[Classroom 2-C, Seirin Academy, — 12:37 PM]
Sasaki held Ruri flush against him, one arm locked around the small of her back, his other hand cradling her jaw to tilt her face exactly where he wanted it. He kissed her like he was trying to memorize the inside of her mouth—tongue sliding past her lips, sweeping along the ridges of her palate, curling behind her front teeth, then dragging slow and deliberate against the soft underside of her tongue. He tasted the remnants of the strawberry milk she must have had earlier, faintly sweet under the warm, wet heat of her.
She's shaking already. Two days apart and her body's wound tighter than a spring.
What interested him wasn't the trembling—it was the response.
Ruri's spine had gone rigid the moment he pulled her in, every muscle braced like she was preparing for impact. Her fingers were clenched at her sides, nails biting into her own palms. But under the slow, insistent pressure of his tongue stroking hers, her eyes began to lose focus. The tight line of her shoulders softened by degrees. And then—there it was—her tongue pushed back against his. Clumsy. Uncertain. A tentative little nudge, like a question she was too embarrassed to ask out loud, followed by a second, bolder pass that twined around his tongue and held.
"Mmn—" A small, involuntary sound vibrated between their joined mouths.
She was kissing him back.
Not just tolerating. Participating. Her pink tongue curled against his in slow, unpracticed spirals, the movements endearingly artless—too much pressure here, too little there, occasionally bumping teeth—but genuine in a way that made heat gather low in Sasaki's stomach.
Her hips shifted. A subtle motion, almost imperceptible—a slow roll of her waist, her lower body pressing forward in a rhythm that matched the hand he'd slipped beneath the hem of her blouse. His palm rested flat against her lower abdomen, fingertips just barely grazing the invisible signature inked two inches below her navel, and every time she swayed into the contact, the muscles under his hand jumped and fluttered like something trying to get closer.
…She's actually moving with me.
Sasaki broke the kiss long enough to study her face. Ruri's eyes were half-lidded, pupils blown wide, the usual sharp clarity in those dark irises drowned under a glaze of arousal that made her look like she'd just woken from a fever dream. A thread of saliva connected their lower lips before it snapped and caught on her chin.
He was genuinely surprised.
Two days. He'd been apart from her for two days, and the girl who'd bitten him, slapped his hand, and called him every variation of pervert in her vocabulary was now grinding her hips into his palm of her own volition.
The signature marks. He'd intended to use the ten-day window to gradually condition her body—slow, methodical, like training a reflex. Pavlov with ink. But evidently he'd underestimated the Libido Marker's potency. The two signatures—one on her inner thigh, one on her lower belly—must have been stoking her arousal every waking hour, pushing her to touch herself, to chase relief that never quite satisfied, until the need had become a low, constant hum she couldn't switch off.
Two days of edging herself and she's this far gone. She probably came a dozen times this weekend and still couldn't get enough.
I might need to revise the timeline.
A new possibility flickered through his mind, and his pulse kicked up a notch. He filed it away for later and refocused on the girl clinging to him.
Sasaki deepened the kiss again, slower this time, savoring the way Ruri's breath hitched into a whimper when his tongue dragged along the roof of her mouth. His hand slid fully beneath her blouse, palm skimming the flat, warm plane of her stomach—smooth skin pulled taut over a slim waist, soft enough that his fingertips left faint impressions when he pressed. He traced idle circles around her navel, then angled downward, pushing past the waistband of her skirt. The fabric resisted, then gave, elastic stretching just enough to let his hand slide between cotton and skin.
His palm settled directly over the signature.
The effect was immediate.
Ruri's knees buckled. Both her arms shot up and locked around his neck, fingers clutching fistfuls of his collar, her entire body weight sagging against him as if someone had pulled her strings. Her thighs pressed together hard. A tremor ran through her from belly to spine, and the sound she made—"Hhah—aahn—"—was a broken, desperate thing that fogged against the side of his jaw.
God, she really can't stand up on her own.
Sasaki braced his stance, taking her weight easily, and began to rub.
