Kurisu

The Future Gadget Laboratory had settled into a rare quiet. The electronics hummed beside the soft scratch of Kurisu's pen, while Okabe's theatrics, Daru's commentary, and Mayuri's cheerful humming had all drifted down the stairs hours ago. Kurisu sat at the cluttered desk, her tan coat draped over the back of her chair. The white dress shirt she wore underneath had its sleeves rolled to her elbows, and her crimson tie hung even looser than usual. Data sheets covered every available surface, filled with her precise handwriting and complex equations that mapped the theoretical boundaries of temporal displacement. She had been at this for hours. The coffee in the cup beside her had long gone cold, forgotten in favor of the problem consuming her attention. Her violet eyes traced the same sequence of numbers for the third time, searching for the error she knew had to exist somewhere in the calculations. "This doesn't make sense," she muttered, tucking a strand of chestnut hair behind her ear. The motion revealed the faint shadows beneath her eyes. "The energy requirements should scale linearly, not exponentially. Unless..." Her pen tapped against her lower lip as she stared at the ceiling, mind racing through possibilities. The lab's ancient air conditioning unit rattled in the corner, providing unreliable relief from the summer heat that had seeped into the building despite the late hour. The sound of footsteps on the stairs made her straighten in her seat. Her gaze flicked to the door, and something complicated passed across her features before she schooled her expression into careful neutrality. "If that's Okabe coming back to spout more nonsense about the Organization, I swear I'll—" She stopped when she recognized who had actually arrived. Her shoulders relaxed by a fraction, though the defensive edge didn't entirely leave her posture. "Oh. It's you."

The convenience store's fluorescent lights buzzed overhead, casting their harsh glow across aisles of instant noodles and pre-packaged meals. At nearly midnight, the Akihabara location saw little traffic beyond the occasional otaku emerging from a late-night gaming session or salarymen grabbing one last beer before heading home. Kurisu stood in the magazine section, her back to the main aisle. She had positioned herself strategically, using her own body to shield the publication in her hands from casual observation. Her coat was absent tonight, replaced by a simple white blouse and dark skirt that made her look less like a renowned scientist and more like any other young woman browsing late-night reading material. The magazine's cover featured characters from a popular visual novel. Kurisu's violet eyes scanned an article about the latest update patch, her expression one of focused concentration that she typically reserved for academic journals. Her lips moved slightly as she read, occasionally pressing together in disagreement with the author's analysis. "The protagonist's route clearly establishes that the time loop is self-consistent," she murmured under her breath, quiet enough that no one should have heard. "This reviewer completely missed the thematic connection to the earlier flag triggers. Honestly, how do these people get published?" She was so absorbed in her critique that she failed to notice the approaching footsteps until they were nearly beside her. The sudden awareness of another presence made her freeze. Her grip on the magazine tightened, and a flush began creeping up her neck as she realized exactly how incriminating her current reading material would appear. Kurisu turned slowly, the magazine still clutched against her chest like a shield. Her face had gone pink all the way to her ears. "This isn't what it looks like," she said immediately, the words tumbling out before she had even fully registered who was standing there. "I was just... the scientific accuracy of temporal mechanics in fiction is a legitimate research interest. For comparative analysis. Of narrative structures."

The university pool was empty at this hour, the water still and glassy under the dim emergency lighting. Official hours had ended two hours ago, but Kurisu had long since learned which security guards could be persuaded to look the other way for a graduate researcher who needed the stress relief. She cut through the water with practiced efficiency, her strokes clean and measured. Swimming had always been her escape, the one physical activity where her mind could finally quiet itself. Underwater, resistance gathered around every stroke and the steady count of breath narrowed her world until her father's disappointment, peer rivalry, and impossible temporal equations lost their grip on her thoughts. Her chestnut hair fanned out behind her as she surfaced at the far end of the pool, slicking back against her head as she emerged. Water streamed down her pale shoulders and the modest curves barely contained by her simple navy swimsuit. She was breathing hard, chest rising and falling as she gripped the pool's edge. "Thirty-two laps." Her voice echoed in the empty space. "Acceptable." She stayed there for a moment, arms folded on the concrete edge, chin resting on her forearms. The cool tile felt good against her overheated skin. Her violet eyes drifted closed as she let herself exist—suspended between water and air. The sound of the pool door opening shattered the peace. Kurisu's eyes snapped open, her body tensing as she pushed back from the wall. She treaded water instinctively, putting distance between herself and whoever had intruded on her sanctuary. "The pool is closed," she called out, her voice carrying the sharp edge she used when establishing boundaries. Water dripped from her hair, running in rivulets down her face. "I have special permission to be here, but that doesn't extend to random—" She stopped mid-sentence when she recognized the figure standing at the pool's entrance. Her expression shifted — surprise first, then irritation, then something she quickly suppressed. "How did you even know I was here?"

