---
[Hirose Residence — Private Bedroom, Shibuya District | Saturday, October 12th, 7:42 PM]
"…Thank you for the compliment."
Riku pulled back just enough to meet her glare. His smile didn't waver.
Outside the bedroom door, laughter and conversation continued—Shiro's earnest chatter, Uta's dry replies, Kiyo's distracted silences.
None of them had any idea what was unfolding ten feet away.
She had no weapons against this man. No leverage. No angle of attack.
Against this shameless devil, Hirose Yoru had nothing but compliance.
If he truly decided to pursue the ten-million-yen debt and drag her mother into it — Yoru knew exactly what would happen. Her mother would agree. To anything. To everything. That quiet, tired woman who still folded Yoru's laundry — she would bend without a single word of protest if this demon showed up at her door.
Yoru's fingers curled into the hem of her skirt.
"As long as you don't go after my mother… I can—"
Riku tilted his head. The overhead light caught the edge of his jaw, sharp enough to cut paper.
"Can what?"
"I can… do whatever you say."
"Whatever? You're sure about that?"
Hirose Yoru closed her eyes. The motion looked like surrender — like a heroine in the final panel of a tragedy manga, the one where the artist leaves the background white and empty because there's nothing left to draw. She nodded, slow and deliberate, and gave Riku the confirmation he wanted.
Inside her chest, everything was collapsing.
But the scaffolding that kept her upright — the single iron beam refusing to buckle — was her mother. Her mother's quiet life. Her mother's safety. No matter what happened to Yoru herself, Riku's hands would never touch that woman. She'd swallow whatever she had to swallow to guarantee it.
Riku watched her nod.
Then his right hand dipped into his pocket and withdrew — slowly, theatrically, like a magician pulling a rabbit from a hat for an audience of one — a small, smooth, pink sphere. Slightly oblong. About the size of a quail egg.
"Do you know how to use this?"
Yoru's eyes snapped open.
The blood hit her face so fast it felt like a slap. Her entire body tremored — a visible, whole-body flinch that started at her shoulders and rippled down through her fingertips. The object sat in Riku's open palm, innocuous and bright and obscene in its cheerfulness, that bubblegum-pink shell catching the bedroom light like a piece of candy.
Several seconds crawled past. Yoru said nothing.
Riku's brow creased.
"I'll ask one more time. My patience has a limit."
His voice carried the weight of a closing door. Not loud — Riku was never loud. He didn't need to be. The threat lived in the quietness, in the way his tone dropped half a register and flattened out, leaving no room for interpretation. Yoru felt herself shrink, pressed back against an invisible wall like a small girl cornered by something enormous and immovable.
No strength left to resist.
Her lips parted. Barely.
"…I know."
"Tell me what it is."
Of course he'd make her say it. Of course he wouldn't let her escape with a nod or a whisper or a vague gesture. Riku wanted the words in her mouth. Wanted her to taste them.
Breaking someone starts with destroying their sense of shame.
"A… vi—"
"What?"
"A… vibrator… egg."
"Do you know how to use it?"
Yoru shook her head frantically, side to side, her loose hair whipping across her flushed cheeks.
"Then I'll help you put it in."
Both of Yoru's palms shot forward and flattened against Riku's chest. She pushed — or tried to. Her arms had no force behind them, trembling like wet paper.
"No—"
"No? You're sure?"
The question mark at the end of his sentence landed like a guillotine blade hovering an inch above her neck. Yoru's voice crumbled, lost all its edges, became something small and wet and desperate.
She began to beg.
"Please — today is my birthday — please, don't do this…"
"I promise — after today, I'll do anything you ask! Anything at all!!"
Her pleading rolled off Riku like rain off lacquered wood. His hand continued its slow approach toward her, palm still open, that pink egg resting in its center like an offering — or a sentence.
He made no effort to rush. The slowness was the cruelty.
Yoru shook her head again and again, a metronome of refusal, tears building at the corners of her eyes.
Then — suddenly — Riku pulled his hand back.
He pocketed the egg in one smooth motion and turned half away from her, his expression shifting into something bored, dismissive, like a customer who'd changed his mind about a purchase.
"Forget it. Since you're unwilling, we'll drop it. You just said you'd obey me in everything, but I suppose I'll pretend I didn't hear that either…"
A pause.
"It's just — your mother…"
He dragged the last syllable out like taffy, stretching it thin and long until it became something translucent and unbearable.
That was the straw.
The final one. The one that snapped the camel's spine clean through.
Yoru stood frozen for one second. Two. Three.
Then her fingers uncurled.
"I'll use it!… I'll… do it myself…"
The sentence came out like she was chewing glass. Every syllable cost her something she'd never get back.
Riku adjusted his collar.
"I already gave you the chance. You didn't take it. We're done here."
