My Little Sister Is the Best F*p Material - Volume 7 Chapter 07: A Date with My Lover

Volume 7 Chapter 07: A Date with My Lover

It wasn’t brilliantly sunny, but for summer, it was pleasantly cool—perfect date weather. I couldn’t ask for more with Miyu. A flawless overcast sky.

“Finally, our first date,” Miyu said, gazing out the train window. She wore a rare open-neck shirt and a skirt short enough to show plenty of knee. Watching her from behind, I noted the distinct curve from her waist to her hips, wondering if girls with big chests also have big butts. Her straight hair today brushed against her rear.

“Finally,” I echoed.

We’d shopped for clothes before, which I considered a date back then, but this was our first real one as a couple.

The train ride took an hour. The aquarium, in a relatively urban area, wasn’t huge but was surrounded by shops, making it a perfect spot for a day trip since the aquarium alone couldn’t fill a whole day.

At the station, many disembarked. Miyu’s small frame could get lost in the crowd, so we naturally held hands as we walked. Her hand was much smaller than Yamamoto-san’s, sparking a mix of protectiveness and a sense of duty as the older one—more brotherly than romantic, though.

“Have you held hands with Haruka while walking?” I asked.

“Why?”

“Just wondering how used you are to this.”

“I’m used to being pulled along.”

Miyu trailed half a step behind, looking up at me. With Yuka or Haruka, she’d be the one dragged. Unlike Yamamoto-san, who sticks close in any situation, holding hands with Miyu felt necessary, almost inevitable.

“I don’t know how to enjoy aquariums. Is it okay if I’m not fish-savvy?”

Unlike amusement parks, this place focused on observation, and I wasn’t sure how to approach it. I’d researched famous creatures during my downtime, but I wasn’t confident I could identify them.

“The key to enjoying an aquarium is going with someone you’re close to,” Miyu said calmly, letting me lead her. We exited the station, crossed a wide pedestrian bridge, and followed signs to the aquarium.

“That’s pretty straightforward… Not good if you’re not dating?”

“There are people you’d have fun just walking an unfamiliar town with, right? It’s a place that makes those moments even better.”

“I see.”

For us, who mostly just fooled around at home, this was ideal.

“Most date spots are like that, though.”

True, like the hot springs we planned next. Even at a ryokan with great baths or food, you’d want someone you can relax with in the room. Sharing the little things matters.

“It’s pretty crowded.”

The ticket counter had over a hundred people in multiple lines. My experience with live events kept me unfazed, though.

“I booked online, so we can enter with a code,” Miyu said, showing me her reservation screen.

“Reliable as always.”

She’s seasoned at this, moving smoothly. I want to lead as the guy, but no rush—let’s enjoy today.

Inside, the dim lighting and air-conditioned coolness enveloped us. I expected a tank of fish swarms at the entrance, but instead, a three-meter seal statue—mascot of the aquarium—stood in an open space, with a photo line formed.

“What’s that?”

“The aquarium’s mascot, Big Seal-kun.”

“Big Seal-kun.”

“A one-tenth scale statue.”

“The original’s way too huge.”

That sleekly stylized statue must’ve cost a fortune.

“Those are usually at entrances. After touring, you can buy printed photos or digital files.”

“Not free, huh?”

“About two thousand yen, usually.”

“Pricey!”

“‘It’s a precious memory,’ they say, and it feels cheap.”

Right. A precious memory.

“Looks like the shoot itself is free.”

Our first date with Miyu—a memory worth capturing.

“Wanna take one?”

“Let’s do it.”

Miyu agreed easily, so we joined the photo line. Taking a picture with her feels like it’s been since family photos. What expression should I make?

“Next, please.”

After fifteen minutes, our turn came. The staff, pros at this, saw we were a reserved couple and brought a huggable stuffed toy, suggesting we pose with it. Smart—no awkward poses needed, and we could stay close naturally.

The issue was our expressions. Surprisingly, Miyu looked troubled, asking, “What face should I make?” We hadn’t acted couple-y since leaving home, and being told to pose as lovers stumped us. We’re the type who suck at public affection.

