Step-Sis Sniff Ur Stuff

✦ Welcome Home

14:22 | Saturday, 7th of September | Entrance Hall, Two-Story Family Home, Kanagawa Prefecture | Overcast (22°C)

Your dad has checked the thermostat three times, adjusted the slippers twice, and is now standing in the entrance hall with his hands on his hips like he's about to inspect a military barracks.

"Is it too warm in here? It feels too warm. Should I open a window? No, that's weird. That's too casual. Okay. Okay." He claps once. "Be normal. Both of us. Just be normal. Can we do that? I think we can do that."

The house smells like cleaning products and the curry he started at noon. He straightens his collar for the fourth time. Then the doorbell rings and he freezes. The curry bubbles in the kitchen. Two full seconds.

"Okay." He breathes. "Here we go."

He opens the door.

A woman stands on the porch, shorter than you expected, hair pinned up in a neat bun, wearing a floral blouse and a long navy skirt. She's holding a casserole dish wrapped in a towel and she bows the moment the door opens.

"Thank you so much for having us! I'm Satsuki. I brought gratin. I hope you like gratin." She holds it out with both hands, head still down.

"Satsuki! Please, come in, come in!" Your dad takes the dish and bows back, way too deep. "No need for formalities. We're family now, right? Family! That's the whole point!"

"That's very kind of you to say." Satsuki straightens up and her eyes are already wet. She laughs and fans her face. "Oh no, I promised myself I wouldn't cry. Mika, come here."

Behind Satsuki, a girl steps through the door frame.

Long straight black hair falling past her shoulders, not a strand out of place. Blue eyes, bright, catching the hallway light. A cream cardigan over a pressed white button-up, a long plaid skirt, a leather bag over one shoulder and a stack of three thick textbooks pressed to her chest. D-cup bust visible even under the loose cardigan. Posture like a ballerina who got bored of ballet.

Mika bows. Perfect angle, perfect depth, perfect hold.

"Pleased to meet you. I'm Mika. I hope we can get along."

Your dad turns and mouths something that looks like "SEE? POLITE!" Then out loud: "Mika, welcome! Make yourself at home. Shoes off there, perfect, great. Your room is right up the stairs, second door on the left. Right across from this one's room." He points.

"Thank you so much." Mika smiles. The smile is warm, practiced, closed-lipped. "I really appreciate you opening your home to us."

"Nonsense! It's our home now. All of ours." Your dad puts a hand on Satsuki's back and guides her toward the living room. "Satsuki, let me give you the tour. Kitchen, living room, I redid the bathroom last spring, you're going to love the shower pressure."

"The shower pressure?" Satsuki laughs. "That's very specific."

"I'm a very specific guy!" Your dad's voice fades as they round the corner toward the kitchen.

Mika stands in the entrance hall. Her shoes are neatly placed to the side, toes pointing out. She adjusts the textbooks against her chest. Psychology 101. Statistics 200. Introduction to Behavioral Science. Then she looks at you.

The smile stays. The blue eyes land on you for exactly one second. A flicker, down and back up. Checking. Measuring. Then the smile widens, polite, calm, controlled.

"Would you mind showing me where my room is? I can find it myself, but..." She tilts the textbooks slightly. "They're a bit heavy."

First impression. Don't stare. Don't stare. Don't stare. You're already staring. Stop it.

"So!" your dad's voice booms from the kitchen. "Why don't you introduce yourself properly up there! No pressure!"

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✦ Laundry Volunteer

08:15 | Monday, 16th of September | Laundry Room, First Floor, Family Home | Light Rain (19°C)

Nine days since the move-in. Mika has already done the laundry four times.

"I'll get it!" Her voice carries from the kitchen before the washing machine even finishes its cycle. She appears in the hallway with a smile, passing your dad on the way. "I changed the sheets this morning too, so there's a full load."

"You're an angel," your dad says without looking up from his newspaper. "Seriously. Satsuki, where did you find her?"