He stepped toward the door.
---
The most intoxicating thing in the world is hope inside despair.
---
Yoru's hand shot out and seized his arm.
In the span of a single heartbeat, the dynamic between them completed its inversion — a full one-eighty, clean and total, like a page turning. Moments ago, he'd been pressing forward and she'd been retreating. Now she was the one gripping, clinging, pulling him back toward her.
"I'll use it! Give it to me—"
"There's no need. The chance already passed."
Riku frowned and tried to shake her hand loose.
Yoru's tears finally broke free. They spilled down her cheeks in two uneven lines, and her voice cracked open, raw and ragged, the sound of someone who'd chewed through every last shred of their dignity and found nothing underneath but more desperation.
"Give me one more chance — let me do it — I'll listen… I'll be good…"
"I'll be good…"
She repeated it. Twice. Three times. I'll be good. I'll be good. The words tumbled out of her like a mantra, each repetition stripping another layer of enamel off her pride until there was nothing left but exposed nerve.
Riku let her repeat it a few more times.
Then, finally, he relented.
The game had already been won several moves ago. Every exchange — the offer, the refusal, the withdrawal, the panic, the begging — had been calculated. Subtle. Methodical. Each cycle eroded a little more of the wall Yoru had built around herself, and now that wall was rubble. The shift was complete: this was no longer Riku coercing Hirose Yoru into obedience.
This was Hirose Yoru begging him for the privilege.
"Time's limited," he said, glancing toward the door. "The people outside are getting restless."
He held out his hand. The pink egg sat in his palm again, smooth and warm from his pocket.
Yoru took it.
Her fingers closed around the small, oblong shape, and she felt its weight — barely anything, light as a cherry blossom petal, yet heavy enough to buckle her knees. Tears hung at the edges of her lashes, a single blink away from falling. Her lower lip trembled, bitten red and raw, and even through the humiliation and the helplessness, something defiant flickered in her expression — a cornered kitten baring milk teeth, claws too small to do any real damage.
"Scum," she hissed through clenched teeth. "You're scum."
Riku didn't flinch.
"Keep it coming. There'll be plenty more chances to curse me later."
Under his unwavering gaze, Yoru turned partially away. Her hands shook as she gathered the fabric of her skirt — a soft, pleated thing, cream-colored, the kind a girl picks specifically for her birthday — and hiked it up past her thighs. The skin there was porcelain-pale, smooth, faintly trembling. Her fingers hooked into the waistband of her panties — white cotton with a small ribbon bow at the front, the kind that looked almost childishly innocent — and tugged them aside.
She didn't look at him.
Couldn't.
The egg was slick with the warmth of her palm as she guided it between her legs. Her breath hitched — a sharp, stuttered inhale through her nose — as the smooth surface pressed against her entrance. She was barely wet, her body resisting even as her will had already surrendered, and the sensation of pushing the unyielding little sphere inside was a tight, foreign pressure that made her thighs clamp together involuntarily. A thin, strangled sound escaped her throat — not quite a moan, not quite a whimper, something in between that she immediately bit down on, teeth sinking into her lower lip hard enough to leave crescents.
Nnh—
The egg slipped fully inside with a soft, obscene schlck, and Yoru's knees buckled for half a second before she locked them straight. The sensation was immediate — a fullness that sat low in her belly, foreign and insistent, pressing against her inner walls with every micro-shift of her weight. She could feel it there, round and smooth and undeniable, nestled snugly against the sensitive ridge of her front wall.
Her panties snapped back into place. Her skirt fell.
Riku took a single, satisfied step backward.
"Not bad."
His tone was the same one a teacher might use after a student finally solves a basic equation.
"Let's play a little game."
He leaned closer. Close enough that she could smell that cologne again — sandalwood and cedar and something darker underneath, like smoke from a fire that had been burning for a very long time.
"From here on out — don't let your boyfriend or anyone else figure out what's happening. Understood?"
His voice was low. Almost gentle. The gentleness was the worst part.
It sounded exactly like a devil's whisper.
Tears — thick, humiliated, scalding — rolled down Yoru's cheeks in silence. She didn't sob. Didn't wail. The crying was quiet and continuous, like a faucet that couldn't be fully shut off, and each drop that slid past her jaw and fell onto the collar of her blouse carried a piece of something she'd never recover.
Riku pulled a tissue from the box on the nightstand and held it out to her.
"Dry your eyes. If you walk out looking like that, people will think I did something terrible to you."
A pause.
"And remember — don't let anyone notice."
Yoru took the tissue. Pressed it against her face. Blotted the evidence away with mechanical, trembling precision. She smoothed her skirt. Tucked a strand of hair behind her ear. Checked her reflection in the dark screen of her phone for half a second — red-rimmed eyes, flushed cheeks, bitten lips — and then turned, gripped the brass doorknob, and walked out of the bedroom.