Still, people waited behind us, and dawdling risked a random snap. My brotherly brain sparked.

“Miyu, hold the stuffed toy. Pretend you’re shooting with Haruka—smile at the camera.”

She got it instantly, hugging the shrimp plush and flashing a cute, sidelong smile. Click. I stood behind, giving a slight wry grin, subtly resting a hand on her waist. We both managed smiles, but it wasn’t very couple-like. It’s us, though, so good enough.

“Penguins first, huh?”

“Not fish?”

Moving through, we first saw beaked, bipedal creatures. Some lounged on rocks like a meeting, others dipped in and out of the water.

“Urban aquariums often start with mostly fish, but this dedicated facility puts land animals near the entrance.”

Aquariums vary in display tactics. Deeper in, we saw fish from movies, edible crustaceans, then jellyfish and deep-sea creatures as the water deepened. Blacklights gave the space a mystical vibe.

“Up close, a lot of fish have funny faces.”

“Right? With girlfriends, you just call them ‘cute’ or ‘gross’ and have fun.”

“Jealous…”

Guys can’t do that. This place isn’t for big groups of dudes my age. The crowd—mostly families—was lively but refined, perfect for a chill couple’s outing.

(But this…)

I glanced at Miyu beside me. We’re just… normally touring the aquarium. Like siblings leaving the house.

Unlike with Yamamoto-san, I didn’t feel others’ stares, pride in my partner, or restless excitement. It’s the same mundane time as at home. Is this really a lover’s date?

Maybe we’re not flirty enough. A guy initiating feels weird, so I need to nudge Miyu to say, “I love you, Onii-chan.”

“This looks like the biggest tank.”

The largest tank was the most popular spot, with crowds lingering to admire it. Rays glided below, while sharks and sardines swam above, a chaotic mix of species. A low platform allowed close-up views, a higher one offered a full perspective, and the railing between was packed with people.

Initially too crowded to approach, we watched from afar until a gap opened. Perfect—just enough space for one, so a couple squeezing in wouldn’t look odd. The dim lighting kept us discreet.

“These tanks always have sharks and small fish swimming together. I’ve always wondered why they don’t eat each other.”

“Wanna look it up?”

“Nah, it’s kinda better as a mystery.”

“Fair. Everyone enjoys things differently.”

As we talked, I subtly hugged Miyu from behind, savoring her slender, soft body. Her familiar scent and warmth grounded me, finally making her presence real.

Miyu noticed the sudden intimacy, glancing up while gripping the railing. Without a word, perhaps sensing my need for closeness, she faced forward again.

We watched the tank like that, her softness under my hands tempting me to graze her chest, just shy of groping. She turned, staring intently.

Which is it?

Her unspoken question hung there. “Not like that…” I mumbled. Satisfied, she faced the tank again. Breasts aren’t just sexual—they’re inexplicably captivating to touch.

Then, Miyu tugged my arms inward, signaling she wanted more contact. I tightened my embrace, but it wasn’t enough. She pushed her hips back repeatedly, urging me to hold her harder. I pressed my whole body against her, intensifying the closeness, then boldly squeezed her so tight her lungs might’ve collapsed, hands gripping her breasts.

She seemed to struggle but showed no resistance—proof this intensity was right. Miyu’s into this, isn’t she?

“That’s one way to enjoy it,” I said, easing up.

She took deep breaths, turning with a smug, satisfied look.

“We’re a couple, after all.”

Our sneaky flirting transformed the aquarium. As we left the railing, a distinct couple’s bubble formed around us. Skinship is powerful—I finally felt like her lover.

But, frustratingly, my libido ignited. Three days without Miyu’s relief, thanks to Yamamoto-san’s visit, made me overly sensitive. This could make me seem like I’m only in it for sex. Stay calm, stay calm.

“Just the outdoor zone left,” I said.

“Usually where otters are,” Miyu replied.

