[Seirin Academy – Main Building to Sasaki's Apartment]
Sato Ruri burst through the stairwell door so hard the metal handle cracked against the concrete wall behind it. Her school bag swung wildly against her hip as she sprinted across the first-floor corridor, indoor shoes squeaking against linoleum still damp from the afternoon custodian's mop. The chemical tang of floor cleaner stung her nostrils, mixing with the faint sweetness of cherry blossoms drifting through the open windows lining the hallway.
Through the glass, she could see him.
Sasaki Fuyumi's silhouette moved at an unhurried pace toward the main gate—hands in his pockets, blazer slung over one shoulder, the afternoon sun catching the sharp line of his jaw as he turned his head slightly, as if savoring the breeze. He looked like someone without a single obligation left in the world.
Ruri's chest ached. Not from the running—though her lungs already burned from taking the stairs three at a time—but from something lower, something insistent and crawling beneath her skin. The spot just below her navel throbbed with a maddening, rhythmic pulse, like a second heartbeat she hadn't asked for.
He's leaving. He's actually leaving.
She shoved through the main entrance and hit open air, the late-afternoon warmth pressing against her flushed cheeks like a warm cloth. Students milled about in clusters near the shoe lockers and the bike racks—conversations about evening plans, complaints about Matsuda-sensei's pop quiz, the tinny sound of someone's phone playing a Bocchi the Rock! clip at full volume.
"Ruri? What's wrong?"
Reina Yanagi's voice registered somewhere behind her, distant and irrelevant. Ruri caught a flash of her friend's concerned face in her peripheral vision—Reina standing near the vending machines with her bag over one shoulder, a can of milk tea halfway to her lips.
Ruri didn't slow down. Couldn't.
Her legs carried her past the gate's wrought-iron posts and onto the sidewalk, the rubber soles of her loafers slapping against sun-warmed concrete. Sasaki's figure grew larger but no closer; he walked with the easy, long-legged stride of someone who knew exactly where he was going and felt no urgency about getting there.
I look insane. I look completely insane.
Back at the vending machines, Reina Yanagi lowered her milk tea and stared at the empty gate where Ruri had vanished.
She said she was tired. She said she wanted to nap in the classroom. Reina's brow furrowed, and she chewed the inside of her cheek, replaying the last few minutes. She'd seen Sasaki Fuyumi walk past not thirty seconds before Ruri came tearing through the hallway like something was chasing her.
No way. Ruri doesn't chase boys. She barely acknowledges they exist.
…Unless there's something different about this one.
Reina's eyes narrowed, thoughtful, but she had no one to voice the suspicion to. She took a slow sip of her tea and filed the observation away.
---
Ruri kept a careful distance—close enough to never lose sight of his back, far enough that she could pretend she wasn't doing what she was obviously doing. Her breath came in short, ragged pulls. Sweat gathered at the small of her back, dampening the cotton of her blouse where it tucked into her pleated skirt. The late-afternoon air carried the scent of warm asphalt, exhaust from a passing delivery truck, and the faintly sweet rot of overripe fruit from a grocery display she stumbled past without seeing.
Every third step sent a fresh wave of that unbearable, crawling itch radiating outward from the spot below her belly button—the exact place where his handwriting sat inked into her skin. The sensation traveled downward, forking along the creases where her thighs met her hips, and she had to clench her jaw to keep from whimpering on a public sidewalk.
I'm following a boy home like some kind of… like some perverted stalker in a doujin.
She hated the thought. She hated more that the thought didn't make her stop.
Her fingers drifted to her abdomen—just a light press through the fabric of her skirt, a subtle circular rub meant to soothe. It didn't soothe. It made the itch worse, sharper, like scratching a mosquito bite until it bled. She yanked her hand away, face burning, and glanced around to see if anyone had noticed.
An elderly woman watering a planter box on her balcony. A stray calico licking its paw on a low wall. Nobody watching.
How much further is his apartment?
The urgency of the thought shocked her. She pressed her thighs together mid-stride and nearly tripped over a raised crack in the sidewalk.
Ahead, Sasaki's pace quickened—subtle, just enough to widen the gap between them by a few meters.
She's still coming. He could feel her presence behind him like heat from an open oven. The corners of his mouth twitched upward, hidden from her angle. Good girl. Let's see how far you'll follow.
He lengthened his stride. The evening ahead unfolded in his mind like a hand of cards he'd already stacked.