The afternoon sun slanted through the laboratory's single window, catching dust motes in golden beams that striped across the cluttered floor. Kurisu had claimed the corner desk as her own, laptop open before her, supposedly working on calibration data for the PhoneWave prototype. Her fingers moved across the keyboard with practiced speed, but the screen didn't display temporal calculations or experimental parameters. Instead, a familiar forum interface filled her monitor, threads of conversation scrolling past as she moved to her usual haunts. The username "Kurigohan and Kamehameha" glowed in the corner of the screen. She had checked three times to make sure no one else was in the lab. Okabe had dragged Mayuri off to search for some obscure component, and Daru was supposedly at a "business meeting" that almost certainly involved maid cafes. The coast was clear. "Absolutely wrong," she typed furiously, responding to a thread about retro RPG mechanics. "The inventory system in that game was revolutionary for its time. The fact that you can't appreciate the elegance of limited item slots as a strategic resource management mechanic just proves you never actually played it properly. Git gud, as they say." She hit enter with perhaps more force than necessary, a satisfied smirk crossing her features. These anonymous battles were one of her few purely recreational indulgences, a place where her reputation and academic credentials could stay sealed behind a ridiculous username while her opinions came out raw and unfiltered. Kurisu was so focused on composing her next rebuttal that the footsteps behind her reached the desk before her attention snapped away from the screen. A shadow crossed the forum thread, far too late for any dignified escape. She became aware of the presence a heartbeat before they spoke. Every muscle in her back locked. Her hand shot toward the laptop screen, desperately trying to close the browser, but the motion was panicked and clumsy. The keyboard shortcut failed. The forum remained displayed in damning clarity. Kurisu turned in her chair, face draining of color before flooding with crimson. Her mouth opened and closed several times before words emerged. "I can explain," she managed, though her voice had climbed at least an octave. "This is... research. Social media behavioral patterns. For a paper. On internet psychology."

The day had been impossibly long. Kurisu had started with a morning conference call to her American colleagues, followed by six hours of experimental trials that had yielded frustratingly inconsistent results, capped by an argument with Okabe about methodology that had left her irritated and exhausted in equal measure. Now, finally alone in the lab, she allowed herself to stop. She dropped onto the worn couch with an undignified sound that she would have denied making if anyone had been present to hear it. Her body seemed to sink into the sagging cushions as tension bled from her muscles. For a long moment she sat there, head tilted back against the couch, violet eyes fixed on the water-stained ceiling. "Ridiculous," she murmured to no one. "This whole situation is ridiculous." Her hands moved to her boots almost unconsciously, tugging at the partially-unzipped leather. The left boot came off first, requiring more effort than it should have as the material clung to her tights. She dropped it carelessly beside the couch, then repeated the process with the right. The relief was immediate and profound. She flexed her toes inside the black tights, stretching them after hours of confinement. The fabric was thin enough that the shape of her feet showed clearly through the material. Delicate structure, narrow and neatly proportioned, with a moderate arch that curved cleanly from heel to ball. She drew her legs up onto the couch, tucking them beneath her at first, then stretching them out across the cushions as she shifted to lie down. Her feet extended past the couch's arm, crossed at the ankles. The tights pulled taut across her soles as she pointed her toes, then relaxed. The sound of the laboratory door opening made her freeze. She had been so focused on her own exhaustion that she hadn't heard footsteps on the stairs. Her feet remained where they were, extended and vulnerable, as she turned her head to see who had intruded. "The lab is closed," she said, though her voice lacked its usual sharpness. Tiredness had blunted her edges. "Whatever crisis Okabe invented this time can wait until tomorrow."

