---
[Park — 7:42 PM]
Riku's words pierced Satou Kiyo's chest like a thrown spear.
Her breathing quickened, shallow and ragged. Her right hand tugged unconsciously at the waistband of her pants—loose linen, cream-colored, the kind that hung low on her hips. She'd left in such a rush. Convinced that loose trousers meant panties were unnecessary.
But how did he know?
Riku closed the distance between them, inch by deliberate inch. The evening air carried cedar and fresh-cut grass, the distant hum of traffic bleeding through the treeline. Under the weight of his ability, Kiyo's thoughts began to fog, syrup-thick and sluggish.
"Why aren't you wearing any?"
Her eyes glazed, pink bleeding into her irises as she answered without meaning to.
"T-too... rushed... forgot... ahh—"
His hand had already slipped beneath the hem of her blouse, traveling downward—past the soft give of her belly, past the jut of her hip bone, fingers sliding through the trimmed thatch of hair until they found the slick heat waiting for him. Two fingers pressed in without warning, curling upward into the tight, wet clutch of her cunt.
When he withdrew, his index and middle fingers glistened—slick strands of arousal webbing between them, catching the dying amber light filtering through the oak canopy.
Kiyo's face burned. The smell of her own want hung sharp and sweet between them—unmistakable. Shame crawled up her spine like cold fingers.
He inched closer still.
This time panic flickered through the haze. Her palms pressed flat against his chest, arms locked, trying to hold him back. She could feel his heartbeat beneath her fingers—steady, controlled. Nothing like hers, rabbiting against her ribs.
Her breath came faster. Shorter.
Just as expected. The moment her secret was exposed, her defenses crumbled like wet sand. All that remained was the final straw.
"Kiyo-san." His voice dropped low, intimate—a lover's register. "I know certain secrets about your little brother. If you'd prefer those stay hidden... be a good girl."
Ice shot through her veins.
Shirou's secret—
Does he mean—
The arms bracing against his chest went slack.
Kiyo surrendered completely.
Riku leaned in, his body pressing hers against the rough bark of the oak behind her. The texture bit into her shoulder blades through thin cotton. His lips brushed the shell of her ear, tongue flicking hot and wet across her earlobe, tracing the delicate curve before catching the soft lobe between his teeth.
"Nngh—haaah!"
Her entire frame jolted like she'd touched a live wire. Heat flooded south, pooling heavy between her thighs. Her nipples stiffened against the fabric of her blouse—she wasn't wearing a bra either. The rough linen dragged across them with every heaving breath.
"Wh-what... what are you going to do?" Her voice trembled, barely a whisper.
"Your phone."
Shaking fingers retrieved it from her pocket.
Riku took the device, thumbed through her contacts until he found Brother: Satou Shirou, and pressed call. Then he tossed it back.
Kiyo fumbled, nearly dropping it.
"Why are you calling my—"
Before she could finish, Riku's hands gripped her hips and lifted. She found herself face-to-face with him, thighs spread wide across his lap as he sat back against a low stone wall. The position splayed her open, obscene in its vulnerability—her pants bunched at her knees, the evening breeze kissing the wet mess of her exposed cunt.
A startled yelp escaped her lips.
She could feel him beneath her now. The rigid length of his cock straining against his slacks, pressing hot against her bare slit. He was big—thick enough that the shape of him alone made her stomach clench.
His fingers worked his zipper. The metallic rasp cut through the evening quiet.
Then his cock sprang free, slapping heavy against her inner thigh. She glanced down instinctively—couldn't stop herself—and felt her breath catch. Veined and flushed dark, the head swollen and leaking a bead of precum that smeared against her skin. Easily seven inches. Maybe eight. Curved slightly upward, the kind of shape that would drag against every sensitive spot inside her.
His fingers hooked into her waistband, dragging the fabric down to her thighs—and then he gripped her hips, positioned himself at her entrance, and pulled her down onto him in one fluid motion.
Sssschlck—
"NNGH—!"