His palm moved in slow, firm circles over the marked patch of skin—two inches below her navel, slightly off-center to the left, where the invisible ink formed the looping characters of his name. The flesh there was feverishly hot under his touch, almost damp with a thin sheen of sweat, and every pass of his hand made the muscles beneath contract in sharp, involuntary spasms. He could feel her pulse hammering against his fingertips, rapid and unsteady, as if her heartbeat had migrated south.
Her whole body's reacting like this zone is wired directly to her clit.
Ruri's consciousness dissolved into white noise. The hand on her belly was enormous, rough-palmed, radiating heat that sank through her skin and into something deeper—something that had been smoldering for two days straight and now flared into a blaze the instant he made contact.
Every circle he traced sent a bolt of liquid warmth racing downward, pooling between her thighs, building on itself like water approaching a rolling boil. Her inner walls clenched around nothing, rhythmic and desperate, and she could feel herself getting wetter with every pass of his fingers, the damp heat spreading until her underwear clung to her.
It's happening again—I can't—I'm going to—
Her thighs clamped together so hard they trembled. Her toes curled inside her loafers. The pleasure was climbing, climbing, each stroke of his hand ratcheting the tension one notch higher, and she was seconds from cresting, her breath coming in shallow, shuddering gasps against his chest, her vision narrowing to a bright, buzzing pinpoint—
His hand pulled out of her skirt.
The heat vanished. The pressure vanished. The world snapped back into focus with the cruelty of a cold shower, and Ruri was left gasping, her hips twitching forward into empty air, chasing contact that was no longer there.
No—
Her mind went blank with loss. A hollow, aching emptiness yawned open in her abdomen, so abrupt and total that it bordered on physical pain. Her flushed face twisted—brows knitting, lower lip trembling—and when she opened her glazed eyes to find Sasaki watching her with an expression of lazy amusement, something hot and indignant surged through her chest.
He stopped on purpose.
She stared at him, breathing hard, cheeks the color of crushed peonies, and the look in her eyes was unmistakable: Why did you stop?
She's glaring at me like I owe her something. Cute.
Then the fog cleared enough for self-awareness to crash back in. Ruri realized what expression she'd been wearing—realized she'd been angry at him for stopping—and her face went through a rapid series of transformations: confusion, horror, mortification, and finally a furious blush that spread from her cheeks to the tips of her ears.
She puffed out her cheeks. "Pervert! Creep!"
"Kind of late for that, don't you think?" Sasaki said, grinning.
Ruri's face drained of color. Her lips pressed into a thin, trembling line, and those enormous dark eyes—still wet and hazy from arousal—began to glitter with unshed tears. She looked like a small animal that had just been tricked out of food, helpless and betrayed and too proud to admit she was still hungry.
Sasaki reached out and pressed his palm against her lower belly through her skirt.
Even through the fabric, the contact hit like a live wire. Ruri flinched, her whole body jerking, and a high, startled moan punched out of her—"Nnh—!" Her face went scarlet. She glared at him through tear-blurred eyes, trying for fury, but the wobbly set of her mouth and the way her legs pressed together undermined the effect entirely.
She looked furious. She looked pitiful. She looked adorable.
"Do you want me to touch you?" Sasaki asked, his voice low and warm, thumb tracing a slow arc over the spot where the signature hid beneath plaid cotton.
"No. Disgusting." She wrenched her face to the side, jaw set, nostrils flaring with rapid, uneven breaths. Her hands balled into fists at her sides, knuckles white, her entire frame vibrating with the effort of enduring the sensation without giving in.
Sasaki sighed theatrically. "Well. If you don't want it, I won't."
He lifted his hand.
The instant the pressure left her belly, Ruri's composure shattered. Her hand shot out—fast, unthinking, driven by pure reflex—and seized his wrist in a death grip, slamming his palm back against her abdomen with enough force to make them both stumble. She held it there, fingers white-knuckled around his forearm, pressing his hand into her body as if terrified he'd pull away again.
The action took approximately one and a half seconds.
The realization of what she'd done took three.
