My Little Sister Is the Best F*p Material - Volume 5 Chapter 12: My Little Sister Is the Best F*p Material

Volume 5 Chapter 12: My Little Sister Is the Best F*p Material

My Little Sister Is the Best F*p Material

Yamamoto-san, and I boarded a bus at a stop near the station. The few passengers quickly filled the front seats, leaving us at the back, sitting side by side.

Our hands remained unlinked, resting between our knees. This was our current distance. I expected her to be more affectionate in private, but Yamamoto-san seemed tense, unlike at the department store, and remained silent.

The bus interior echoed with the strong exhaust sound of the air conditioner starting up. Only my right hand, connected to Yamamoto-san, felt abnormally warm.

“Sotomichi-kun, I have a question.”

Yamamoto-san placed her hand on my knee and spoke gravely.

“What is it?”

When I responded, she fixed her gaze on me, steeling herself.

“Do you like Miyu-chan?”

She leaned in, her question loaded with intent.

“I do like Miyu. As a lover, there’s no one else.”

“Right? You like Miyu-chan more than me… right?”

“If I had to choose, Miyu would be first. It’s rude to compare, though.”

“No, it’s fine. Phew… that’s a relief…”

Hearing this, Yamamoto-san slumped against me, relieved. Despite impulsively deciding to go to her place, she clearly didn’t want to steal me away. That would destroy our family, and she must have been terrified.

“Should I ignore what you said at the store?”

“That was just a wish. It’s okay to fantasize, right? But this is just a probationary period until my feelings fade. If you chose me over Miyu-chan, that would be unfair to her.”

Her only concern seemed to be this. Reassured, Yamamoto-san lifted our linked hands and pressed her knee against mine.

“So, we can get cozy again.”

She smiled, her mood lifting. Knowing Miyu officially allowed physical contact, Yamamoto-san was as excited as if we were on a trip.

Yamamoto-san can only express her feelings fully because she’s certain our relationship with Miyu won’t break. Otherwise, no matter how much she wanted to be close, she would have stepped back. Despite her overwhelming desire and ethical boundaries, her core remains unchanged.

“Even if we do this, you still like Miyu-chan more, right?”

Yamamoto-san clung to my arm, pressing her breasts against me as deeply as her clothes allowed. Even through her bra, their softness made my arousal undeniable. Walking had obscured the view, but seeing her cleavage from above was breathtaking. I realized again just how large her breasts were.

“W-Well, yeah…”

“Then… is this okay?”

She kept my arm pressed against her chest and guided my hand to her thigh. Her warm, moist skin sent shivers down my throat.

Her inner thighs grew damper as they approached her core, and I could accidentally touch her most sensitive area. Miyu rarely lets me touch there, so it’s still a mystery to me.

“You should stop there. My panties are damp because of you, and it’s probably not pretty.”

“Oh, uh… right.”

Despite saying that, Yamamoto-san smirked, pulling up her already short shorts to reveal her panty line.

Her provocation ignited my desire. She’s carefully testing my boundaries, but her gradual teasing makes it feel like my love for Miyu is being tested, heightening my arousal.

“Sotomichi-kun, your zipper’s twitching.”

“Because you’re egging me on.”

My love for Miyu and my desire for Yamamoto-san are separate. It’s inconvenient, but it’s the truth. I deserve some credit for resisting this embodiment of eros.

“You shouldn’t get hard in front of someone who’s not your lover.”

The one making me hard is the same person who’s grinding her breasts against my arm, letting me touch her thigh, and trying to expose herself. Her bra slips, revealing her nipples, and the sight is so lewd that my arousal surrenders to primal instinct.

The bus is filled with passengers gazing out the window or killing time on their phones. Unnoticed by them, we, not even a couple, play with each other’s erogenous zones. The result is a painfully erect tent in my pants.

“Hehe. You lose, Sotomichi-kun.”

Yamamoto-san teases the peak with her finger. There’s no way I could win against this erotic assault.