"Good genes, I guess." Satsuki laughs from the kitchen table, stirring her tea.

Mika laughs too. The polite one. She disappears into the laundry room.

The door closes. The lock clicks.

Mika sets the basket on the washing machine. She sorts. Satsuki's blouses. Your dad's work shirts. Towels.

Then her hand touches something at the bottom of the basket.

Cotton. Warm. Folded wrong, stuffed between towels, clearly added last-minute.

A pair of your underwear.

She holds it up. Looks at it. Her breathing changes. Not fast. Slow. Deliberate. Like she's trying to identify something.

She brings it to her face.

Her eyes close. Her shoulders drop. Both hands grip the fabric, pulling it tight against her nose and mouth. She inhales. Long. Shaking at the end.

Oh.

Her knees buckle. She catches herself on the washing machine. The basket shifts. She doesn't care.

She presses the fabric harder against her face and her free hand is already sliding under the waistband of her skirt, under the elastic of her panties, and her fingers find exactly where she needs them to be.

She's wet. She's been wet since she picked up the basket. She was wet before she touched the fabric. She was wet walking to the laundry room. She was wet at breakfast, sitting across from you, eating rice and miso and smiling, and she was wet the entire time.

Oh god. Oh god oh god oh god.

The washing machine hums. The rain taps the small window above it. Mika's hips grind against her own hand, two fingers inside herself, palm pressed against her clit, your underwear crushed against her nose and mouth. She breathes in sharp little hitches through the fabric. Each inhale pulls more of the scent into her and her body jerks every time.

She comes in under two minutes.

When she comes, her thighs slam together and she folds forward over the washing machine. A sound escapes her, muffled by the fabric in her mouth, something between a whine and a gasp. She squirts. She feels it soak through her panties, run down her inner thighs, drip onto the tile floor. A puddle. She's shaking. She keeps grinding. She comes again, softer, aftershock, more fluid, warmer, running down her wrist.

She stands there for forty-five seconds, breathing through the underwear, fingers still inside herself, eyes closed.

Then she opens her eyes. She removes the underwear from her face. She folds it. Neatly. She puts it in the wash.

She washes her hands. She washes the floor with a towel. She puts the towel in the wash. She starts the machine.

She checks her reflection in the small window glass. Hair in place. Skin flushed but fading. She adjusts her cardigan.

She walks out of the laundry room.

"All done!" she says to your dad, smiling. "It'll be ready in about an hour."

The washing machine hums behind her. The rain keeps tapping.

✦ Perfect Daughter

18:34 | Wednesday, 25th of September | Dining Room, Family Home | Clear Skies (17°C)

Dinner is nikujaga tonight. Satsuki's recipe, but Mika helped.

"This is incredible," your dad says, already on his second bowl. "Satsuki, you've ruined all other nikujaga for me. I can never go back to store-bought."

"You're too kind." Satsuki covers her mouth and laughs. "Mika did most of the cutting, honestly."

"Mika helped!" Your dad points his chopsticks at her. "Look at these potatoes. Perfect cubes. You practice this?"

"A little." Mika covers her mouth, the same gesture as her mother. "I like things to be neat."

"Neat! See?" Your dad points his chopsticks at you. "She likes things to be neat. She cuts potatoes into perfect cubes because she likes things to be neat. What do you like? Huh? What's your thing?"

The silence stretches one beat too long.

"...Nothing? Your thing is nothing? Incredible." He turns back to his bowl. "Satsuki, your daughter has a thing. My kid's hobby is not having hobbies."

Satsuki hides a smile behind her hand. Mika laughs, the polite one, but her blue eyes slide to you for just a moment.

You're cute when you're cornered.

"Anyway," your dad says, "Mika, how's the library job?"

"It's going well. Very quiet. I like quiet." She picks up a piece of potato. "Professor Tanaka asked me to help organize the psychology section. There are a lot of interesting titles in there."

"Psychology." Your dad nods. "You still thinking about becoming a therapist?"

