Holmes says softly.

Moriarty’s eyes gleam. “Hardly. I’m offering you the chance to be surprised.”

For a long moment, Holmes only watches him… assessing, recalibrating, clearly recalculating everything he thought he knew.

Then he laughs, low and pleased.

“Oh,” Holmes says. “This is already proving to be an excellent experiment.”

Moriarty allows himself a small, private smile.

He does not give him time to overthink it.

“Then let us start simply,” he says, voice even, composed. “Right now.”

Holmes’s expression changes. Not shock, not disbelief, but something sharper: alertness. As though the board has been reset mid-game and the opening move has been made without warning.

“Simple,” Holmes repeats, tasting the word.

Moriarty steps closer. Deliberately. No flourish, no seduction layered on yet - just presence. He closes the remaining distance until Holmes has no choice but to register him fully: the warmth, the intent, the unmistakable now of it.

“No hypotheses,” Moriarty continues quietly. “No conclusions. Just observation.”

Holmes’s breath hitches. He does not retreat.

“And what,” Holmes asks, voice low and delighted, “do you propose we observe?”

Moriarty lifts a hand, slowly enough that Holmes can track every inch of the movement, and rests his fingers at the hollow of Holmes’s throat. Not gripping. Not claiming. Simply there.

“This,” Moriarty murmurs. “Your reaction when you’re not in control of the pacing.”

Holmes’s pupils blow wide. A smile curves at his mouth, unguarded and frankly thrilled.

“Extraordinary,” he says. “You’ve already altered the conditions.”

Moriarty leans in just enough that their foreheads nearly touch. Close enough for breath to mingle. Close enough that the moment tightens without breaking.

“Data,” Moriarty says softly, “must be gathered carefully.”

He withdraws his hand just as slowly and steps back a single pace, leaving the space between them charged and unresolved.

Holmes exhales, laughing under his breath, flushed and bright-eyed and unmistakably pleased.

“Yes,” he says. “Simple was an inspired choice.”

Moriarty turns away, calm restored, satisfaction flickering briefly across his face.

Holmes’s smile turns inquisitive rather than amused.

“And is that,” he asks mildly, eyes searching Moriarty’s face, “the limit of your experimentation this evening?”

Moriarty opens his mouth to answer…

… and Holmes closes the distance instead.

It happens far more quickly than Moriarty expects. No warning, no flourish. Just Holmes’s hand at his jaw, decisive and warm, and then Holmes’s mouth on his.

Moriarty freezes.

This was meant to be a tease. A controlled provocation. A data point, not an escalation.

Except Holmes’s mouth is… damnably warm. Soft in a way that contradicts everything else about him, and precise in a way that does not. There is no fumbling, no uncertainty. Holmes kisses him like a man who has already observed this moment a hundred times and is now confirming a hypothesis.

Moriarty’s breath stutters. His balance shifts - not physically, but internally, something carefully held slipping just enough to matter.

Holmes adjusts instantly. Tilts his head. Deepens the kiss by a fraction, not forceful but assured, reading Moriarty’s hesitation and answering it with something coaxing rather than demanding.

Oh.

Moriarty had not anticipated this.

Not the confidence. Not the way Holmes seems to invite response rather than take it. Not the way the kiss feels: measured, attentive, infuriatingly skilled, as though Holmes is listening with his mouth.

Moriarty finds himself leaning in before he has consciously decided to.

When Holmes finally pulls back, it is only a few inches but it feels like a withdrawal of gravity.

Moriarty swallows.

“That,” he manages, voice steadier than his knees, “escalated more quickly than I intended.”

Holmes looks delighted. Genuinely, unguardedly delighted. A faint flush colors his cheekbones, eyes bright with satisfaction.

“I did warn you,” he says lightly, “that I was very good at this.”

Moriarty exhales a quiet, incredulous laugh. “I may,” he admits, “have underestimated your skill.” He glances down, then back up, and clears his throat with dignity that fools absolutely no one.

“I think,” he adds, “we should sit down.”

Holmes’s gaze flicks, keen and perceptive, to Moriarty’s posture and the subtle tremor he has not entirely mastered.

“Of course,” Holmes says, offering an arm with exaggerated politeness. “For observational purposes.”

Moriarty concedes with grace.

For the remainder of the evening he allows Holmes his victory - the faint, infuriating satisfaction in Holmes’s smile, the way Holmes keeps glancing at him as though replaying the kiss frame by frame. Moriarty even lets Holmes think it was decisive.

As they part, Moriarty murmurs mildly, “Enjoy it while you can.”

