Your Sisters Slut Friend

The midday sun beats down relentlessly, casting a golden haze over the bustling city streets. The hum of air conditioning fills the apartment, where you’re sprawled on the couch, the oppressive summer heat making it hard to do much of anything. Your sister, Kiyomi, sits nearby with a glass of iced tea, flipping through her phone.

“She’ll be here soon,” Kiyomi says casually, glancing at you with a small smile.

“Who?” you ask, though your question is more out of politeness than genuine curiosity. Your sister had mentioned a friend moving in temporarily, but the details had been sparse.

Before Kiyomi can answer, there’s a loud knock at the door. She rises with a lazy stretch and strolls over to open it. The moment the door swings open, a familiar yet striking figure stands in the doorway, silhouetted against the blazing sun.

“Rika!” Kiyomi exclaims, stepping forward to hug the visitor.

“Hey, Kiyomi! Long time no see!” Rika replies, her voice just as confident and vibrant as you remember. Her silver hair is pulled into a messy ponytail, a few strands sticking to her slightly flushed face from the heat.

But what really catches your attention—and momentarily leaves you frozen in place—is her outfit. Or rather, the lack of it. She’s dressed in a bikini top that barely covers her, short denim shorts cut high enough to reveal the straps of her thong, and sandals. The outfit is clearly her way of combating the summer heat, but it’s far from what you’d expect for someone moving into a shared apartment.

Rika glances past Kiyomi and locks eyes with you, her lavender gaze sharpening for a split second before recognition dawns. “Wait… is that you?” she says, her mouth curling into a smirk. “The little bro? No way. You’ve grown up!”

You sit up awkwardly, suddenly hyperaware of how much you’ve changed since the last time she saw you. Before you can even respond, Rika steps inside, dragging a small suitcase and a couple of overstuffed bags behind her.

“God, it’s so hot out there,” she mutters, kicking off her sandals and fanning herself with one hand. Her tone shifts back to her usual teasing self as she turns to you, one eyebrow raised. “So, you’re the little guy who used to follow me around everywhere? Cute.”

Kiyomi laughs, shaking her head. “He’s not so little anymore, is he? Anyway, Rika’s staying with us for a bit. Be nice, okay?”

Rika flops onto the couch next to you, her thigh brushing against yours as she leans back with a dramatic sigh. “I hope you don’t mind. I’ve been crashing all over the place lately, but Kiyomi’s place sounded perfect. Besides, I figured you’d be a gentleman and help me settle in, right?”

She winks at you, her teasing tone making it impossible to tell if she’s serious or just enjoying making you squirm. Kiyomi watches the exchange with an amused smile but doesn’t intervene.

“Well, I’ll leave you two to get reacquainted while I figure out where to put her stuff,” Kiyomi says, walking off toward the hallway.

The hiss of water and the comforting warmth of steam fill the bathroom as you stand under the showerhead, letting the droplets cascade over you. The early morning light filters dimly through the frosted window, and the apartment is quiet, save for the sound of the water and your thoughts drifting in the peaceful moment.

Suddenly, there’s the sound of the bathroom door opening and closing. Before you can react, Rika’s unmistakable voice cuts through the steam-filled air.

“Morning!” she chirps, her tone light and casual, as if walking in on someone in the shower is the most normal thing in the world.

You freeze, turning your head toward the semi-blurred figure through the fogged-up glass door. Rika’s silver ponytail is unmistakable, as is her nonchalant attitude as she casually steps inside the shower space, completely nude. The warm steam clings to her skin, accentuating her flawless figure in a way that makes it impossible to ignore.

“Room for one more?” she asks, not waiting for an answer as she steps under the spray of water beside you, sighing contentedly. “Ahh, that feels amazing. This heatwave has been killing me.”

Rika glances at you out of the corner of her eye, her expression playful. “What? You act like you’ve never showered with someone before,” she teases, reaching for the shampoo bottle on the shower shelf. “Relax, it’s not a big deal. Back in college, this was totally normal for me and my roommates. Saves time, you know?”

Her tone is so casual it’s almost disarming, as if nothing about the situation is out of the ordinary. She starts lathering shampoo into her hair, completely unbothered by the fact that you’re standing mere inches away.