White-hot pain tore through her. The sensation of being stretched, split open, filled completely—it flooded her skull and drowned every other thought. Her walls clenched involuntarily around him, spasming against the intrusion. He was too much. Too thick. The head of his cock kissed her cervix on that first brutal thrust, and her vision went white at the edges.
She nearly screamed.
The park was empty, but sound carried. One wrong noise and curious eyes would come searching.
Kiyo clamped her left hand over her mouth, her right hooking desperately around Riku's neck for purchase. Her forehead dropped against his shoulder, teeth biting into her own palm hard enough to leave marks. She could smell him—clean sweat and something woodsy, sandalwood maybe—mingling with the sharp musk of her own arousal.
From her phone:
Brrring... brrring... brrring...
The line went dead.
Relief washed through her—fleeting.
She shot Riku a glare full of frustrated anger. Her cunt throbbed around him, stretched tight, adjusting to the invasion. Every micro-movement sent sparks racing up her spine.
But then his hands gripped her hips and began to move her—lifting her bodily, the length of him dragging out inch by agonizing inch until only the swollen head remained inside, then dropping her back down with a wet schlp—and her capacity for coherent thought evaporated.
"Ahhh—! Nn—nngh—!"
He plucked the phone from her trembling fingers and redialed.
Brrring... brrring...
This time he didn't wait. His pace quickened, bouncing her in his lap with deliberate rhythm. Each downstroke buried him to the hilt, his balls slapping against the curve of her ass. The angle was devastating—the upward curve of his cock grinding against her g-spot with every thrust.
Schlp... schlp... schlp...
The obscene wet sounds filled the evening air, mingling with the distant chirp of cicadas and the rustle of leaves overhead. Her cunt squelched around him, embarrassingly loud, betraying just how soaked she'd become. Arousal dripped down his shaft, pooling at the base, trickling onto the stone beneath them.
The pain was fading now, replaced by something else—something that coiled tight and hot in her belly. Her toes curled inside her flats. Her thighs trembled where they gripped his hips.
This isn't... I shouldn't be... oh god, oh god—
Kiyo bit down harder on her hand, face buried in his shoulder. A flush crept up from her chest, staining her neck and cheeks deep crimson. Her nipples ached, rubbing against his chest through their clothes with every bounce.
What am I doing?
With a stranger—doing THIS—
Brrring... brrring...
Click.
"Stop calling me! I know I screwed up, okay? But what am I supposed to do about it?! Why are you even calling—to lecture me again?"
Shirou's irritated voice poured from the speaker.
Kiyo couldn't respond. Didn't dare. One word and she'd give herself away. She could feel every ridge of Riku's cock inside her, feel the way her walls fluttered around him, greedy and desperate despite herself.
"Hello? Nee-san? Why aren't you saying anything?"
Riku pressed the phone to her ear, his hips never stopping—slower now, a rolling grind that dragged sensation from her in waves. Long, deep strokes that churned her insides and made her eyes roll back. His thumb found her clit, circling the swollen nub with practiced pressure.
"Nnnh... mmph... haaah..."
"What's that sound? Nee-san?"
He leaned close, breath hot against her ear. "Aren't you going to answer him?"
His cock twitched inside her. She clenched around him involuntarily, and felt more than heard his low groan of approval.
"Kiyo-nee? What's going on? What's that noise?"
Riku's pace eased further, giving her the barest window to speak. But he didn't stop—kept that slow, torturous grind going, his cock stirring her insides, the head nudging spots that made lightning fork through her nervous system.
Kiyo forced words through gritted teeth, fighting to keep her voice level. Sweat beaded at her temples. Her inner walls clamped down rhythmically, trying to milk him despite her horror.
"N-nothing... I'm just... jogging..."
"Jogging?" Confusion colored Shirou's tone. "Since when do you jog?"
That wicked smile spread across Riku's face.
He slammed upward. Hard. His entire length burying inside her, cockhead kissing her cervix, his pelvis grinding against her clit—
"Ahhn—! J-just... nnh... felt like... mmh... trying it... today... aaah—haaah—!"