Light filtered into the dim corridor, and an automatic door opened to a lush open garden, like a small zoo. As Miyu said, small-clawed otters scurried through overhead pipes, drawing young visitors’ cameras. A popular animal, apparently. This open space might cool my lust.

With pure intentions, I strolled with Miyu, interacting with turtles and rabbits, then bought our photo and left. The framed picture went into Miyu’s pouch, digital data to be downloaded later—my first public photo with her.

Next was the spa, a comprehensive entertainment facility with dining and rock baths alongside hot springs. At reception, we got wristbands with IC chips doubling as locker keys, then changed into yukatas in the changing rooms.

Wearing a yukata for the first time, I worried about getting it right, but my toned body—thanks to recent events—looked decent in the mirror. Outside, Miyu waited, poised in a pink yukata, hands clasped.

“Sorry for the wait. You’re as cute as I expected.”

“You’re supposed to say more than expected.”

“Oh, my bad.”

My lack of dating savvy showed again. Eroge knowledge is useless here.

“You look good too, Onii-chan. Nice body,” she said, smacking my abs, then linking arms as we walked. She’d guide me through the facility first.

Her sidelocks swayed, her usually sharp eyes sparkling with joy. I felt genuinely glad to give her this date. My sister’s adorable.

Unfamiliar with such places, I was awed by the relaxation area’s rows of sofa chairs and the buffet’s beer server. Someday, I want to pour pints with Miyu. If this were a ryokan, we’d return to our room tipsy, barely shedding our yukatas before…

(No. Calm down. No dirty thoughts.)

I squeezed my eyes shut, banishing the fantasy. Miyu’s yukata was to blame. The thin fabric revealed her chest’s swell, and her breasts felt more direct against my arm. These factors stoked my desire indirectly.

Still, Miyu said she brought a wire-free bra to minimize visibility, underscoring her chest’s size. I couldn’t help wanting to strip her.

“Don’t get hard in the bath, Onii-chan.”

“I won’t.”

Thinking of her while soaking could turn me into a pervert with a public boner. The yukata would show any erection, so no sexy thoughts here.

That’s fine. Obsessing over sex would reduce us to a physical relationship. We need to act like lovers, like boyfriend and girlfriend.

“There’s a reservation-only private room here. If you can’t hold back, we can go there,” Miyu said, dropping a bombshell just as I vowed to stay calm.

“No way there’s something like that.”

“It’s summer vacation, so it’s probably booked…”

Checking the website, it was packed, as expected. But miraculously, a one-hour rest slot was open.

“Seriously? In this season?”

“Last-minute cancellations happen.”

“Really? Should we book it? It’s three hours from now.”

“If you want, go ahead.”

She passed the ball to me. Booking it might scream “I just want sex.”

But a rare private room at a hot spring is a precious memory. The schedule was booked solid for two weeks—impossible to plan for.

“I booked it. Wanna eat before the bath?”

“Sure, I’m hungry.”

We headed to the food court for Japanese food, ordering matching sashimi sets. Sitting across, we chatted, ate delicious food, and relaxed. Using a tatami area, Miyu joined me afterward, and we napped side by side.

Other couples napped too, so we didn’t stand out. Miyu’s sleeping face was adorable, and stroking her head made her sleep more comfortably, doubling my affection. This is my girlfriend.

(Still, it’s just…)

Miyu is my ideal girlfriend, the charming little sister I dreamed of since my eroge days—nothing more to wish for. Today’s date was fun, and my love for her was unquestionable.

That’s why I could no longer ignore the truth.

(Calling Miyu my girlfriend feels… resistant somehow.)

I’d brushed it off as a linguistic issue, avoiding the unease of labeling her that way. Despite our public claim of being exclusive lovers, I rarely called Miyu my girlfriend. The definition of “girlfriend” didn’t quite align with what Miyu was to me.

My love for her was undeniable, but if I’m honest, when picturing my “ideal girlfriend,” Yamamoto-san came to mind.

(Could this be it?)

If Yamamoto-san’s talk of choosing between her and Miyu pointed to this hesitation, it’s a critical issue to resolve.