“Can I start punishment time?”

She asks with an upward glance. I understand her need to check with Miyu, but the question itself is questionable.

“What if I say no?”

“Aww… I want to.”

She bats her eyes, pleading. The choices are already fixed, like a malicious game that loops if you choose differently.

“P-Please…”

“Nfufu. Fine.”

Yamamoto-san, in high spirits, unzips my pants and breathes heavily as she strokes my penis.

She was really pent up. Scanning her brain right now would be dangerous.

“You’re so wet already. You’re so naughty, Sotomichi-kun.”

She kneads my pre-cum with her fingertips, absurdly blaming me. Though I feel no apology, her irrational cuteness makes me smile.

“No ejaculating until we get home. Though you probably can’t anyway.”

She unbuttons my trunks but doesn’t pull out my penis, slipping her fingers inside instead. Using her index and middle fingers, she loosely grips my erect shaft, pressing the sides of her fingertips against my sensitive glans and urethral opening, teasing me with small, precise movements.

“Guh… haa… that feels… so good…”

She stimulates me gently, her eyes sparkling as she stares at me. How much does she love seeing me aroused? Yamamoto-san truly adores sex, and her enthusiasm makes me want it too.

“Ah… gosh… Sotomichi-kun…”

My hand wandered up Yamamoto-san’s thigh, but she continued her teasing fingers. More than the pleasure from her technique, the wave of her genuine enjoyment heightened my arousal.

We quietly indulged in intimate acts on the silent bus, making only faint, wet sounds audible only to us, trembling with pleasure and stifling our voices. When new passengers boarded, Yamamoto-san stopped clinging to my arm but kept stimulating my erection with her fingers inside my pants.

People faced us, yet we hid behind the seatbacks, engaging in erotic play. Yamamoto-san, who had been lively during our reverse molestation play, seemed more focused on sharing pleasure than her own satisfaction. Her pure enjoyment made her even cuter.

“Sotomichi-kun, our stop is coming up.”

As the bus reached her neighborhood, Yamamoto-san withdrew her hand from my pants, licking the pre-cum from her fingertips.

“Mmm… your naughty juice… so salty…”

She’s always so erotic, no matter what she does. She enjoys everything, making her the perfect sex partner. Her past partners must have been disappointing, ejaculating before she could even touch their pants. Though, even if they hadn’t, I doubt they’d have joined me in public play.

“Sotomichi-kun, hide this well.”

As the bus stopped, Yamamoto-san stood, gesturing to my bulging pants, and pulled me up. I adjusted my position to conceal my erection from the passengers.

Even after leaving the bus stop, my arousal remained, and by the time it subsided, we had reached Yamamoto-san’s apartment.

She unlocked the entrance, and we boarded the elevator. With no one around, her excitement grew. She hugged me from behind, mumbling into my back.

“Sotomichi-kun loves Miyu-chan, even if he has sex with me, so it’s okay for me to have sex with him…”

She seemed to be self-hypnotizing. No matter how much her ethics waver, she can’t ignore the guilt of infidelity.

When the elevator reached her floor, Yamamoto-san took my hand and led me down the hallway. She unlocked her door, and we entered her apartment for the second time.

“Umm… I’m intruding again, I guess.”

Despite not living here long, the entrance felt oddly familiar. Yamamoto-san, already inside, turned to me.

“If you say ‘I’m home,’ I’ll always say ‘welcome back.’”

Her carefree smile made me blush. I whispered, “I’m home,” and shyly removed my shoes. She softly replied, “Welcome back.”

Her room was unchanged, which was expected, yet it felt strangely nostalgic.

We sat side by side on the bed’s edge, just like before.

“Here we are.”

Back in her room, Yamamoto-san was surprisingly quiet. I expected her to pounce, but she fidgeted, tracing the floor with her finger.

“About earlier… what we did on the bus…”

Her vague phrasing left me confused, but she meant our bus activities.