---
[Sasaki's Apartment Complex – Entrance | 5:14 PM]
The apartment building's exterior was the same dull beige it always was—three stories of narrow balconies draped with laundry, a rusted bike rack near the entrance, and the faint smell of someone's miso soup drifting from a second-floor window. Sasaki took the stairs without looking back, keys already in his hand. He unlocked the door, pushed it open, and stepped inside.
He left the door ajar. Not wide—just enough. A sliver of warm interior light spilling into the dim hallway.
Ruri reached the top of the stairs forty seconds later, gripping the railing with both hands, chest heaving. Her blouse clung to her skin with perspiration. Each breath tasted like rust and exertion. The itch below her navel had become something worse—a deep, pulsing throb that made her inner thighs tremble with every heartbeat.
She stared at the open door.
Warm light. The faint smell of his apartment—laundry detergent, the woody note of sandalwood from whatever cheap incense he burned, and beneath it something distinctly him, masculine and clean and dangerous.
If I walk through that door, I can't pretend this is an accident.
Her hand was already on the doorframe.
She stepped inside, face flushed crimson, breathing through her mouth in shallow little gasps that she couldn't quite control.
Behind her, the adjacent apartment's door cracked open. Ichinose Sayuri—Sasaki's neighbor, a woman in her late twenties with a perpetually curious expression—poked her head into the hallway just in time to see Ruri's pleated skirt disappear into Sasaki's apartment.
Hm. So the little heartbreaker is bringing his crush home to "prove his health," is he? Sayuri's lips curved with amusement, and she closed her door with a quiet click, already composing the teasing remark she'd deploy the next time she ran into him.
---
Inside, Ruri barely had time to push the door shut before the world tilted.
THUD.
Her back hit the door. Sasaki's body pressed against her front—chest to chest, his blazer abandoned somewhere between the entryway and this exact moment. His hand cupped the back of her neck, tilting her face upward, and then his mouth was on hers.
Not gentle. Not asking.
He kissed her like he was settling an argument, his lips firm and hot against hers, parting them with a confidence that left no room for hesitation. His tongue pushed past her teeth and swept across the roof of her mouth, tasting her—she tasted like strawberry lip balm and the faintly metallic edge of adrenaline.
His other hand slid down her front, fingers splayed across her stomach, and pressed firmly against the spot just below her navel where his signature sat hidden beneath layers of fabric. He rubbed—hard, rough, circular motions that ground the heel of his palm against the inked skin through her skirt.
"Nnhh—" Ruri's entire body shuddered. The sound that escaped her throat wasn't protest. It was relief—the bone-deep, desperate kind, like the first gulp of cold water after hours in summer heat. Her knees buckled, and only the door behind her and his body against her kept her standing.
It's stopping. The itch is—oh god, it's actually—
She kissed him back.
Clumsy, graceless, her tongue venturing out in a tentative slide against his before he caught it, sucked it, rolled it against his own until she was making soft, muffled sounds into his mouth—"mmph… hahh… nn"—her lips swelling pink and wet under the assault.
Sasaki pulled his mouth away with a slick, audible pop. A thin strand of saliva bridged the gap between their lips for a half-second before breaking. He was breathing hard—nostrils flaring, pupils blown so wide the dark brown of his irises had nearly vanished.
He dropped to his knees.
His fingers found the clasp at the side of her skirt, thumbed the button open, tugged the zipper down. The pleated fabric crumpled to the floor around her ankles with a soft whisper of polyester on skin.
And there she was.
Her lower half clad only in a pair of white spandex safety shorts—the kind every girl at Seirin wore under their uniforms—stretched obscenely taut over the wide, heavy curve of her ass and the plush swell of her mound.
The fabric was thin enough that the outline of her panties showed through in crisp detail: the elastic edges, the subtle ridge of the cotton gusset pressed against her slit. Her belly was flat and pale above the waistband, smooth skin interrupted only by the bold black strokes of his name—Sasaki Fuyumi—written in his own handwriting just below her navel, the ink slightly smudged at one edge where sweat or friction had softened it.
Sasaki's mouth went dry.
Fuck.
Ruri's eyes fluttered open. The sudden coolness on her bare legs snapped through the fog in her brain just enough for awareness to flood back—she was standing in his entryway, skirt pooled at her feet, his face level with her hips, his eyes locked on the most intimate parts of her body with an intensity that made her stomach flip.
"D-don't—don't look—" Her hands shot downward, fingers spread, trying to shield herself.
Sasaki caught both wrists with one hand and pinned them against the door above her hip. With his free hand, he gripped the soft flesh of her outer thigh—fingers sinking into the plush give of it—and leaned forward.
His tongue touched the ink of his own name.