Holmes arches a brow. “Is that a warning?”

“A courtesy,” Moriarty replies.

Holmes laughs, delighted and unconcerned.

***

The next time they meet, it is in public.

The new Scotland Yard library gleams with polished wood and glass, all clean lines and quiet authority. The Moriarty family name is etched discreetly into a donor plaque - tasteful, unavoidable. Moriarty moves through the opening reception with practiced ease, greeting officials, accepting thanks, playing the impeccable benefactor.

Holmes watches him from across the room, already alert.

Moriarty waits for precisely the right moment - when Holmes is half-absorbed in conversation, his guard relaxed because the setting feels safe - when he appears at Holmes’s side as though summoned by thought alone.

“Have you seen the upper gallery?” Moriarty asks softly. “The acoustics are remarkable.”

Holmes turns, smiles. “You’re recruiting me as a critic now?”

“Always,” Moriarty says and leans in, just enough to speak beside Holmes’s ear rather than to his face.

“The trick,” he murmurs, voice low and even, “is not to touch at first.”

Holmes stills.

Moriarty does not look at him. He gestures toward the architecture, the shelves, the carved railings, as though continuing a harmless commentary. His words, however, are carefully chosen.

“You describe,” he continues, “exactly what you would do - slowly, vividly - until the other person’s imagination does the work for you. Anticipation is far more destabilizing than action.”

Holmes’s breath changes subtly. Moriarty notices.

They begin to walk. Moriarty keeps the pace unhurried, his presence constant but never crowding. He speaks near Holmes’s ear, painting scenes that never quite cross into indecency but linger there, suggestive enough that Holmes has to supply the missing details himself.

“You’re very responsive to cadence,” Moriarty observes quietly. “To precision. To being understood without explanation.”

Holmes swallows.

Moriarty lets his hand brush Holmes’s sleeve - as if by accident, as if unaware - and then withdraws it immediately.

“See?” Moriarty says gently. “No pressure at all.”

By the time they reach the gallery, Holmes is vibrating with attention, pupils blown wide, hands clenched loosely at his sides. He is shaking, not with restraint exactly, but with want sharpened by admiration.

Moriarty finally turns to face him.

Holmes looks wrecked. And delighted.

“My god,” Holmes breathes, half-laughing, half-bewildered. “You’re… really quite exceptional at this.”

Moriarty smiles, slow and satisfied, the picture of calm control.

“I did tell you,” he says softly. “You won the first round. I merely wished to correct your data.”

Holmes laughs outright now, bright-eyed and undone and utterly thrilled.

“Yes,” he says fervently. “Yes, you’ve made your point.”

Moriarty inclines his head, magnanimous.

The experiment, it seems, is proceeding exactly as planned.

***

A few evenings later, Holmes summons him under the pretext of work: an analysis of donor security, an architectural curiosity, something plausibly dull and genuinely clever. Moriarty arrives composed, impeccably armored, still faintly pleased with himself.

Holmes has arranged the table so they must stand shoulder to shoulder.

No candles. No theatrics. Just papers, diagrams, and Holmes’s maddeningly calm presence. He does not touch Moriarty. He does not flirt. He listens.

Moriarty explains a theory. Holmes follows it without effort, steps precisely where Moriarty intends, finishes the proof with a neat addition that makes Moriarty’s breath catch despite himself.

“Well done,” Holmes murmurs - not praise, exactly, but acknowledgment. As though they are aligned instruments rather than adversaries.

They work like that for several minutes, the air growing quieter, tighter. Moriarty becomes aware, against his will, that Holmes has not once looked away.

“You’re enjoying this,” Holmes says suddenly, eyes still on the page.

Moriarty stills. “Am I?”

“Yes,” Holmes replies easily. “Not because you’re winning. Because you’re being met.”

Moriarty’s pulse betrays him. Holmes notices.

“You seduce with anticipation,” Holmes continues, voice low, conversational. “With implication. You make people feel chosen. Rare talent.”

He finally turns his head. Their shoulders brush.

“I imagine,” Holmes adds, gently, “you’re seldom on the receiving end.”

Moriarty’s smile falters. Only a fraction, but Holmes catches it.

Holmes reaches out then. Just once. Two fingers to Moriarty’s wrist, thumb resting precisely over the pulse that has gone traitor-fast. He holds it long enough to confirm, then lets go.

“I am,” Holmes says quietly, “very good at noticing.”

Moriarty swallows. The room feels suddenly too small, the victory at the library recontextualized, sharpened.