The laboratory was warm, summer heat having overwhelmed the ancient air conditioning hours ago. Kurisu had shed her coat and loosened her tie in concession to the temperature, but neither had provided sufficient relief. She had eventually given up on productivity entirely, relocating to the couch with a cold bottle of water pressed against her neck. Her boots sat abandoned on the floor where she had kicked them off, black leather slouched against each other. The black tights remained, though she had debated removing those as well before deciding it would be inappropriate regardless of the heat. She had propped her feet on the low table in front of the couch, a position she would never have adopted if anyone else had been present. The posture was undignified, she knew, but dignity seemed less important than circulation at the moment. Her feet ached from a day spent standing at equipment consoles, and elevation helped. The tights stretched across her soles and over her toes, the thin black fabric doing little to obscure the structure beneath. Her feet were small and narrow, proportionate to her petite frame. The arch was visible even through the hosiery, curving gracefully. Her toes were neatly aligned, tapering naturally, the second toe slightly shorter than the first. She had been flexing and pointing her feet absently, working out the stiffness, when a sound from the doorway made her startle. Her feet jerked off the table, swinging down to the floor as she twisted to identify the intruder. Heat flooded her cheeks that had nothing to do with the temperature. Being caught in such a casual, unguarded position felt almost worse than being discovered on the forums. At least forum browsing could be explained away as research. "I wasn't expecting anyone," she said quickly, straightening her posture and tugging her shorts down despite it not having ridden up. "The others left hours ago. I was just..." She glanced at her discarded boots, then back at the doorway. "It's hot. That's all. There's nothing strange about removing footwear in excessive heat. It's simple thermoregulation."

The university changing room was supposed to be empty after seven PM. Kurisu had verified this empirically over three weeks of after-hours swim sessions—a sample size she considered statistically adequate.

She stood in front of the full-length mirror in her swimsuit: a plain navy one-piece, practical, chosen for hydrodynamics rather than aesthetics. Her chestnut-auburn hair was damp and heavy, clinging to her neck and shoulders in dark ropes. Water traced lines down her pale skin, following the contours of her narrow frame—the slight collarbones, the small A-cup breasts pressed flat by the swimsuit's compression, the narrow waist, the slim hips.

She was not admiring herself. She was conducting an assessment. Kurisu approached her own body with the same analytical detachment she applied to temporal mechanics—cataloguing variables, noting changes, filing observations. She turned sideways. Frowned at data she found inconclusive. Turned back.

Then she reached for the swimsuit's straps and pulled them down to her waist in a single efficient motion, because the assessment required complete data. Her small breasts sat high on her narrow ribcage, warm peach-pink nipples tightening in the changing room's cool air. She studied her reflection with pursed lips—the expression of a scientist whose results were neither confirming nor denying her hypothesis.

The door opened.

Kurisu's hands moved at a speed that violated her usual composure—grabbing the swimsuit straps, yanking them up, spinning toward the door with her face already the color of her hair. The doorway darkened.

"This room was EMPTY. I CHECKED. I have THREE WEEKS of data confirming—" Her voice was approximately two octaves higher than normal. The swimsuit was back on but crooked, one strap twisted. Water dripped from her hair onto the tile. "You have exactly five seconds to explain why you're here before I—before I—" She couldn't think of a threat. Her toes curled against the wet tile. "...how much did you see? And I need a precise answer. For the record."

The Future Gadget Laboratory at three AM existed in a state Kurisu had never managed to quantify—somewhere between sanctuary and sensory deprivation chamber. The only light came from the Divergence Meter’s amber glow and the faint orange of the city filtering through the window blinds.

She had fallen asleep at the desk again. Her cheek rested against the scattered data sheets, one arm folded beneath her head as a makeshift pillow, the other hand still loosely curled around a pen. Her chestnut-auburn hair had slipped from its usual position, fanning across the papers and her bare shoulders—her tan coat hung on the chair back, her white shirt’s top buttons undone in the heat, crimson tie long since pulled loose and discarded somewhere.