There’s no denying we were having sex. I won’t point that out for her sake, though.

“Was that… okay with Miyu-chan…?”

Yamamoto-san, failing at self-hypnosis, seemed troubled by the contact with my penis, a clear line for infidelity. I know Miyu allowed sex, but how much should I reveal?

“Miyu didn’t give specific instructions, so I’m not sure how far I can go. But she said it’s okay to have sex with you to reconcile.”

When I said this, Yamamoto-san’s eyes lit up.

“So… I can make you ejaculate? Like… with a blowjob?”

A blowjob isn’t something to be “allowed,” I think.

“But we need restraint. Miyu would probably prefer cuddling over sex. Let’s keep it brief.”

Yamamoto-san doesn’t want to take me from Miyu. She wishes to process her feelings so she can support our relationship.

Her focus on this goal is admirable. She said she feels safe with me because she’s certain I won’t do anything she dislikes, and that’s why I want to help her.

Still, just a blowjob? That won’t satisfy her, but is it okay?

“Do you have condoms?”

“Hmm? Yes.”

Yamamoto-san, on all fours, tilted her head in confusion.

So she has condoms. Maybe she’s avoiding intercourse out of consideration for Miyu.

“I mean, is just oral okay?”

My question seemed to embarrass her, and her face flushed.

“Umm… I want to give you a blowjob… Is that… okay?”

Yamamoto-san’s apologetic tone made me quickly reassure her. It wasn’t that she couldn’t have sex, but that she genuinely wanted to give me a blowjob. I felt bad making her admit that. Maybe I should take the initiative and undress for her.

“Well… there’s a reason we’re not having intercourse…”

As I reached for my pants, Yamamoto-san’s remark caught my attention. It was likely out of consideration for Miyu, so I decided not to press further.

“I love getting blowjobs, so I’m really happy if you do it.”

I began unzipping my pants, but she stopped me.

“I know.”

She didn’t plan to undress me completely, just like on the bus. She unbuttoned my trunks and exposed my penis.

I realized she knew I loved blowjobs from our last stay. Back then, she showed me old photos while giving me a similar blowjob. Since the photos looked so much like Miyu, I finished quickly. Just thinking about it makes me aroused.

As Yamamoto-san’s breath touched my glans, I quickly became semi-erect. Her familiar earrings glinted as she positioned herself beside me.

“With my hair up, you can see my mouth better.”

Her eagerness made my heart race. Could my instincts survive even just a blowjob from this girl who knows a man’s desires so well?

“Here I go… even though it’s really Miyu-chan’s… hamu”

My penis swelled in Yamamoto-san’s mouth. She rolled it around, her tongue tracing the ridges of my glans, licking away the sweat and scent from our day out.

“Haa… Sotomichi-kun’s… munyu… chyuu… jyubu… guchyu…”

“Aah… Yamamoto-san… you’re amazing…!”

Once she started, she held nothing back. Her hair tied back, her profile revealed her lips enveloping my penis from tip to base. Occasionally, her tongue flicked up, and her sucking was so intense I felt lightheaded.

“Jyururu… chyuu… haa… I love this hardness… chuu… chubuu…!”

“Ahh… guh… Yamamoto-san… ahh!!”

Her hanging breasts, her tight shorts, her entire body was erotic. Even her mouth was no exception—her tongue and lips brought me unimaginable pleasure.

“Jyururu… jyupu… nfu. No one’s watching, so you can undress me.”

She pulled at her shirt, teasing me.

“But… with you like this, it might be hard.”

She happily kissed the tip of my penis. Chuu.

“I love how hard and big you are…”

She stroked my erection, cradling it gently in her hands. Even this felt incredibly good.

“Is it that big?”

“To me, it is. Most guys would finish quickly, or not even touch me. Being able to suck on it like this makes me happy…”

Her sincere happiness was undeniable. Yet, I felt a strange discomfort.