Holmes steps back, giving him space and cruelly courteous.

“Shall we continue?” Holmes asks, entirely composed.

Moriarty nods, though his equilibrium has shifted. He understands now what Holmes has done. No fantasy. No flourish. Just recognition laid bare, timed perfectly.

When they part later, Holmes offers him a small, satisfied smile.

“Consider us even,” Holmes says.

Moriarty laughs softly as he leaves, unsettled and exhilarated in equal measure.

“Oh,” he thinks. “You are dangerous.”

***

Several days pass. Long enough for Holmes to be satisfied with his equilibrium-restoring maneuver. Long enough for him to believe – incorrectly - that Moriarty is recalibrating.

Then, at a small private gathering hosted by a mutual acquaintance, Moriarty arrives late.

Holmes notices immediately.

Moriarty is immaculate, as always, but something in him has changed. Not softened. Refined. A quietness that does not seek permission from the room, but assumes it. He moves with unhurried assurance, greets others with practiced ease, offers Holmes nothing more than a brief, civil nod, and then proceeds to spend the next quarter-hour behaving as though Holmes does not exist.

Holmes finds, to his irritation, that his attention keeps circling back.

When Moriarty finally approaches, it is with a question so ordinary it borders on insolence.

“Mr. Holmes,” he says, evenly. “You were examining the west wing earlier. Did you find the ventilation as inadequate as I did?”

Holmes answers easily. “Adequate enough.”

Moriarty inclines his head, considering. He steps closer, not seeking intimacy, merely claiming space already earned. When he speaks again, his voice is low, calibrated precisely for Holmes.

“I’ve been thinking about what you said,” he murmurs. “About being met.”

Holmes stills. Entirely.

Moriarty does not look at him. He surveys the room with the detached interest of a man accustomed to mastery. “You were right,” he continues, as though stating a settled conclusion. “It is… disarming.”

Holmes allows himself the faintest smile. “I’m pleased you found it instructive.”

“Oh, I did.” Moriarty turns then and meets Holmes’s gaze without concession. His expression is calm, assured. Unimpressed. “Which is why I decided not to offer it so freely.”

Holmes’s brow lifts.

Moriarty takes a single step back.

He does not touch Holmes. He does not lower his voice further. He does not invite pursuit.

Instead, Moriarty says, “You’re enjoying this. You prefer to be the sharper mind. The observer. The one who reads the room while others perform within it.” A pause, measured, intentional. “But just now, you are waiting.”

Holmes feels it then. Not surprise, but want. Want for Moriarty’s undivided attention. A brief, electric awareness of absence. Of attention withheld not out of caution, but out of choice.

Moriarty’s smile is minimal. Controlled. “I thought it only fair you noticed.”

And then he disengages.

Not abruptly. Elegantly. He reenters the room as though nothing of consequence has occurred, as though he has not just shifted the balance with surgical precision.

Holmes remains where he is, pulse betraying him, mind already recalibrating.

Well played.

When Moriarty finally glances back from across the room, Holmes is smiling, openly now. Bright. Unmistakably pleased.

Because that was not seduction.

That was strategy.

And Holmes, acutely aware of the space Moriarty has left unfilled, realizes that he intends to earn the return of that attention.

He follows Moriarty - not closely enough to be obvious, not distantly enough to be ignored - until the flow of the gathering deposits them near a tall window, half-curtained, the city lights reflecting faintly in the glass. Still public. Still safe. Still charged.

“Well played,” Holmes says lightly, as though commenting on a chess problem. “You mirrored me beautifully.”

Moriarty inclines his head. “I learned from an excellent teacher.”

Holmes smiles and then does something Moriarty does not anticipate.

He tells the truth.

“You’re right,” Holmes says softly. “I am waiting.”

Moriarty’s brows knit, just barely. Holmes continues, voice low, precise, pitched only for him.

“And you are enjoying that I am.”

The air shifts. Holmes has not raised his voice. He has not touched him. But the effect is immediate and unmistakable.

“You removed my advantage,” Holmes goes on, almost conversational. “So I’ll borrow one of yours.”

He steps closer, not into Moriarty’s space, but into the narrow margin where retreat would be noticed.

“You like control,” Holmes says, not accusing. “Not dominance. The ability to choose when things begin and when they end.”

Moriarty’s breath slows, carefully regulated. “Observation,” he says. “Or speculation?”

Holmes’s eyes gleam. “Confirmation.” He glances away deliberately and toward the room, the people, the plausible deniability. then leans in just enough to speak beside Moriarty’s ear.