One slow, flat, deliberate lick. Root to tip of the first character, his tongue hot and wet against the thin skin below her navel, tracing the brushstrokes he'd written days prior.
Ruri's spine arched off the door like she'd been shocked.
"Ahh—!" The sound ripped out of her, high and startled and wrecked.
"That's your reward," he murmured against her skin, breath ghosting warm over the saliva-wet characters. He glanced up at her through his lashes, mouth curved in that infuriating half-smile.
Then he buried his face back against her belly and went to work.
His tongue swept in long, languid strokes across the flat plane below her navel—tracing the signature, wandering beyond it, lapping at the sensitive skin in the hollows beside her hip bones. Saliva pooled and smeared, catching the overhead light, turning her pale stomach glossy and obscene.
The smell of her filled his nostrils—warm skin, the fading floral note of her body wash, and beneath it, rising steadily, something sharper and sweeter: the unmistakable scent of arousal, heady and intimate, growing stronger with every pass of his tongue.
Ruri's protests died somewhere in her throat. Her hands, freed at some point she couldn't remember, found his hair—fingers threading into the dark strands, gripping, pulling him closer instead of pushing him away.
This is wrong. I know this is wrong. I know I should—
"Hahh… nnhh…"
She couldn't finish the thought. Her head tipped back against the door, lips parted, brow creased in an expression that hovered between anguish and bliss. Her hips rolled forward involuntarily—a tiny, instinctive thrust toward the source of sensation—and she felt his hands slide around to her backside.
Both palms. Full grip. His fingers dug into the heavy, yielding flesh of her ass through the taut spandex, kneading in firm, rhythmic squeezes that made the safety shorts ride up into the crease between her cheeks. He groped her without subtlety or apology—grabbing, releasing, grabbing again, each squeeze pulling the fabric tighter against her mound until the outline of her pussy lips showed through the white spandex in damning relief.
"Mmnn… Sasaki… hhahh…" Her voice had dropped into a breathy, trembling register she didn't recognize as her own. Her hips pushed into his hands, then forward toward his mouth, caught between two points of devastating contact and unable to choose.
I can't stop. I don't want to stop.
Her own hand drifted down—past his head, past her hip—and pressed against the wet, saliva-slicked skin where his name glistened. She rubbed it. Softly at first, then harder, the pad of her middle finger circling the ink in small, compulsive motions, as if she could push the sensation deeper through her own skin.
Sasaki felt her fingers brush against his jaw as she touched herself, and something in his chest tightened like a wire pulled taut. His breathing turned ragged, hot and damp against her belly. He kissed lower—past the waistband of the safety shorts, down to the subtle mound pressing against the stretched fabric.
His lips sealed over the clothed swell of her pussy, and his tongue pushed against the thin spandex, dragging a slow, firm stroke along the length of her slit through the double layer of shorts and panties.
"NnhHHH—!" Ruri's thighs clamped against the sides of his head. Her whole body seized—shoulders pressing back against the door, belly trembling, the muscles in her legs locking rigid. The fabric between his mouth and her cunt was damp now—not just from his saliva. Warmth bled through from the other side, and the taste that reached his tongue was unmistakable: slick, faintly sweet, with a tang like copper pennies held in a warm palm.
He pressed harder. Flattened his tongue and dragged it upward, searching for the firmer bud of her clit through the layers, and when he found it—a subtle raised point near the apex of her slit—he sealed his lips around it and sucked.
"AaahHH—hahh—hahh—" Ruri's fingers clawed at the door behind her, nails catching on the painted wood. Her other hand gripped his hair so tightly her knuckles went white. Her pelvis bucked against his face in jerky, graceless thrusts, chasing the pressure of his mouth with a desperation that would have mortified her if she'd had a single rational thought left to spare.
The spandex was soaked through now. A dark, spreading stain centered where his mouth worked, the white fabric turned translucent and clinging to the puffy contours of her labia like a second skin. Sasaki inhaled deeply—nose pressed against her mound, breathing her in—and the raw, concentrated scent of her arousal hit the back of his throat like whiskey.
I can't take this anymore.
He surged to his feet. His hands hooked under her thighs—right at the crease where ass met leg, fingers dimpling into soft flesh—and he lifted her off the ground in one fluid motion. Ruri gasped, arms locking reflexively around his neck, legs wrapping around his waist. The wet heat of her cunt pressed against his stomach through the ruined shorts, and the contact sent a visible shudder through both of them.
Sasaki carried her down the narrow hallway toward his bedroom, her weight settled against him, her face buried in the crook of his neck where she panted hot, open-mouthed breaths against his pulse point.
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