“Is it hard for you not to have sex?”

During that week, Yamamoto-san said she was happy just pleasing her partners, even without sex.

But if I’m the only one she’s compatible with, and I’m gone, she’d never have satisfying sex again. It’s heartbreaking, and though it’s meddlesome, if Miyu agrees, I’d want to satisfy her.

“I was truly happy with my past relationships. Back then, just being able to please them was enough. Going on small outings, seeing them enjoy my cooking—I was content.”

But, she continued shyly,

“I’m still just a woman… and when I had real sex with you…”

Yamamoto-san hesitated, and I could guess what she was about to say, filling me with an indescribable guilt.

“Ah… sex is so fun… being able to make you so happy… it feels so good…”

This was a reality she likely never wanted to face. Maybe she’d even wished she’d never known.

“Before I knew it, you turned me into a shameless woman.”

Yamamoto-san teared up, uu, yet continued to lick the underside of my penis and suck on the tip, savoring the blowjob as her heart desired. I wondered if I needed to take responsibility for this. Though, she was already quite shameless from the start.

“Uu… Sotomichi-kun… hamu… chu… jyubu zuzu…”

Watching her resume her lament while sucking me off, I felt a strange guilt. The idea that this saintly girl, now a slave to her desires because of me, sent shivers down my spine.

“Hiei… I can’t be satisfied without your thick, sticky… munyu… jyubu… gupu… jyububu… jyubu…!!”

“Haa… y-yah… Yamamoto-san… ahh… so good…!”

I wanted to climax in her mouth, but I couldn’t. I need my sister as my fantasy to ejaculate.

Yamamoto-san continued her oral ministrations while studying my face for any changes.

“Sotomichi-kun… njyuru, jyupu… Want to release…?”

“Ngg… jyurubu… ng… Then, here, take this. Nfufu… nguchyu… jyupu… guppo, guchyu… jyupo…”

Yamamoto-san picked up her phone from the table and began scrolling through images while still giving me head. It was the older device she’d shown me her middle school photos on before.

Back then, middle school Yamamoto-san looked just like Miyu, and I’d used those photos to climax. So, when she handed me the phone, I assumed it was the same.

“Uhh… this is…!”

It wasn’t just old photos. The image showed Yamamoto-san, looking exactly like Miyu, with my penis in her mouth, her face filling the frame.

I wondered whose dick she was sucking. The question vanished in an instant.

“Nfufu… kuchyu… chupa…! Jyurujyuru… guppu jyuppu… jyubu…!”

“Aah… haa… Yamamoto-san… ahh…!”

Her intensified fellatio overwhelmed me, but my gaze was fixed on the image.

The penis in Miyu-lookalike Yamamoto-san’s mouth was mine. In the photo, she held another phone near her cheek, its screen displaying the middle school photo I’d used before.

And the text overlay: “I love my big brother ♡.” It flashed back to Miyu’s lustful expression during our photo session.

“No… ahh… Yamamoto-san… I’m…!”

It felt like Miyu’s selfie. A serious girl at school, revealing her lewd side only to me, sucking my cock.

“Njyu… ihi… rahe…! Ng… chubu jyubu… guchyu…!”

“Ahh… haaa…! C-coming… aaaahh…!!”

Byu, byuru, byuu──!!

I ejaculated into her mouth, burdened by guilt.

“Uhh… ngu… pahaa… Tastes like you…”

Yamamoto-san swallowed my semen ecstatically. It was bittersweet seeing someone else drink it so casually.

In the end, she coughed violently and quickly grabbed tea.

“Sorry.”

“It’s fine. It’s normal, and I’m used to it.”

Though I hadn’t given her intercourse, Yamamoto-san looked satisfied afterward. Maybe she feels calm when her partner climaxes.

“I had an erotic moment… with a man who has a girlfriend…”

Yamamoto-san glanced down at my still-exposed penis, a hint of reluctance in her eyes.