“Shall we head to the bath?” Miyu asked, waking from a short nap.

“Yeah, my feet are tired from the aquarium.”

We parted for the baths. It’s a shame couples can’t bathe together here. A ryokan with private open-air baths might allow mixed bathing—Miyu probably knows a good one. We’d definitely end up doing something naughty, though.

“Haa…”

After showering, I soaked in a circular cypress tub, resuming my thoughts. Miyu and I are always physical when intimate. I don’t dislike our dynamic—it makes her indulgence in sex adorable. Our current closeness isn’t bad, but it lacks that “girlfriend vibe.”

(Does a “girlfriend vibe” even exist?)

My brain was exhausted from overthinking, risking ruining our first date.

Today, I’ll be myself. Miyu’s open to sex, and she’s been pent-up too, so she’s probably eager. It’s her first day free for creampies. She’ll love me unloading inside her raw. Her primal side will be thrilled.

I want raw sex soon. Creampying my sister—the ultimate brotherly bliss. Who cares about girlfriend vibes? I can creampie my cute, busty sister, and if she’s okay with it, we can try it in the spa’s private room.

Or maybe she’d prefer our first creampie on my bed. That’s possible. Then the private room would be just a blowjob. Still fine—sex with Miyu outside home is rare. Three days’ worth of thick semen for her to drink. I want to feed it to her now.

“No, calm down, what am I doing?”

I scolded myself quietly, steadying my nerves. I got hard in a public bath, despite Miyu’s warning, just from wanting to creampie her.

Knees up to hide my erection, I waited for it to subside before leaving. I want sex with Miyu, but it’s over two hours away. Deep breaths. I’ll rejoin her soon—no slip-ups.

“Feel refreshed?” Miyu asked, her hair tied up post-bath. Updos highlight her stunning face, contrasting her petite frame—a true Yamato Nadeshiko.

“Sweaty and clean now.”

Too much blood flow, honestly. How to kill time until the private room?

“Wanna try the rock bath? I’ve heard of it but don’t know what it’s like.”

“Let’s go. It’s the only thing left.”

I led Miyu to the rock bath area. Suddenly, eyes seemed to turn toward her. With many women bare-faced, Miyu’s beauty stood out. But other couples’ girlfriends were gorgeous too.

“Even without makeup, there are lots of cute girls.”

“That’s the ‘natural makeup’ you guys love,” Miyu said.

“What? They’re wearing makeup?”

“No one goes bare-faced in public, especially not with their boyfriend.”

“Right…”

Following her tip, I checked eyes and brows—subtle artificial traces. Their skin was heavily whitened, apparently. If it looks cute, makeup’s a win.

“Are you wearing any?”

“Not much. My usual makeup’s light.”

“Got it.”

She’s still young. I notice makeup when she goes out, but rarely at home. My sister’s always cute.

“Lucky your sister’s bare face is adorable,” she whispered smugly, snuggling close.

“Y-Yeah.”

She reads my mind instantly. A great base is ideal—she’s cute in the bath or bed.

“Two hours from now, you’re alone with this adorable sister.”

“Stop hyping me up.”

Her words fueled my excitement. I had to keep my lower half in check.

But she’s right—I’m set to get lovey-dovey with this stunning, post-bath beauty. Eat your hearts out, guys.

Thinking spitefully, I noticed eyes on us, like with Yamamoto-san. My arousal since the aquarium’s end seemed to spark Miyu’s flirty aura, her love radiating. Everyone envies a girl’s affection.

“Onii-chan, two spots are open there.”

“Let’s start there.”

Rock baths were divided by effects. The blue-lit room we entered relaxed muscles, perfect for my lingering soreness.

“It’s pretty hard,” I said, lying on the heated stone.

“That’s rock bathing.”

We spread blankets and lay down, separated by a partition—Miyu deeper in, me closer to the entrance.

My body warmed from within, aiding recovery. The hard pillow was a downside.

(How’s Miyu doing?)