“Besides,” she adds with a smirk, glancing at you again, “it’s not like we’re strangers. I’ve known you since you were little, remember? No need to be shy.”

The early morning light filters softly through the thin curtains of your room, casting a warm glow across the bed. You stir, half-asleep, but something feels... off. There’s warmth pressed against you—too close, too unfamiliar. As your eyes blink open, you’re met with the sight of Rika, her silver hair slightly mussed and her bathrobe barely staying closed. She’s curled up against your side, her face buried in your shoulder, and her legs entangled with yours under the covers.

“Mmm...” she murmurs, shifting slightly. Her voice is slurred, thick with drowsiness, and she’s clearly not fully awake. “Where... am I?” she mutters, her lavender eyes fluttering open briefly before she closes them again, letting out a contented sigh.

“Wait,” she slurs softly, clinging tighter to your arm. “This bed... is comfy. So warm...”

You don’t say a word, unsure of how to handle this. Rika seems completely unaware of where she is—or who she’s with. Her cheeks are flushed, her breathing slow and shallow, and there’s a faint scent of sake clinging to her. She must’ve gotten drunk last night and wandered into your room without realizing it.

She nuzzles closer, her fingers gripping your arm like a lifeline. “Don’t move... too tired,” she mumbles, her words barely coherent. Her voice takes on a strange, almost kitten-like quality, soft and clinging, completely unlike her usual confident demeanor.

“Who’s... bed is this, anyway?” she mutters after a long pause, finally cracking one eye open. Her dazed expression meets yours, and for a moment, she just stares, her mind clearly trying to catch up with reality.

“Wait...” She blinks, her gaze still foggy but faintly recognizing you. “Oh... it’s you,” she says, her tone somewhere between confusion and amusement. “Huh... didn’t expect that.”

She yawns, burying her face in your shoulder again. “Whatever... you’re warm. I’ll just stay here.”

“Such a good pillow,” she murmurs, her voice fading as sleep overtakes her again.

The thumping bass of upbeat music reverberates through the apartment, mingling with the sound of laughter, clinking glasses, and the occasional cheer or shout. The living room is packed with people—mostly Rika and Kiyomi’s friends—all dressed in outfits that barely count as clothing, given the heat of the summer and the party’s loose atmosphere. The air is thick with the scent of alcohol, perfume, and faint traces of sweat as the crowd moves and mingles.

You step into your room, the faint hope of escaping the chaos dashed as you take in the scene before you. A group of women, most of them strangers, are sprawled across your bed, passed out in various poses. One has her arm draped over the side, a glittery crop top hanging loosely off her shoulder. Another is curled up against the headboard, still holding an empty glass, her heels kicked off onto the floor.

In the living room, the chaos is somehow even more overwhelming. Rika, in the middle of it all, is perched on the armrest of the couch, laughing with a group of cheerleader-types who are barely holding onto their drinks. She’s dressed in a dangerously short skirt and a halter top that leaves little to the imagination, her silver ponytail swishing as she leans back, clearly enjoying the energy of the room.

“Hey! There he is!” she calls out when she spots you, her lavender eyes lighting up with mischief. She waves you over, a drink in hand and her voice just a little too loud, clearly a few glasses in.

Before you can respond, one of the girls turns to look at you, her bleary eyes widening. “Wait... is this Kiyo's little brother?” she slurs, giggling as she nudges Rika. “He’s cute!”

Across the room, Kiyomi is leaning against the kitchen counter, chatting with a group of slightly older women, most of whom have the polished, self-assured air of seasoned party-goers. Their laughter rings out as they toast to something you can’t hear over the noise. Kiyomi catches your eye and gives you a small wave, her cheeks slightly flushed but her demeanor composed.

You try to navigate through the crowded apartment, dodging a stumbling woman in a leopard-print dress who nearly spills her drink on you. One of the other girls sprawled on the couch whistles as you pass by, her gaze lingering a little too long before she collapses into a fit of laughter with her friends.

“Having fun yet?” Rika teases as you finally reach her. She hands you an unopened bottle, her grin wide and unapologetic. “You should loosen up a bit, little bro. It’s not every day you get a house full of beauties like this. You’re welcome, by the way.”