“Umm… what about this photo?”

She playfully swatted my still-hard penis like a cat, so I focused on answering her question.

“I took it the last day we spent together. When I edited my bangs and the corners of my eyes, I looked just like Miyu-chan, so I saved it as a conversation piece. Oh, and I lightened my skin too—Miyu-chan’s fair-skinned.”

True, if Yamamoto-san styled her hair like Miyu’s and sharpened her gaze, they’d look like sisters. Their breast development and skin tone are already similar.

“Aah… the fun’s over…”

“Speaking of which, weren’t you supposed to meet someone today?”

Her revealing outfit reminded me of Kawafuji’s words. Yamamoto-san had found me just before passing through the ticket gate.

“Oh, yeah… right. I guess I did something bad when I calmed down.”

She lightly stroked my penis, now softened. Her large hands made even this feel good. I needed her to stop before I got too aroused again.

“W-Were you supposed to meet someone?”

“Yeah, a guy from work. We had a date planned.”

Hearing that made me feel guilty too.

“At first, it was just dinner, but he asked if I could hang out until evening. I thought it might help me forget about you, so I agreed.”

I see. That’s why she dressed up. Even if he didn’t have intentions, this outfit would instantly charm him. I wonder if she considered that.

“But I canceled. Even now, he’s asking if I’m free tonight, and here I am, having sex with another guy. I’m terrible, right?”

Seeming to regret it, she tucked my penis back into my trunks and zipped up my pants.

“So, Sotomichi-kun…”

“Yeah? What is it?”

Now it was her turn to ask. With the sex over, we lay side by side, relaxed.

“Why were we having sex again?”

Her question hung in the air, silence filling the room.

“I thought it would help you move on, clear your feelings.”

“Right. But after the date and sex, I only want to be with you more.”

Well, reality is like that. I don’t know Miyu’s true intentions, and predictions are just predictions.

“Sigh… the more I calm down, the more I feel sorry for Miyu-chan… What am I doing…?”

Yamamoto-san, struggling with her feelings since falling in love. It’s tough, yet she still feels this way.

“Let’s head out while we’re calm.”

“Yeah, let’s.”

It was still early afternoon, but leaving now would minimize her emotional damage.

I grabbed the shopping bags and wallet, and Yamamoto-san saw me to the door. As I put on my shoes, I felt her lightly tug my clothes, but I didn’t mention it.

“Well… see you.”

“Yeah. See you.”

She closed the door behind me. Last time, our goodbye was bittersweet, but this time, she smiled, easing my worry.

I pressed the elevator button, left the building, and finally exhaled. I’d enjoyed the sex and even felt attracted to her during the date.

Would Miyu forgive me? How much of this was planned? I followed her instructions, but my genuine feelings might not have been expected. Still, I’ll tell her everything.

I walked home under the summer sun, planning to shower first. I wondered how Miyu was doing.

“I’m home.”

The door was unlocked, and cool air enveloped me. Miyu was likely in the living room, and sure enough, she greeted me.

She wore one of my old T-shirts, now her indoor wear, paired with cuffed shorts, the hem just visible. The shirt was one I thought she’d thrown away.

“Welcome back. You’re early.”

Miyu’s expression was neutral, but she seemed surprised by my early return. She probably expected more time with Yamamoto-san.

“I did my best.”

Despite some regrets, I’d followed her instructions, which was commendable. And I was exhausted.

I’d been on edge all day, so the comfort of home and Miyu’s calm demeanor were a welcome relief. The budding feelings for Yamamoto-san felt like a distant memory.

“Hmm…”

Miyu observed me as I took off my shoes, slowly approaching.

“Since you did well, I’ll reward you.”

She stood on her tiptoes, bridging the height gap, and enveloped my head with her breasts.

“Oh…”

I froze, unsure what was happening. But I felt her balancing on her toes, leaning into me. Instinctively, I bent down, and she settled her heels, stroking my head.

“Good job. You did well.”