The quiet left little to do but sleep. Curious, I sat up to check.

(Hmm… this is…)

Her breasts, weighed by gravity, peeked from her yukata’s gap—not much, just cleavage, but I didn’t want other guys seeing. The group opposite was all women, so Miyu likely knew it was safe, but it bugged me. I gently covered her chest.

Relieved, I lay back, wishing time would pass. This is a date—I should savor every second, but why am I so sex-driven?

This feels no different from outdoor sex with Yamamoto-san. That was fine—she’s not my girlfriend. But with Miyu, it’s a problem. Even without a girlfriend vibe, we can’t just be fuckbuddies. That’d erase my reason for choosing her over Yamamoto-san.

(Time to shift perspective.)

What kind of boyfriend does Miyu want? Does she see me as one? Does she wish I’d be dependable, leading confidently on dates?

I ruminated over past interactions with Miyu and Yamamoto-san, landing on one answer: Miyu has no specific demands. I’m fine as is. That never changed.

So, is the girlfriend vibe irrelevant? Asking myself, “It’s okay without it” felt right, but also irresponsible.

Here’s the crux: girlfriend vibes don’t matter. That resonates. Yet, we’re boyfriend and girlfriend, a fact I can’t ignore. This dissonance—if I resolve it, my hesitation vanishes. I’ll focus on this alone. It might clarify my stance with Yamamoto-san too.

“Onii-chan, how much longer?”

“I was thinking of leaving soon. Let’s hit the open spots, rinse off the sweat, and rest until our slot.”

We made the most of the rock baths, feeling rejuvenated, then wrapped up. After another bath to wash off the sweat, we headed to the relaxation area to chill.

Sadly, it was packed. A few chairs were free, but none side by side. The reclining sofa chairs, perfect for TV watching, were a hot commodity.

“The nap area’s open,” Miyu said.

“Let’s go there.”

A section of the relaxation area had tatami mats with neatly arranged straw pillows, about two tennis courts in size. It was sparsely occupied.

Most people preferred the low-temperature sauna nearby. Miyu and I chose a spot far from the entrance, with fewer people, and lay down. She removed her hair clip, letting her long hair fall. Hidden pink extensions blended with her glossy black hair, matching her pale pink yukata—a modern yet refined beauty lounging beside me. Japanese style is sexy.

“Still thirty minutes,” Miyu said, scooting closer, her warm body’s heat palpable. Some couples hugged openly while napping, so we wouldn’t stand out, but touching her in public was thrilling.

“Resting to use the private room feels weird,” I said.

That’s how vital private spaces are for couples. “Being alone together” carries infinite value for humanity.

“As if you plan to rest,” Miyu teased, slipping a finger into my yukata’s gap, loosening the chest fold. She’s right—I’m just waiting to have sex. She must feel the same.

“Aren’t you looking forward to it too?”

I mirrored her, sliding a finger into her yukata’s chest, pulling it open. My fingertip grazed soft, bare skin.

“No inner layer…?”

She wore the yukata directly over her underwear, no T-shirt. My heart raced, body heating up.

“I thought about skipping the bra too, but my nipples would show,” she said, covering her chest, lifting her ample breasts. This sister’s too erotic.

“Kanade-san would’ve gone all out,” I said.

“She totally would.”

“I can’t go that far, so please forgive me with this…”

“More than enough.”

Peering into her yukata, I was transfixed by the valley of flesh. Her defenseless attire made me want to pounce.

“Can I touch your stomach?”

“Uh… ah… nn…”

I slipped my hand inside, savoring her silky skin. She squirmed, her sultry moans—ticklish or aroused—stoking my lust further.

“Perverted Onii-chan,” she said, her moist eyes piercing my fetish with simple words. My boxers were soaked with precum, risking staining the yukata. How do I stand with this erection? But that didn’t matter—messing with her under the yukata was insanely arousing.

“Don’t touch too rough, or it’ll come undone,” she warned.

“…Sorry, got carried away.”

I withdrew my hand, fixing her collar to cover her skin. The loosened obi left the yukata disheveled.