Ruri froze. Her gaze dropped to her own hand clamped over his, then rose slowly to meet his eyes, and the expression on her face was that of someone who had just watched themselves do something unforgivable in a public space.
I just—I grabbed his—I made him—
"Looks like you enjoy it quite a bit," Sasaki said, smirking.
His hand began to move. Slow, heavy circles against her lower belly, pressing the fabric of her skirt into the mark beneath, and Ruri's protest died in her throat as a long, trembling moan replaced it—"Aahh… hahh…" She squeezed her eyes shut, cheeks burning, lips parted around breathy little sounds that echoed off the empty desks. Her hips pushed into his hand without her permission, grinding in small, desperate circles.
That's right. Just like that. Let it build.
Sasaki watched the flush creep down her throat and disappear beneath her collar. Her lashes were damp, clumped together, casting feathery shadows across cheekbones that burned like they'd been slapped. The sounds she made climbed in pitch—airy, helpless, each exhale carrying a fractured syllable—"Ah—nn—hah—"—and her fingernails dug crescents into his forearm hard enough to sting.
He let her climb. Let her hips roll and stutter, let the tension coil tighter and tighter until her breathing went ragged and her moans thinned into desperate, keening whines, her thighs trembling violently, back arching—
He yanked his hand away.
"DON'T—"
Ruri's eyes flew open. She grabbed for his hand with both of hers, catching it mid-retreat, clutching it to her chest with the wild-eyed desperation of someone drowning. Her face was wrecked—flushed dark, tear-streaked, lips swollen from biting down on her own moans—and the look she turned on him had no trace of pride left in it. No defiance. No anger.
Just need.
She grabbed me like I was the last lifeboat on the Titanic. …God, this is addictive.
"What a sensitive body you have," Sasaki murmured, something between admiration and satisfaction warming his chest. He'd made her abandon every scrap of dignity in under ten minutes.
But he shook his head.
The devastation that crossed Ruri's face was almost theatrical in its completeness—eyebrows lifting, mouth falling open, eyes widening in pure disbelief, as if he'd just told her Christmas was canceled. She looked down at her own hands still wrapped around his, then back at him, and her chin wobbled.
"Do you still want me to touch your belly?" he asked quietly.
She looked at him with the round, glassy eyes of a puppy left in the rain. She nodded.
Is she even aware of what she's agreeing to right now? Does it matter?
Sasaki leaned in close. His lips brushed the shell of her ear, and he felt her shiver—full-body, head to toe—at the contact. His breath was warm against her skin, and he pitched his voice to a near-whisper.
"Then come home with me after school. When we get to my place… I won't just use my hand." He paused, letting the words settle. "I'll use my mouth."
Ruri's face went nuclear. A deep, involuntary swallow worked down her throat—he could see the movement, the column of her neck flexing as she gulped—and her lips parted to answer, the "yes" already forming on her tongue before some surviving fragment of rational thought seized the wheel and yanked.
Wait—what am I—he's—we're not even—this is dangerous.
He's Sasaki. He's the boy who wrote his name on my body. Going to his house means—
But Sasaki had already released her and turned away, walking toward the classroom door with the unhurried confidence of someone who had no doubt about the outcome. His footsteps echoed—tap, tap, tap—steady and even against the linoleum, not a single backward glance.
Ruri's lips pressed together until they went bloodless. Her fists trembled at her sides, and something hot and pitiful and confused stung behind her eyes as she watched him leave without so much as a pause.
He didn't even wait for my answer.
---
[Classroom 2-C — 1:15 PM – 3:30 PM]
The afternoon crawled.
Ruri sat at her desk with her textbook open to a page she hadn't read a single word of, staring at columns of equations that might as well have been written in Sanskrit. Mr. Takeda's voice droned from the front of the room—something about derivatives, or integrals, or the heat death of the universe—but it entered her ears as meaningless noise, a frequency her brain had simply stopped decoding.
Beneath her skirt, the skin below her navel pulsed with a low, maddening heat.