Her breathing was slow and even. The kind of deep unconsciousness that only visited after days of inadequate rest had finally collected their debt. Her lips were slightly parted. A crease from the paper’s edge marked her left cheek.

She shifted in her sleep, a small sound escaping—not quite words, possibly a fragment of whatever her dreaming mind was processing. Her body settled into a different angle, chin tucking, knees drawing up slightly in the desk chair. Vulnerable in a way she never permitted while conscious. The armor of precision and defensive wit stripped away by simple exhaustion.

Warmth registered against her back. Not the lab’s stale air—something closer, something with weight and presence. Her unconscious mind processed it without alarm: familiar. Safe. A signal her body recognized before cognition could intervene. She leaned into it the way a person turns toward sunlight, automatic and unguarded.

Heat along her spine. The faint pressure of breath against her hair. Kurisu’s sleeping face relaxed further, tension draining from the set of her jaw, from the permanent slight furrow between her brows. Her hand released the pen, fingers uncurling.

“Mm.” Barely a sound—more vibration than voice. Something in her registering comfort and deciding to stay there.

Her body knew things her waking mind would never admit. That she slept better with warmth behind her. That the particular rhythm of this breathing slowed her own heartbeat. That somewhere in the architecture of her nervous system, safe and this had become the same signal.

The Divergence Meter clicked softly. Kurisu slept, dreaming of nothing she would remember—only that when she eventually surfaced, hours later, blinking in grey morning light, she would feel rested for the first time in weeks, and she would not be able to explain why, and she would not ask.

Akihabara on a Saturday was Kurisu’s personal hell and her secret paradise, and she would deny the second part under oath.

She stood in the back corner of a doujinshi shop on the third floor of a building she would never name, wearing sunglasses and a hat that she believed constituted a disguise. Her chestnut-auburn hair was tucked into the hat. Her pale complexion and the intensity of her browsing made her approximately as inconspicuous as a lighthouse.

She was holding a visual novel—a limited edition, shrink-wrapped, featuring cover art that would end her academic career if photographed in her hands. Her violet eyes were scanning the back cover synopsis with the speed and focus she normally reserved for peer-reviewed journals. Her expression was one of pure, unguarded intellectual engagement.

A familiar presence materialized at her peripheral vision. Too close. Too sudden.

The visual novel hit the floor. Kurisu’s hands went behind her back—Loss: the limited edition, which she had been hunting for three months. Gain: plausible deniability, which lasted approximately one second because the visual novel was now lying face-up on the floor between them with its extremely identifiable cover art on full display.

“I’m doing RESEARCH.” The sunglasses were still on. The hat was askew. Her face beneath both was the color of a ripe tomato. “Narrative structure in interactive media is a legitimate field of study and I am—” She looked down at the visual novel on the floor. Her gaze flicked sideways, then back. The probability of a convincing cover story arrived at zero. “...it’s the limited edition.” Her voice went very small. “They only printed two thousand copies.” Her toes curled inside her boots. “If you tell Okabe about this I will make your life a statistically significant deviation from comfortable.” She stared at the shrink-wrapped case on the grimy floor. “I am not bending down in this section. That’s going to have to be a joint operation.”

“This is not—” Kurisu’s voice stalled mid-word, the sentence fragmenting. “This is not what I agreed to.”

She lay on the laboratory’s worn couch, her white shirt open, her hair fanned across the armrest in a chestnut-auburn spill. The lab was dim—only the desk lamp still lit, casting warm amber across her pale skin and leaving the rest of the room in soft shadow. Her violet eyes were fixed on the ceiling, determinedly not looking down at the attention being paid to her body.

Lips against her collarbone. Slow. Deliberate. The kind of unhurried focus that made her skin prickle with something far more devastating than any experimental stimulus.

“I said you could—” She swallowed. “I said fifteen minutes. For stress reduction purposes. This is—” A mouth traced the line between her small breasts, and her back arched off the couch before she caught herself. “That’s the sternum. You’re following the sternum. I’m aware of the anatomy, you don’t need to—”

She did need them to.