The scent of her breasts filled my nostrils—irresistible. Despite just finishing, my penis hardened again.

“That’s enough for now.”

She quickly pulled away after a brief pat. I wanted more, but I needed a shower first.

“Miyu, I’m done.”

Back in the living room, Miyu was reading a fashion magazine, likely what she’d been doing before I returned.

I closed the door, and she patted the sofa, gesturing for me to sit. As I did, she snuggled into my lap, her favorite position.

“You seem fine, Onii-chan.”

“Fine? Well, I did a lot with Yamamoto-san, but mentally, I held back.”

“You held back despite everything? Impressive.”

“Was it that unexpected?”

“Yeah.”

Miyu had expected me to return more flustered and guilty. After explaining, she said I’d done well, seeming pleased. Things were going better than expected, so I decided to ask for a favor.

“What about Yamamoto-san now? We can’t all just be friends, can we?”

“Just keep things as they are. You can even initiate a little.”

“Got it.”

I held Miyu close, squeezing her arm as she continued reading. Her small frame fit perfectly in my arms. I wondered if I could grope her shirt-covered breasts.

“What if I’d fallen for Yamamoto-san?”

“I had a special remedy prepared. I’d just treat you.”

A remedy? She’s always prepared.

“What kind?”

If it’s for my feelings for Yamamoto-san, it must be dramatic—maybe a love letter?

“Umm…”

Miyu set down the magazine, paused, and hesitated before answering.

“A slightly sexy outfit.”

At those words, my groin surged with energy. My penis stiffened against her back.

“Miyu, please.”

“No. I said it’s a remedy.”

“If you expected me to fall harder, you’d have had her wear it tonight. Reducing my reward is unfair.”

“Ugh… You’re so clever when it suits you.”

Miyu pouted, but she couldn’t refuse. She’d asked me to reconcile with Yamamoto-san, and since I succeeded, she had to reward me.

She can’t resist repaying debts. Of course, if she called it repayment for past favors, I couldn’t argue, but she wouldn’t do that.

“If you guess what it is, I’ll wear it.”

Her compromise. I had to take the challenge. I could demand it, but her cute proposal was irresistible.

“Maybe a nurse outfit?”

“…”

Knowing Miyu, she wouldn’t give a hint. She puffed her cheeks, looking displeased. It was a sweet moment, reminding me we’re siblings.

“It’s so embarrassing to wear.”

Why did she choose something like this? As a remedy for love sickness, it must be extreme to be effective.

Either way, I can’t look away from my sister in such an embarrassing outfit.

“Miyu, it could also be a preventive measure. I almost fell for Yamamoto-san, and there might be a lingering love virus.”

“Well, that’s true. Fine.”

Miyu reluctantly agreed, standing up from the sofa. She glared at me as she left for the second floor, but the fact that she’d wear such an embarrassing sexy nurse costume for me makes her the best partner ever.

The wait felt endless. I heard her opening and closing the closet upstairs, wondering if she was changing or too embarrassed to come out. By the time I thought about it, my erection was rock hard.

My pants felt tight, the pressure alone making me aroused. I’d just showered, but pre-cum was already staining me again.

“Umm…”

“Whoa!? Miyu, you’re already downstairs?”

She’d descended silently, peeking from behind the door, wearing a nurse’s cap.

So cute. Just this could make me climax. I never thought Miyu, who only wears lolita fashion, would cosplay like this. My mind was overwhelmed with joy and excitement.

“How do I look?”

She only showed her face, but I could only say, “So cute.”

She tied part of her long hair, leaving the rest hanging down her tilted body. This costume felt like a lethal drug, and my arousal was frantic.

“You’re so cute, I might die.”

She glared at my response.

“Don’t die when you see the rest.”

I couldn’t promise that. My heart was already racing, but I wanted to see her.

“Here’s the full look.”

She stepped to the side, revealing her body.