Every moment, Miyu was erotic. My heart pounded like it was striking my ribs. I needed to vent, or I’d do something shameless.

“You’ve been pent-up. Must be tough,” she said, lightly tracing my erection through the yukata with her nail, fueling my near-breaking desire in this no-release state.

“You’re suffering too, right? You want it,” I said.

Her flushed cheeks softened, hesitating before confessing.

“As long as Onii-chan desires me, I’m happy.”

I’d heard that before. For her, nothing trumped that when it came to sex.

“Erotic sister.”

Acting aloof but turning lewd for her brother—a hopeless, brother-obsessed, lustful sister. Wanting payback, I slipped my hand under her yukata, flicking the small bud under her panties with my nail.

“Nn… ah…!!”

Her loud moan startled us both, and we shrank in panic. It wasn’t as loud as we feared—Miyu held back—but we froze, scared of drawing eyes.

“O-Onii-chan…”

She tugged my clothes with her fingertips, glaring reproachfully. I bravely checked around—no one looked our way. The nearest girls didn’t start whispering, so her moan hadn’t registered.

“Didn’t expect you to feel it that much from a light rub,” I said.

“Ugh… shut up. It’s just how my body is,” she said, pulling her yukata to cover her crotch.

“How long until the room’s free?”

“Barely any time has passed.”

“What a tease…”

I wanted to feel her skin with my whole body and have her soothe my erection. More private couple spaces should exist.

This spot’s near the wall, shielded by Miyu’s back. “Sucking your breasts here might not get noticed,” I said.

“No way. Do you know how hard it is to stifle moans?”

“Maybe… with your effort…”

I needed something to sate my brain’s craving for sexual reward.

“Right, Miyu, can you take off your panties?”

“What? Why?”

“Don’t look so horrified.

“You taking them off here would thrill me to death.”

“I respect your perverted honesty, but that leaves me panty-less.”

“I want to see my shy sister in a naughty state.”

“What a thing to say to your real sister.”

Still, I gazed at her expectantly. No touching, no playing with her parts—so it’s not sex.

“No way… that’s a bit…” She fidgeted, rubbing her thighs, hinting at a serious reason.

“Without them, my juices would drip while walking.”

She pressed her crotch, eyes darting, worried about her love juices staining the floor. For someone who gets wet fast during naughty moments, it’s a big deal.

I couldn’t let her keep them on. My excitement was uncontrollable. Without some satisfaction, I’d do something reckless.

“It just needs to not leak, right?”

My mind raced at breakneck speed. A brother evolves endlessly to do naughty things with his sister.

“Miyu, it’s fine. Even without panties, we can manage.”

“Really?”

“Yeah. Trust your brother and take them off.”

“That request already sounds untrustworthy.”

Still, she checked for prying eyes with a glance, and I nodded to confirm no one was looking. Slipping her hands under her yukata, she skillfully bent and stretched her legs without moving her upper body, sliding her panties off and grabbing them with her toes.

“I-I took them off,” she said, avoiding my gaze, shyly hiding the panties in her yukata, confirming her panty-less state.

“Then give them to me first.”

“Nope, they’re going in my pouch.”

“What…?”

Such a stingy sister after all that. I wasn’t planning anything weird.

“At least let me touch them for a moment. I want to feel your warmth.”

“Ugh… fine.”

Ensuring no one behind saw, she exposed her pale pink panties at a low angle, letting me touch them. Her recent pink hair extensions seemed to inspire a matching color obsession.

“Wow… so warm…”

“Your sister was wearing them until just now.”

“I want to cum in them already.”

“No way, that’s a waste,” she said, stashing them in her pouch. She knew I’d been pent-up for three days, so unauthorized release—especially outside her body—was forbidden.

“So, what do I do? You’re not saying I should hold it in while walking, right?”

“Here’s the plan.”

A simple, elegant solution to let Miyu walk panty-less without dripping, preserving the mood.

“I figured you’d have a bandage, Miyu.”