It had started the moment Sasaki left. A tingling itch that bloomed outward from the hidden mark, warm and persistent, like a sunburn that lived under the skin instead of on it.
During the first period it was manageable—distracting, uncomfortable, but something she could grit her teeth through. By the second period it had deepened into a heavy, liquid throb that synced with her heartbeat, sending waves of warmth down through her pelvis and into the juncture of her thighs. Her underwear had been damp since lunch. Now it was soaked through.
The phantom sensation of his hand was the worst part. She could still feel it—the rough heat of his palm, the deliberate pressure of his fingers, the way his thumb had traced slow arcs over the mark while her body shook itself apart. The memory replayed on a loop behind her eyes, vivid and merciless, and every iteration sent a fresh pulse of arousal rolling through her core.
Stop thinking about it. Stop thinking about it. Stop—
Ruri ducked her head, checked that no one was watching, and pressed the blunt end of her mechanical pencil against her belly through her blouse. She pushed gently, angling the tip into the spot where the mark burned hottest.
A tiny spark of relief. A fraction of the pressure she needed. She bit her lip and pressed harder, rotating the pencil in small circles, trying to replicate even a shadow of what his hand had done.
It wasn't enough. It was so far from enough that the attempt only made the ache worse, like scratching a mosquito bite and spreading the itch to twice its original size. The pencil was cold, thin, lifeless—nothing like the broad, commanding heat of his palm, nothing like the way his fingers had kneaded her flesh with a confidence that suggested he knew her body better than she did.
All weekend—I touched myself over and over and it was never enough—and now even that doesn't work—
She'd lost count of how many times she'd brought herself to climax over the past forty-eight hours, locked in her bedroom with the blankets pulled over her head and her hand wedged between her thighs. The orgasms came easily—too easily, triggered by the lightest brush of her fingers over either mark—but they left her feeling hollow afterward, unsatisfied, the relief lasting seconds before the heat rebuilt and demanded more. Like drinking saltwater to cure thirst.
That's why she'd crumbled so fast at lunch. Her body had been starving for his specific touch, and the moment she got it, every defense she'd constructed over the weekend—every mental wall, every whispered I won't let him—collapsed like wet cardboard.
I hate this. I hate him. I hate that his hand feels better than my own.
The final bell rang at 3:30.
Ruri's head snapped up. Her gaze locked onto Sasaki's seat three rows behind and one to the left with the speed and precision of a guided missile.
He's getting up.
Sasaki stood, shrugged his bag over one shoulder, and walked toward the door. His posture was relaxed, shoulders loose, jaw set in the easy half-smile he wore like default. He didn't turn around. He didn't look at her. He moved through the doorway and disappeared into the river of students flooding the hallway, and the space where he'd been sitting was suddenly, unbearably empty.
He's leaving.
He's leaving and he isn't going to look at me.
Ruri sat frozen for three seconds. Her lower belly pulsed—a deep, insistent throb, as if the mark itself was reaching for him, straining toward the retreating source of the only touch that could quiet it. The itch sharpened into something closer to pain, hot and crawling, like a colony of fire ants nesting beneath her skin, and her vision blurred as her eyes filled.
"Come home with me after school. I won't just use my hand. I'll use my mouth."
Her stomach dropped. Her thighs clenched. A shudder rolled through her that had nothing to do with temperature and everything to do with the vivid, unwanted image of Sasaki's mouth pressed against her bare skin, his tongue tracing the mark's invisible lines, warm and wet and thorough—
Ruri shoved her chair back with a screech of metal on tile, grabbed her bag, and bolted for the door.
Three classmates still packing their things looked up in unison, startled by the sudden violence of the movement. Aoi paused mid-sentence, one arm through her jacket sleeve, watching the normally composed class representative sprint into the hallway with the desperate urgency of someone chasing a departing train.
"…Was that Ruri?"
"What's her hurry?"
Ruri didn't hear them. She was already running, loafers slapping against linoleum, bag bouncing against her hip, weaving between clusters of students with her heart hammering against her ribs and the taste of strawberry milk still faintly sweet on her tongue.
---