“I won’t touch you,” Holmes murmurs. “Not tonight.”

Moriarty’s pulse jumps. Holmes feels it, even without contact.

“But,” Holmes adds, gently, “you’ll think about whether I could. And when. And why I’m choosing not to.”

Moriarty exhales. quiet, controlled, but not quite steady.

Holmes straightens, smiles pleasantly, and walks away.

***

They are alone at last.

Moriarty registers it with a tightening rather than relief. Holmes is capable of moods; that has never been in question. Fascinations flare, burn, and are sometimes abandoned the instant they cease to yield novelty. Moriarty has watched Holmes discard problems, people, even entire obsessions without ceremony.

Moriarty cannot believe Holmes would simply abandon him.

Which makes the last three weeks intolerable. Holmes has not withdrawn entirely - he has remained present, attentive, precise - but the familiar pressure of interest is gone. If this is a tactic, Moriarty cannot yet see its objective, only its effect.

And its effect is… wrong.

He tells himself it must be strategy. Holmes does nothing without reason. This must be a recalibration, a feint, a pause designed to provoke a response. Moriarty understands those moves. He has deployed them himself.

What he does not understand is his own reaction.

The unease has grown steadily, disproportionate and intrusive. An unsteady feeling beneath the ribs. A faint nausea he cannot explain away. His thoughts keep circling the same impossible premise: that Holmes’s attention might truly be gone, and that the absence feels not merely irritating, but physical. As though something essential has been mislaid.

Moriarty dislikes the implication intensely.

Not by design, but by Holmes’s quiet talent for arranging circumstances so that inevitability feels like coincidence. A closed door. A pause in conversation. The house settled into evening.

Moriarty is aware of it immediately. The silence presses differently when Holmes is present.

Holmes does nothing. That is the problem.

He stands close enough that Moriarty can feel him: heat, presence, the faint scent of smoke and clean wool. He does not even look at him at first. He turns a page. Adjusts a paperweight. Occupies his hands with something precise and unnecessary.

Moriarty’s attention snags on it like a misfiring mechanism.

Holmes speaks eventually, calmly, about nothing in particular. His voice is steady, unhurried. But he positions himself just so: always within reach, always withdrawing by a fraction when Moriarty shifts closer without meaning to. Moriarty realizes, with a flicker of irritation, that Holmes is pacing him. Not physically. Internally.

Holmes glances up at last. Their eyes meet. He holds the gaze, warm, intent, and then looks away again, as though satisfied.

Something twists unpleasantly in Moriarty’s chest.

He wants…

No. That’s not right.

The realization lands so sharply it steals his breath. Moriarty’s fingers curl at his side, reflexive. He nearly reaches out before stopping himself, pulse thundering, mind scrambling to regain order. This is unfamiliar territory. He does not crave touch. He does not reach.

“What,” Moriarty asks quietly, almost to himself, “are you doing?”

Holmes turns then, fully. Concern flickers there, keen and immediate.

“I was about to ask you the same,” Holmes says gently.

Moriarty frowns, unsettled now rather than intrigued. “I don’t understand this. I don’t… react this way.”

“I know,” Holmes replies. He steps closer, slowly, giving Moriarty every chance to object, and stops just short of contact. “That’s why,” Holmes continues, voice low and deliberate, “I stopped paying attention to you the way I usually do.”

Moriarty stiffens. “Stopped what?”

“Watching you,” Holmes says quietly. “Tracking you. Noticing every adjustment you make before you realize you’ve made it… You’re accustomed to it.”

Moriarty looks away, jaw tight, irrefutably embarrassed. He refuses to give that admission breath.

Holmes does not press, but he does not retreat either. “It’s upset you.”

“That’s not - ” Moriarty starts sharply, then reins it in. “You’re misreading me.”

Holmes studies him, eyes intent. “No. Upset isn’t the right word.”

Moriarty’s pulse stutters. “Holmes.”

“It frightened you,” Holmes says gently.

The word lands like a blow. Moriarty’s stomach turns, sharp and sudden, the nausea flaring hot enough to make him sway.

“Stop,” Moriarty says at once. “I don’t care for this experiment. I want it ended.”

Holmes exhales, slow and regretful. “I don’t think we can stop it now.”

Moriarty’s breath comes shallow. He hates that this is affecting him, hates that it has reached his body. That it has slipped past intellect and into something visceral and humiliating. He needs control. He needs to move.

“Enough,” Moriarty says abruptly, and then closes the distance in a single decisive step.