Her voice broke on a moan she couldn't suppress. Tears pricked at her eyes. The pleasure was too much—too sharp—cresting despite everything, despite her brother's voice in her ear, despite the horror of what she was doing.
"...?"
A beat of silence from the other end.
Then, sharper: "Nee-san. What's really going on? Where are you?"
Tears pricked at her eyes. She shook her head frantically at Riku, pleading silently. Her cunt squeezed him like a vice—she was close, horrifyingly close, orgasm building at the base of her spine like a wave about to break.
Not like this. Not while Shirou is—
"I'm... still at the park..." she managed, voice reedy and thin.
Riku's thumb found the end-call button.
"Wait there! I'm coming right now—!"
Beep. Beep. Beep.
The line went dead.
And then Riku moved.
Both hands gripping her hips, fingers digging bruises into soft flesh, he fucked up into her with abandon. Fast. Brutal. The wet slap of skin against skin echoed through the empty park. Kiyo sobbed against his shoulder, hand clamped over her mouth, her entire body shaking as the orgasm she'd been fighting crashed through her.
"Nnnngh—! Mmmmph—! Ahhh—HAAAH—!"
Her cunt clenched down in rhythmic pulses, milking his cock, gushing around him until their joining was a slick, dripping mess. Her back arched, thighs clamping around his hips, riding out wave after wave of devastating pleasure.
Riku grunted low in his chest, buried himself to the hilt, and came inside her.
She felt it—hot spurts painting her insides white, filling her until his seed overflowed, dripping down his shaft and onto the stone beneath them. The sensation triggered aftershocks, her walls fluttering around him, milking every last drop.
For a long moment, neither moved.
Then Riku lifted her off him, his softening cock sliding free with an obscene wet sound. Cum and arousal dripped from her abused cunt, splattering onto the stone. Her thighs trembled. She could barely stand.
He stood, tucked himself away, and checked his watch.
"Your brother should be here in about ten minutes." His voice was conversational. Pleasant. "You might want to clean up."
Kiyo stared at him—legs shaking, face tear-streaked, his cum leaking down her inner thighs—and felt something inside her crack.
---
Something was wrong with his sister—Shirou could feel it in his gut. His plans to visit Hazuki Uta dissolved instantly.
He grabbed his jacket and bolted for the door.
---
By the time Satou Shirou arrived, night had fully claimed the sky.
The park lay quiet, illuminated only by a handful of pale streetlamps. Not a soul in sight.
He dialed Shirou's number.
"The number you have dialed is currently switched off..."
Panic clawed at his chest. The empty paths, the silent trees—
"Shirou."
He spun.
Kiyo emerged from behind a large oak, one hand braced against its trunk for support.
"Nee-san! What happened?!"
The flush had faded from her face, though her legs still trembled faintly beneath her.
"N-nothing... Just... ran too hard. Lost my breath."
Shirou opened his mouth to press further, but she cut him off.
"Take me home. I overdid it."
Jogging until you can barely stand?
Questions swirled behind his eyes, but the look on her face brooked no argument. He swallowed his suspicions and wrapped an arm around her shoulders, guiding her toward the street.
---
Only after the siblings disappeared from view did Riku step out from the treeline.
The hypnotic seed had been planted.
He couldn't help but marvel at the power borrowed from 「Clumsy Performer」—the light hypnosis ability temporarily copied from "Uncle" in the Chii-chan`s Development Diary. Even now, fully conscious, Kiyo refused to acknowledge what had happened. The suggestion held firm.
Shame it's single-use. Random bug-type abilities like this wouldn't replicate on command.
Still—「Clumsy Performer」 demanded further exploration. Its potential far exceeded the other three titles.
Riku mentally catalogued his current arsenal:
「Shameless Thief」
「Despicable Orator」
「Clumsy Performer」
「Secret Explorer」
Four cards in hand.
He slipped his hands into his pockets and walked the opposite direction, lamplight casting his shadow long across the gravel path.