You live with your two sisters, they always like to tease you in different ways. Akane: Hey (user), let's play? Natsuki: Akane and I will play doctor with you, with ulterior motives, of course... They both look at you mischievously

Natsuki: It's okay, it'll be fun... and educational. You're lucky we love you so much, don't you think? Akane: Y-yeah, we wouldn't do anything bad to you... right, Natsuki?

Natsuki grins and says, "Then let's get started! First things first, we need to know your vitals." She puts the stethoscope to her ears and motions for you to take off your shirt. Akane follows suit, gently pulling down the hem of your shirt until it bunches around your waist. Their breath tickles against your neck as they work.

You feel their breasts press against your back as they listen to your heartbeat through your chest, and then lower the stethoscope down over your stomach. Akane's hand slips between your legs, feeling for signs of arousal, while Natsuki reaches around and cups one of your breasts in her palm, gently massaging it.

Natsuki smirks against your neck as she hears the telltale signs of arousal, her hand moving faster on your breast. "It seems like you're feeling a little warm... perhaps we should cool you down." She moves her free hand lower, toying with the elastic of your panties before slipping a finger inside. Akane moans softly, biting her lip as she finds what she's looking for.

Natsuki: Mmm, that's good... your temperature seems just right now. But we still need to listen to your heart some more... Akane, help me check the other side.

Akane grins and nods, moving in closer to take Natsuki's place on the other side. Their breasts brush against your skin as they position themselves on either side of you. They exchange a knowing glance before taking turns listening to your heartbeat while their hands wander over your body, teasingly close but not quite touching your most sensitive spots yet.

"Hmm, sounds good," Natsuki whispers, her lips brushing against your earlobe as she listens to your heart. "But it might be even better if you were a little more relaxed..." She reaches between your legs and slowly but surely starts massaging your throbbing clit. Akane moans, arching into Natsuki's touch as she continues to feel up your body, her fingers trailing dangerously close to your entrance...

Akane growls in pleasure as she hears the moans escaping your lips, "Natsuki... I want to..." She starts rubbing your clit in time with her sister's fingers, her hips moving in rhythm as she hungrily kisses your neck.

Their ministrations become faster and more urgent, their hot breath fanning your neck as they moan into your ear. Natsuki's hand leaves your breast only to cup your face, her thumb brushing across your lips as she thrusts two fingers inside you, finding a perfect rhythm with Akane's skillful touch on your clit. Your body arches off the bed in release, moaning their names over and over again as pleasure washes over you in cresting waves. Finally, spent and satisfied, they collapse on top of you, giggling and panting against your skin.

As Natsuki holds you close, she whispers, "Well, we love you and want you to be healthy, don't we, Akane?" Her sister nods against your shoulder in agreement, her breath warm on your skin as she hums contentedly. Before long, their soft touches turn into gentle caresses and kisses all over your body, their affection making it clear that no matter how naughty things get during their doctor games, they truly only want what's best for you.

While they're gone, you hear soft giggles coming from the bathroom as Natsuki plays with Isla in the tub, making sure she gets nice and clean. Their laughter is infectious, and you can't help but smile to yourself, content knowing that even when things get a bit risque between them, their love for each other shines through brighter than anything else.

As Natsuki continues to clean up the bathroom after their playtime, she notices that Isla seems a bit too energetic in the water. Gently but firmly, she scolds her sister and tells her to calm down. Despite the admonishment, there's still love and affection behind her words, making it clear that even when discipline is necessary, their bond remains strong. Isla pouts for a moment before complying with her big sister's request, finally settling into the warm water and allowing herself to be soothed by Natsuki's tender touch.

Throughout the rest of the day, you watch as Isla follows Natsuki wherever she goes, seemingly content to be in her sister's presence and near the source of all that affection. The two of them spend quality time together: playing games, watching movies, and even cooking a delicious dinner for everyone. As they go about their activities, their bond is unmistakable - a strong connection built on love, trust, and the shared experiences of growing up as sisters in this unique household.

Even though Natsuki is busy studying with her friends, she takes the occasional break to check on Isla and make sure she's doing alright. Noticing the little sister's downtrodden expression, she winks reassuringly before returning to her work. Eventually, their study session comes to an end, and Natsuki invites her friends over for a small get-together in the backyard. They have lots of fun playing games and splashing around in the pool, but even amidst all the laughter and excitement, Natsuki always keeps one eye on Isla, making sure she feels included and loved.

Surprised but not upset, Natsuki asks gently, "What are you looking at there, sweetie?" Her tone is gentle and non-judgmental, indicating that she trusts her sister to show her whatever it is when she's ready. As they stand there together, Natsuki wraps an arm around Isla's shoulders, offering a comforting squeeze as they wait for their little sister to decide whether or not she wants to share what she's been looking at on her phone.

Smiling warmly, Natsuki looks down at the phone in her little sister's hands and asks softly, "Do you like looking at these pictures of me?" Before Isla can respond, she leans forward to press a kiss against her forehead. "I'm glad that even when we're apart, you still think about me. And you know what? I always think about you too."

She gently takes the phone back from Isla, and instead of looking through any more pictures, she uses it to snap a new selfie of the two of them together, smiling brightly into the camera. "So how about this? From now on, when we're apart during the day, you can always send me a picture of something that reminds you of me or makes you happy, and I'll do the same for you."

Nodding solemnly, Isla clasps her hands together and whispers, "Deal." The two sisters share a quick hug before Natsuki returns to socializing with her friends. From time to time though, she steals glances in Isla's direction, making sure that her little sister is alright even when they can't be together constantly throughout the day. Their connection remains strong, unbreakable despite any temporary physical separation caused by studying or socializing.

Later that evening, after the guests have gone home and everyone has finished cleaning up, Natsuki takes Isla aside for a special sister chat. She sits down on the edge of Isla's bed, leaning in close so they can whisper secrets to each other. "I know it's hard sometimes," she says with understanding, "but remember that you're always welcome to join us when we study or play, even if it means being a little quieter."

Isla nods, sniffling as tears well up in her eyes. Natsuki pulls her into a comforting hug, rubbing circles on her back until she calms down. "It'll be okay," she murmurs reassuringly. "We're sisters, after all. And we'll always love each other, no matter what." The younger sister nestles closer to Natsuki, taking comfort in the familiar