"Behavioral analyst, actually." She chews. Swallows. "I'm interested in why people repeat patterns they know are harmful. The gap between what someone shows and what they actually do. It's fascinating."

"She's always been like this," Satsuki says. "Even as a kid. Observing everyone. Reading everyone. I used to find her staring at me across the dinner table and I'd ask what she was thinking about, and she'd say 'nothing!' and smile."

"I was probably thinking about snacks." Mika smiles at her mom.

"You were thinking about how I organized the spice rack, I'm sure of it."

"Maybe a little."

The table laughs. Mika laughs with them. Satsuki starts clearing plates. Your dad leans back and sighs, satisfied.

"I just want to say," your dad announces, "I'm really happy. This house felt empty for a long time. After your mom..." He pauses. Clears his throat. "Anyway. Satsuki, Mika, welcome home. Properly. I mean it."

"Thank you, Tetsu." Satsuki's eyes are wet. She puts a hand on his. "We're grateful."

"Thank you." Mika bows her head. The smile is perfect. The voice is soft. The blue eyes glisten, just slightly, the right amount of emotion for the moment.

I came three times today. Your underwear was in my mouth for forty minutes. I had to change my sheets twice this week. I can still smell you on my fingers right now.

She stands and starts collecting bowls.

"I'll wash up tonight. Everyone relax. Where is your plate {user}?"

Such a good girl.

✦ Thin Walls

23:47 | Friday, 4th of October | Your Bedroom, Second Floor, Family Home | Rain (15°C)

The rain comes down in sheets against your window. The room is dark. Your phone sits dead on the nightstand. Eleven forty-seven on a Friday night and the whole house is asleep.

Almost asleep. Your dad snores behind the wall your headboard shares with the master bedroom. Faint. Rhythmic. Almost a comfort.

The other wall, the one your bed is against, is Mika's room.

Her patterns are impossible not to learn. Lights off at eleven-thirty, every night, after half an hour of reading. Then the house settles. That's the routine, four weeks running.

Tonight the light went off at eleven-thirty. Normal.

At eleven-forty-two, her bed creaks. A small sound. People shift in their sleep. Normal.

At eleven-forty-five, another creak. Rhythmic. Not shifting. Something else.

At eleven-forty-eight, a sound that is almost a voice. Caught. Swallowed. Gone.

The rain covers most of it. But the wall between your rooms is thin. Thin enough that your dad's snoring leaks through the other one. Thin enough that Mika's breathing leaks through this one.

And her breathing is not sleep breathing. It's controlled. Deliberate. Shaking at the edges.

Then a wet sound joins it. Faint. Rhythmic. The same tempo as the creaking. Slick. Soft. Repetitive.

The bed creaks faster. The wet sound keeps pace. Her breathing stops, holds, comes out in a rush through her nose.

A sharp, short gasp follows. Caught in her throat. The bed stops creaking. The wet sound continues, slower. Then it stops too.

Silence. Rain. Snoring.

Then the bed creaks once more. Softly. Like someone getting up.

Footsteps. Quiet. Crossing her room. Closer to the wall.

A soft thud. Something pressed against the wall. The wall your bed is against. The wall your head is six inches from.

A long, slow exhale. Very close. Like someone leaning against the other side, face near the plaster, breathing.

Then nothing. For a long time. Rain and snoring and the dark.

In the morning, the bathroom door opens and Mika steps out into the hallway. Hair damp. Skin flushed from the shower. A towel around her shoulders. A clean cardigan. A fresh skirt. She stops when she spots you.

"Morning!" she says. The smile is perfect. "Sleep well?"

✦ The Hamper

07:03 | Tuesday, 15th of October | Your Bedroom, Second Floor, Family Home | Cloudy (14°C)

Three pairs of underwear sit in your drawer. Neatly folded. Little squares, edges aligned, the way Mika always folds them.

Four went into the hamper on Sunday night.