---
The living room opened up around her like a stage.
The apartment smelled of vanilla frosting and takeout yakisoba, cardboard boxes stacked by the kitchen island, a half-assembled banner reading HAPPY BIRTHDAY Yoru drooping from one corner where the tape had come unstuck. Someone had queued up a lo-fi playlist on the Bluetooth speaker — soft piano loops and the faint crackle of vinyl static, the kind of ambient soundtrack that belonged in a café scene from a Makoto Shinkai film.
Satou Shirou spotted her immediately.
The tension that had been coiling behind his eyes — that strange, sour suspicion that had taken root the moment Yoru and Riku disappeared into the bedroom together — finally loosened. They'd only been gone a few minutes. Nothing could have happened in a few minutes. He exhaled through his nose, ran a hand through his sandy-brown hair, and jogged over to her side.
"Yoru, ready? We're about to light the candles!"
She looks a little pale. I hope she's okay. Maybe I'm overthinking things again — Nee-san's right, I hover too much.
Yoru nodded.
She opened her mouth to respond — and felt it.
A low, buzzing pulse. Faint. Barely there. Like a hummingbird trapped beneath her skin, its wings thrumming against something unspeakably sensitive. The vibration radiated outward from that small pink sphere nestled deep inside her, spreading warmth through her pelvis and up into the pit of her stomach.
Behind her, Riku emerged from the bedroom hallway.
His right hand hung casually behind his back. Between his fingers: a slim, pink remote control, no larger than a car key fob. His thumb rested on the button marked 1.
The remote's face displayed six numbered settings. 1 through 6.
He was on the lowest.
Yoru's body stuttered — a tiny, almost imperceptible hitch in her stride, a half-step that landed wrong, her weight shifting unevenly for just a fraction of a second.
Shirou noticed instantly.
"Yoru? What's wrong — are you feeling sick?"
There it is again — that weird look on her face. Something's off. I can feel it.
Yoru forced her expression into a smile. It sat on her face like a mask made of cracking porcelain.
"Nothing… I'm fine."
Satou Kiyou materialized at Shirou's elbow, her long chestnut hair swaying as she grabbed her brother's arm and tugged him a step back. She leaned in close, her voice dropping to a murmur meant only for him.
"Every girl has those days, dummy. Stop smothering her — honestly, it's no wonder things have been awkward between you two lately."
He means well, but god, read the room. She's probably cramping and he's acting like she's dying.
Shirou blinked. Processed. Nodded slowly, the understanding half-formed but enough to make him retreat.
He watched Yoru take small, careful steps toward the living room — short strides, knees close together, her posture slightly stiff — and decided his sister was probably right. Hovering during that time of the month would only embarrass her.
Riku fell into step beside Yoru.
His hand slipped into his jacket pocket. His thumb found the remote.
Pressed 2.
The jump was immediate — a deeper, steadier pulse that climbed from a whisper to a murmur, the vibration tightening against her front wall with renewed insistence. The egg hummed inside her, buzzing against slick, sensitive flesh, and the sensation lanced upward through her core like a thread of electricity being pulled taut.
Yoru's teeth clamped together.
A sound escaped anyway.
"Mmnh—!"
Low. Muffled. Barely more than a hum caught in the back of her throat, but her body betrayed her — her left knee buckled inward, her hip canting sideways, and for one terrible, suspended instant she nearly lost her footing entirely, her hand shooting out to catch the edge of the hallway wall.
Riku closed the distance between them with a single easy stride, his expression shifting into something warm and concerned — the perfect mask of a thoughtful friend.
"Yoru, are you alright?"
The voice of a saint. The hands of a devil.
Shirou was there in an instant, his fingers closing around Riku's wrist and pulling his hand away from Yoru's direction.
"Hayanui — Yoru's not feeling well. Could you not crowd her, please?"
I don't care if he's being nice — I don't want him that close to her right now.
Then Shirou turned to Yoru, his brow furrowed with earnest, oblivious concern.
"Yoru, let me help you sit down, okay?"
"N-no… I don't need — I just… my stomach hurts a little, that's all. I'll be fine in a minute."
The words came out fractured, threaded with a breathlessness she couldn't fully disguise. Her thighs pressed together beneath her skirt, muscles clenching around the persistent, maddening buzz that pulsed between her legs — steady now, rhythmic, a second heartbeat in a place no heartbeat belonged. Her fingernails dug into her own palms hard enough to leave marks, and she kept her gaze fixed on the floor, because if she looked up — if she met Riku's eyes — she knew exactly what she'd find there.
Amusement. Calm, patient, absolute amusement.
She swallowed hard and took another small step toward the living room, where the birthday cake waited on the table with its unlit candles standing at attention like tiny soldiers.