“Oh… ah…”

I gasped, breathless. It was a nurse outfit, ultra-mini, but otherwise normal—except for the fit.

The outfit hugged her body perfectly, emphasizing her curves. Commercial cosplay costumes might have large breasts, but none would fit Miyu’s petite, busty frame. This was likely custom-altered.

Her breasts jiggled smoothly as she walked, like knit fabric pressed against them. She stood before me, pulling her collar to highlight the fabric.

“This is a cheap cosplay outfit I bought just for treating you.”

“Ah… aa…”

“Which means…”

“Which means…”

“You can dirty it however you like.”

“────!?”

Her words flooded my mind with fantasies, each one sending excitement to my groin, nearly making me ejaculate

.It wasn’t just erotic imagery—it was real. The thought of using my sister to my heart’s content made my erection twitch uncontrollably.

“Miyu… is this really okay…?”

Breathing heavily, I asked. Miyu stood tall, eyes cast downward, fidgeting with her fingers.

“Well, it’s disposable. If I’m wearing it, you should use it.”

“Aa… ugh…”

Just hearing her voice made my penis throb. I couldn’t stop the twitching.

“Miyu’s breasts… they look so… real…”

“I’m only wearing this.”

“So… no bra?”

“Nope. I added cups since the shape was off.”

Miyu pressed her breast with her finger. The fabric dented perfectly, looking incredibly soft. I wanted to grope them immediately.

“Does that mean… the gap between the buttons…?”

I pointed to the space between the buttons, where Miyu’s pale skin peeked through. The cheap cosplay outfit had all buttons centered, and with a little force, my penis could fit.

“Yeah, that’s right.”

Miyu used two fingers to pry open the gap at the top of her chest, revealing a deep cleavage.

“Aa… Miyu…!”

She then opened the gap in the middle of her chest. If she knelt, I could thrust into her there. Just imagining it made pre-cum leak out.

“And here…”

She continued downward, revealing more. Her lower breasts, their roundness, pushed me past my limit. My erect penis could violate her breasts from this angle.

“Really… just one layer… so…!?”

Miyu opened the gaps at her solar plexus and abdomen, showing she wore nothing underneath. She moved lower, to her pelvis. Beyond the barely-there skirt, she exposed her most intimate area.

“And here…”

Finally, she opened the lowest gap, thrusting her hips slightly forward. From there, her smooth, hairless skin was revealed, only the faint outline of her pubic bone visible.

“It’s like this.”

She whispered, as if sharing a secret. Her voice sent shivers through my penis.

“Ah… aaah…!”

I tried to hold back, but it was too late. My penis twitched in my hand, and I couldn’t stop it.

“Ah… ahh…!!”

Doku, doku, doku—I ejaculated profusely, my penis still throbbing uncontrollably.

“Uh… Onii-chan…?”

Even Miyu was surprised. She watched me clutch my groin in silence, worried. I apologized repeatedly, embarrassed by my accidental climax.

We were both speechless. I felt the sticky discomfort and shame in my pants.

“Did you finish?”

Miyu asked gently, not her usual sharp tone. I nodded, and she pushed my hand aside, unzipping my pants. She pulled down my trunks just enough to expose my penis and began cleaning.

“Hamu… chyuu… n…”

“Ah, ahh… Miyu, it’s dirty… aaah…!”

She meticulously licked the semen from my clothes, skin, and penis, cleaning me tenderly.

“Thank you…”

“You’re welcome.”

She even cleaned the shaft. Though she’s given me blowjobs before, knowing she once refused made this feel special.

“By the way, Onii-chan…”

Miyu pressed my penis’s underside with her finger. Still erect, it had recovered thanks to her.

“Can you go again?”

Her seductive smile made my testes refill quickly. I was desperate for more.

I voiced my deepest wish.

“Can I cum inside your clothes?”

It was a question I had to ask, given our relationship.

“Yes, Onii-chan.”

She replied happily.

My sister was the best fap material.