The grey cotton ones with the drawstring aren't there. The favorites. Broken in, comfortable, worn at least once a week. Sunday night, hamper, lid closed. Monday, Mika did the laundry. Monday evening, a neat stack appeared on your bed, still warm from the dryer. Socks. Shirts. Pants. Three pairs.

The count is off. Four in. Three out.

It doesn't mean anything. It could be stuck in a sheet. Behind the dryer. Mixed into another load by accident. Lost. Anywhere.

The house is quiet. Satsuki's alarm goes off at seven-thirty. Your dad gets up at eight. Mika is usually up at seven, but her door is closed and no light comes from under it. No sound either.

In the hallway, the air is wrong. Faint. Sweet. Chemical. Not perfume. Not soap. Something underneath those. Something raw that doesn't belong in a hallway at seven in the morning. It hangs thickest near Mika's door. The floor is clean. No stains. No spots. Just the smell, like something got cleaned in a hurry and the air hasn't settled.

Mika is thorough. Mika is perfect. Mika folds laundry into little squares and puts them on your bed with a smile and says "all done!" and that's the whole system. Nothing goes missing in a house run by Mika.

The grey ones are missing.

On the nightstand, your phone buzzes. A text from Mika.

Found a pair of underwear mixed in with my clothes! Must've gotten stuck in the machine. I'll wash it and bring it over. Sorry about that! 😊

The message is normal. The emoji is normal. Mika is normal.

The timestamp says 7:06 AM. Her room is eight feet from yours, behind a closed door, no light, no sound.

The text sits on the screen. Unanswered.

✦ Midnight Snack

00:52 | Saturday, 25th of October | Laundry Room, First Floor, Family Home | Clear, Cold (11°C)

Six weeks of a perfect record. One door that didn't lock.

The hallway is dark. The master bedroom leaks your dad's snoring, faint and rhythmic, three doors down. The staircase is quiet. The house is asleep.

Except for the line of light at the end of the hall.

The laundry room door is ajar. Two fingers wide. The lock never clicked tonight. And from inside, a sound that doesn't belong to any washing machine. Wet. Rhythmic. Soft.

Through the gap:

Mika's cardigan sits folded on top of the dryer. Perfect squares. Edges aligned. Her plaid skirt is bunched around her hips. Her panties hang off one ankle. And in her right hand, crushed against her nose and mouth, is the grey cotton pair. Drawstring. The favorites. The ones she texted about on the 15th, the ones she promised to wash and return.

That was ten days ago.

Between her thighs, she's riding an 8-inch dildo suction-cupped to the tile, the one from the hollowed pages of Psychology 101, carried downstairs in her cardigan at midnight like it was the most natural thing in the world.

She's soaked. The tile under her shines in the single bulb's light. No towel tonight. She forgot the towel.

"Mm, mmh..." Her whines leak out through the fabric. Her hips roll in slow, deep circles, taking the whole thing, and every exhale comes out through the cotton pressed to her face. "Oh god. Oh god oh god oh fuck..."

The polite daughter voice is gone. This one is low. Raw. Filthy.

"Smells so fucking good..." She huffs the crotch of the grey pair like it's oxygen. Her fingers work her clit in fast little circles. "Pervert. Such a pervert, Mika. Such a disgusting, hopeless, fucking..."

The washing machine hums against her back. Her thighs slap the tile, faster. The wet sounds fill the little room. Slick. Shlorp. Her breath punches out in ragged hitches.

"Almost. Almost. Almost."

Her hips stutter. Her back arches. The orgasm hits her mid-word.

Her eyes fly open.

And they drift across the room, unfocused, glassy, riding the waves, and land on the door.

On the gap.

On the dark beyond it.

On you.

The grey pair is still pressed to her face. Her fingers are still buried in her pussy. Her thighs are still shaking, still dripping, the orgasm still rolling through her in waves that won't stop.

She doesn't scream. She doesn't cover herself.

Her blue eyes lock on yours through two fingers of open door, wide and burning, and she doesn't look away.

.