This time there is no elegance to it. No slow calibration. He seizes Holmes’s attention with sheer force of intent, mouth claiming Holmes’s in a kiss that is all pressure and precision, too fast, too skilled, deliberately overwhelming. His hands are everywhere at once - shoulders, waist, spine - guiding, demanding, turning Holmes’s body responsive before his mind can catch up.

Holmes gasps against his mouth, startled, and then very clearly aroused, breath hitching, hands curling reflexively before he stops himself. His eyes are bright, unfocused for half a second, body reacting faster than thought.

Moriarty pulls back just enough to speak, breath unsteady.

“There,” he says. “That’s what you wanted. Let’s finish it.”

Holmes exhales slowly, visibly forcing himself back into control. When he speaks, his voice is calm but tight.

“No,” he says. “You can’t end an experiment by rushing it.”

Moriarty’s jaw clenches. “Then I’m ending it altogether.”

Holmes meets his gaze steadily. “You don’t want to.”

“That’s not - ”

“You’re scared,” Holmes says quietly. Not accusing. Observing. “And you’ve mistaken fear for a desire to stop.”

Moriarty’s breath shakes. “I don’t do this. I don’t lose footing.”

“I know,” Holmes replies. “That’s why this frightened you.”

Silence stretches between them, heavy and charged. Holmes does not advance. Does not retreat. He gives Moriarty space.

“You upset both of us just now,” Holmes continues gently. “You provoked me just to prove you could. And yourself because you were trying to reclaim ground.”

Moriarty looks away, hands trembling faintly with unspent energy. “Then what,” he demands softly, “do I have to do to reset?”

Holmes answers without hesitation.

“Slow down,” he says. “And choose.”

Moriarty turns back, startled.

“You don’t need to seduce me,” Holmes goes on. “Or stop this. You need to decide whether you want control back or clarity.”

Moriarty swallows. “And if I choose clarity?”

Holmes’s voice softens further. “Then you ask for what you want instead of forcing it to end.”

Moriarty stands very still for a long moment.

“…And if what I want,” he says carefully, “is for this not to feel like I’m losing myself?”

Holmes nods once. “Then we pause. Fully. No games.”

He steps back another pace, deliberately breaking the tension.

“You reset by grounding,” Holmes says. “Not escalating.”

Moriarty closes his eyes briefly, breathing until the tremor eases.

When he opens them again, the fear has not vanished, but it has settled.

“Very well,” he says quietly. “Pause.”

Holmes inclines his head. “Good. We’ll continue,” he says evenly, “when you are ready.”

Moriarty nods, grateful and irritated all at once.

***

The next time they meet, everything is… normal.

Painfully so.

They discuss work. Logistics. A minor irritation with Scotland Yard’s filing system. Holmes is brilliant, distracted, entirely himself. Moriarty matches him beat for beat, composed, precise, untouchable.

And every second of it is torture.

When Holmes finally takes his leave, Moriarty keeps his posture immaculate until the door clicks shut. Only then does he exhale, hard, and rake both hands through his hair, pacing once, sharply.

He wanted Holmes’s hand on him. On his arm. His shoulder. Anywhere. Nowhere specific, just touch. The wanting itself is what upsets him most. He does not do this. He does not ache for contact like an unanswered question.

This experiment is intolerable.

“Damn it,” Moriarty mutters.

The door opens again.

Holmes steps back inside, blinking in mild surprise. “I forgot my scarf.”

Moriarty freezes.

Holmes retrieves it from the back of the chair, wraps it around his hand once absently. and turns just in time for Moriarty to seize the front of his coat and pull him in.

The kiss is nothing like before.

It isn’t aggressive. It isn’t strategic. It is frustrated and hot, Moriarty’s mouth claiming Holmes’s with intent sharpened by restraint, by days of not touching, by wanting that has nowhere sensible to go. Holmes gasps softly, hands lifting instinctively before stopping short, letting Moriarty set the terms.

For a heartbeat, the world narrows to heat and breath and the unmistakable truth of it.

Then Moriarty breaks it.

He pushes Holmes back through the door, firm and final, and slams it shut.

Locks it.

Then - furious with himself - kicks it once, hard.

“Fuck,” he breathes.

On the other side of the door, Holmes stands very still, heart racing, mouth tingling, eyes bright with something dangerously close to awe.

***

Holmes invites him over with no pretense at all. Just a quiet note, precise as ever: Come by this evening.