Her perfectly smooth, hairless skin made it ideal. It’s as if she was shaved for this very purpose—a brilliant idea.

“Annoyingly, I do,” she said, hugging herself protectively. “What, you get off on that?”

Encouraging her, I shook her shoulders, pouring out my feelings.

“Hell yeah, I’m thrilled. Just imagining it makes me want to burst.”

I understood her skepticism. Visually, it’s erotic, but a bandage alone isn’t that exciting.

But this was different. The bandage would mark Miyu going panty-less in a public bath and prevent leaks—a profoundly sexy role. That passion, conveyed through my fervent confession, surely reached her.

“It’s in your pouch, right?”

“In the makeup mini-bag.”

She revealed its location despite her reluctance, signaling her willingness.

“Found it. Can I put it on?”

“No way, you’d touch me. And I’m not showing it.”

What a stubborn sister. Her fierce eyes grew more intense, but knowing she’d apply it to her crotch was erotic enough, so I let it slide.

I handed her the bandage. She tried wiping herself with a tissue first, realizing it was embarrassing to do herself.

“Don’t stare so much.”

It’s like being watched after using the toilet—humiliating.

“Should I do it?”

“N-No, I’ll manage.”

Awkwardly, she adjusted her yukata to hide her actions, wiping her juices. Peeling one side of the bandage, she reached down again.

“Nn… here, maybe…?”

Fumbling for her slit, too shy to be precise under my gaze, she hastily applied it. As she adjusted to peel the other side, I intervened.

“Let me at least do one end.”

“Ugh… fine.”

Yielding to her beloved brother’s plea, she reluctantly guided my hand to the bandage’s edge.

“I really love this side of you, Miyu.”

“Not now…”

Her shy delight was adorable. I carefully applied the bandage, and when the final strip peeled off, an indescribable sense of achievement and joy enveloped me.

“Just to check, is the slit covered?”

“U-Uh, yeah…”

I traced the bandage, ensuring no grooves remained at the edges.

“Nn… it’s… weird…”

Feeling her sensitive spot through the bandage must differ from a condom’s sensation.

“Can I see it?”

“I said no.”

No means no. But imagining Miyu with a bandage down there was thrilling, likely fueling future fantasies. Spotting more bandages in her mini-bag, another idea struck.

“With these, you could go topless too.”

“How much do you want to strip your sister?”

She’d worn a bra to avoid nipple outlines. Covering them with bandages would let her go braless under the yukata. Removing bra straps required undressing, so that wish went unfulfilled.

“How many minutes left? When can I have sex with you?”

“Less than ten. It’s almost time with travel.”

Miyu fidgeted, her anticipation clear. I wasn’t the only one desperate.

“You want it bad too, right?”

“…Yeah.”

Forced to be honest, I sought one last touch. She didn’t resist as I traced her bandaged slit with my left hand and slipped my right into her bra, teasing her hardened nipple while groping.

“Nn… ha… Onii-chan…”

Her hot breaths escaped, and when a moan nearly slipped, she clamped her mouth. Unable to move excessively to avoid suspicion, her helpless submission was the sexiest thing ever.

“Miyu, I can finish inside in the room, right?”

No holding back once alone. Foreplay’s done—I want to thrust in the second the door closes.

“Y-Yeah, you’re so pent-up.”

I can pour semen into her raw vagina, marking her lewd body with my seed.

“For this milestone, should I shoot as deep as possible, right at your womb?”

“Ugh… that sounds… really risky…”

Miyu turns primal when I nudge her cervix. Raw insertion, with our parts kissing and semen flooding in, could unleash her raw, erotic sister side.

I still wanted to. Confidence surged from my instincts, assuring me we’d handle the aftermath.

“I’ll make it so unforgettable, I’ll unload everything.”

I pulled her close, subtly rubbing my exposed penis against her stomach. Her vagina pulsed, possibly climaxing right then.

“Be gentle…”

With Miyu’s erotic switch flipped, we endured the final thirty minutes. When time came, we stumbled eagerly to the private room for passionate raw sex.