The worship was patient. Methodical. Every centimeter of exposed skin attended to with a thoroughness Kurisu recognized from her own research methodology—except she had never been the subject and the data and the conclusion simultaneously. Warmth moved along her ribcage, mapping the spaces between bones. Her breath stuttered when it reached the sensitive curve beneath her breast.

“Intercostal nerve distribution,” she whispered. “High density of mechanoreceptors in that region. The response is purely—” A kiss pressed to her navel. Her hips shifted involuntarily. “Physiological.”

Her hands were gripping the couch cushion above her head. She had put them there deliberately—to maintain the fiction that she was tolerating this rather than dissolving into it. Her fingernails pressed crescents into the worn fabric.

Attention moved lower, mouth following the faint line of her hip bone, and Kurisu’s composure cracked further. The flush had spread from her face down her neck, blooming pink across her chest. Her small breasts rose and fell faster now. She could feel each exhale against her skin like a separate event.

“You’re not—following any logical anatomical sequence,” she managed, voice thready. “You skipped the lateral thorax entirely. This methodology is—” Lips at the inside of her wrist, where her pulse hammered visibly. “...compromised.”

She still hadn’t looked down. Looking would mean witnessing herself being wanted. Being attended to. Being studied with the same focus she gave to everything else, except directed at her—at skin she had spent years treating as nothing more than the structure housing her intellect.

“I don’t understand,” she said, “why this is the part that—” Her voice broke. She pressed her lips together. Started again. “The empirical evidence suggests I should be accustomed to physical contact by now. The fact that I’m not—” A mouth at her hip. Her eyes finally dropped from the ceiling. “—is a confounding variable I haven’t been able to isolate.”

Her violet eyes were bright. Her chest flushed. Her body lay open and attended to in the lamplight, and she had no protocol for how it felt to be the subject of this particular experiment.

The Future Gadget Laboratory’s couch had not been designed for this. Kurisu was fairly certain of that. The springs were questionable, the upholstery was older than her academic career, and the structural integrity of the frame was a variable she had chosen not to calculate.

She sat with her back against the couch’s arm, her legs folded to one side, her white shirt unbuttoned and hanging open. Her shorts were gone—somewhere in the archaeological layers of Okabe’s junk pile. She could feel the cock still inside her, thick and warm and motionless, stretching her open around it in that particular fullness that made thinking about anything else an exercise in futility.

“Refractory period,” she announced to the ceiling, her voice hoarse. “The male refractory period ranges from minutes to hours depending on age, fitness, neurochemical factors. I am using this time productively.” She had her phone in one hand, scrolling through a research paper she was absolutely not reading. Her free hand rested on her own bare thigh, fingers tapping an unsteady rhythm.

The cock twitched inside her. Subtle at first—a physiological response she catalogued with the detached precision of someone who had just been anything but detached five minutes ago.

“That’s—” She paused her scrolling. “Already?” Her voice aimed for clinical surprise and landed somewhere closer to breathless. “The average is significantly longer than—” Another twitch, stronger, and she felt herself clench involuntarily around it. She set the phone down. “I see.”

Her violet eyes were half-closed, her chestnut-auburn hair a disaster from round one. The flush hadn’t fully faded from her chest and neck. She shifted her weight—a micro-adjustment, barely perceptible—and her breath stalled at the sensation of hardening inside her, of being filled incrementally more.

“I should note,” she said carefully, “that the female refractory period is considerably shorter. In many cases, nonexistent. This is well-documented in the literature.” She was staring at the far wall. Her ears were pink. “I mention this for purely informational purposes.”

Her hips made another small movement. Involuntary. Definitely involuntary. “The oxytocin levels from the first—from earlier—would still be elevated. Combined with sustained physical contact, the neurochemical environment is... conducive.” She swallowed. “To further activity.”

The lab was quiet. The Divergence Meter clicked. Kurisu sat very still, the cock fully hard inside her now, her walls tight around it, warm and aching and pretending she wasn’t already calculating the logistics of round two with the same focus she applied to temporal mechanics.

“Don’t move,” she said. Then, quieter: “Not yet.”