Moriarty arrives prepared, composed, alert and ready in the way one is ready for a confrontation rather than an intimacy. Holmes notes it instantly. The way Moriarty’s shoulders sit a fraction too high. The way his irritation hums just beneath the surface, carefully leashed.

They speak first of nothing important.

Holmes pours tea. Moriarty comments on the weather. Everything is normal, exquisitely so, and Holmes spends the first half hour thinking not about whether to continue the experiment, but how.

He has plans, of course. Hypotheses. Gentle progressions. Ways to resume that preserve Moriarty’s sense of agency while still advancing -

And then he stops.

This was meant to be the seduction of William James Moriarty: elegant, reciprocal, intellectually devastating. A game of anticipation and restraint. Instead, it had become something else entirely.

How not to push too far. How not to fracture something delicate and dangerous. How to keep Moriarty from bolting, or worse, from turning inward.

Holmes looks up.

Moriarty is flushed, cheeks faintly colored, jaw tight. He is doing an admirable job of concealing his agitation. Anyone else would miss it entirely.

Holmes does not.

The clipped responses. The careful stillness. The irritation not at Holmes, but at himself.

Holmes feels something shift in his chest.

He sets his cup down quietly and crosses the room without comment. He stops in front of Moriarty, waits just long enough to be certain, and then lifts a hand to Moriarty’s jaw.

Moriarty inhales sharply.

Holmes kisses him.

Not to provoke. Not to win. Just warm, steady contact, unrushed, grounding, unmistakably present. A kiss meant to say you’re safe here, not let’s see what happens.

Moriarty freezes, caught between instinct and resistance. His mouth answers even as his body holds itself rigid, every muscle locked in disciplined refusal. His mind scrambles for footing, cataloguing risks, rehearsing exits, searching for the cost that must surely follow.

Then Holmes’s hands come to him, firm, anchoring, unmistakably real. One at Moriarty’s jaw, the other steady at his back, holding without trapping, close without demand.

The fight drains out of Moriarty all at once.

The tension breaks; his breath slips, then shudders. A soft, helpless sound escapes him before he can stop it, the kind that belongs entirely to the body and not the mind. He melts into the kiss completely, shoulders slackening, fingers clutching at Holmes’s coat not to guide or control but simply to stay. His thoughts protest faintly, distant and ineffectual, while his body gives itself over to the relief of losing control with someone he trusts.

Holmes doesn’t exploit the surrender. He holds him there steady and patient until Moriarty can breathe again.

When Holmes pulls back, it is slow, deliberate.

Moriarty looks at him, steadier but wrecked, eyes dark and unfocused, control visibly stripped away.

Holmes rests his forehead briefly against Moriarty’s, voice low and certain.

“This isn’t about the experiment anymore,” he says.

“…What?” Moriarty says, quiet and sharp all at once, as though the word itself might defend him.

Holmes doesn’t move away. He keeps his hand where it is, steady at Moriarty’s jaw, thumb resting just beneath his ear, anchoring, not claiming.

“I mean,” Holmes says calmly, “that this stopped being about curiosity the moment you stopped enjoying it.”

Moriarty exhales a brittle laugh. “I don’t need protecting.”

“I know,” Holmes replies at once. “That isn’t what this is.”

He searches Moriarty’s face, eyes soft but unyielding. “You don’t need protection. You need permission.”

Moriarty frowns. “Permission for what?”

“To stop treating pleasure like a transaction,” Holmes says. “To stop calculating what it costs you. To stop thinking about how to beat me.”

“You’re always negotiating,” Holmes continues quietly. “Always paying in advance. Control for safety. Excellence for worth. Even desire becomes something you think you must earn or return.”

Moriarty opens his mouth, but nothing escapes.

Holmes doesn’t ask for anything in return.

He keeps the attention one-sided on purpose: murmured words meant only to soothe, touches meant only to steady, kisses placed where Moriarty reacts most instinctively. Never crossing a line, but skating it with infuriating skill. Moriarty follows without thinking, leaning, sighing, making small, honest noises he has never allowed himself before.

Holmes feels the truth settle with quiet certainty.

This – this - is what William Moriarty needed.

Not seduction. Not conquest. Not brilliance matched for brilliance.

But the radical permission to receive pleasure without paying for it.

Holmes rests his forehead against Moriarty’s when he finally stills him, voice low, certain, almost reverent.

Moriarty closes his eyes, undone, breath uneven but calm.

Holmes draws him closer, careful, protective, awed.

He hasn’t won a game. He’s won something infinitely rarer.

The privilege of watching William James Moriarty experience pleasure… simply because he’s allowed.