The Story of How Producing My Timid Older Sister Developed My Sexual Preferences

Chapter 023: (Is this something you do at a beauty salon?)

Today is the long-awaited haircut day for my sister.

Since my school ended earlier, I waited for her return while organizing an album of hairstyle data that would suit my sister, based on the ones I’d already collected.

Yesterday, when I got home, I gave her my thoughts on the bento she made while she was practicing makeup. She got all excited and said “I-I’ll make it for you anytime!” but it feels like things might escalate again…

Mom had to teach her many times, but she still couldn’t do it well and was on the verge of tears. As a last resort, she seems to have learned a very simplified “Natural Makeup Beginner” version with many steps cut out.

I heard the front door open. Looks like my sister is back.

“I’m home… I’ll get ready quickly.”

“Welcome back! We still have time, so take it easy.”

She must have rushed home in this heat — her neck was sweaty and she was breathing heavily.

“Ah, thanks. I’ll take a quick shower first.”

She spun around and hurried off. The scent she left behind was thicker than usual. It was milky and creamy, but I think it’s coconut. Mixed with something like peach.

Why does she smell even better when she’s sweaty? This is increasing the possibility that my sister isn’t human, but an angel. No, seriously — how can she smell like that without wearing perfume? I should look it up later.

‘Sweat coconut smell’

There it is… It’s called “SWEET odor,” a body scent that young women naturally have. It’s caused by a component called lactone.

So she really is human… and I was just ignorant.

After her shower, my sister sat on the floor with her back against the sofa in her usual loungewear and started doing her makeup.

“D-Don’t watch…”

She noticed me staring and glared at me shyly. She turned her back to me and continued.

I struggled to hold back my laughter at her serious expression reflected in the mirror.

Ah… Our eyes met through the mirror.

“Mouu! S-Stop iiit!”

“Sorry! I won’t look anymore.”

I shouldn’t tease her any more while she’s genuinely trying to improve herself. I suppressed the mischievous urge welling up inside me and started preparing myself too.

My sister stood in front of me once I was ready. She looked unsure.

“D-Does it look weird…?”

“Not weird at all. You look cute.”

“……!”

Her skin was smoother than usual, and her pink lips looked adorable. The outfit she was wearing — which made her cheeks turn pink at my compliment — was probably one she bought with Mom recently. A black thin pleated skirt, a black-and-white striped T-shirt, and a long moss-green gilet on top. As expected of Mom’s taste — it’s pretty fashionable.

Ah, she’s putting on those lame glasses… What a waste.

“Shall we go?”

“…Yeah.”

The two of us left the house and walked side by side.

This feeling again. It feels very nostalgic. How many years has it been since I last walked outside with my sister like this?

It feels kind of itchy and awkward, so we both fell silent.

“…You always smell like lactone, Sis.”

“！！？… Nooo, what is thaaat?”

I used my newly acquired knowledge to tease her as a cover for my embarrassment. She quickly moved away from me and hugged her own body.

“It’s a nice smell.”

“Uuu… Teru-kun, lately you’ve been… somewha——”

“If you start talking about my smell, I’m just gonna run ahead.”

“—Why!? Uuu… You’re always so mean…”

I reflexively countered her surprise counterattack from a blind spot with weather-sensing Jr.-level intuition and reaction speed.

I had just forgotten one thing though…

We arrived at the beauty salon.

It seems this is my sister’s first time here. It’s open late and is apparently Mom’s favorite salon because she’s so busy.

Seeing my nervous sister made me nervous too. A high school brother accompanying his university sister to get her hair cut does feel a bit strange. But we’ve come this far, so there’s no turning back.

For some reason, I ended up entering the salon first.

“Hello—”

“…”

“Welcome!”

“Ah, we have a reservation under Shimizu.”

“Oh, Shimizu-san! I heard your daughter was coming. Is this your boyfriend accompanying you?”

The stylish blonde woman who looked about 30 casually dropped a bomb. Well, people wouldn’t normally assume a little brother is tagging along.

“No, he’s—”

“H-He’s my little brother…”

My sister interrupted me and denied it in an unusually loud voice. Her ending words became tiny and inaudible… but being denied so strongly actually hurt a little.

“Ah, I see. You two are close!”

“…Yes.”

This time, when answering the staff, my sister looked happy, fidgeting with her hands and smiling shyly. What’s going on in her head?

I’ll never understand what’s inside my sister’s mind even if I studied it for a lifetime, so I continued talking with the beautician.

“My sister isn’t very knowledgeable about hair, so I thought I’d explain…”

“I see. Please have a seat over here.”

I sat down in the assigned seat with my still-fidgeting sister.

“What kind of style would you like?”

“As you can see, she has this natural perm. Can you do something like the person in this video?”

The beautician looked back and forth between my phone screen and my sister’s head. My sister looked extremely uncomfortable even though she hadn’t even sat at the cutting station yet.

“Ah, yes, we can do that. Though I recommend a hair repair treatment as well.”

“…But today’s reservation was only for a cut, right?”

“The treatment is available today. Would you like it?”

“Yes, please. We want this kind of atmosphere, so I’ll leave the details to you. My sister has the same photo too.”

Everything was decided while I was the only one talking. The beautician barely made eye contact with my sister. With her years of customer service experience, she must have instantly understood what kind of person my sister is.

“Understood. Then big sister, please come this way.”

My sister was led to the cutting station looking anxious and timid. She glanced back at me worriedly, as if asking me to wait for her there.

“We’ll take your glasses for now.”

“Y-Yes.”

“Let’s take a look at your hair. Wow, I heard from your mother, but you really are beautiful.”

“….”

While having her hair lifted by the beautician, my sister blushed at the compliment. Her voice was too quiet for me to hear from here, but she was probably denying it.

As expected of my sister. See? She has great taste, doesn’t she? I felt strangely proud while watching with a mysterious gaze.

“If you’d be willing to be a cut model, we can make today’s entire service free. How about it?”

“…”

“It would just be posting the finished look on Instagram. Is that no good?”

“…I can’t…”

Hey, that’s such a waste! If it were me, I’d happily say yes! (Not that anyone would ever ask me…)

“You should do it, be a cut model.”

“…”

Suddenly attacked by the person she thought was her ally, my sister turned around with upturned eyes. She was probably trying to glare at me.

“I won’t force you… Then we’ll wet your hair over there first…”

“Yes…”

While I was wondering what to do with myself, another staff member brought a drink menu.

“Thank you. I’ll have iced tea. Ah, do you know roughly how long it will take?”

“Let’s see… With cut and treatment, probably around 2 hours.”

“I-I see, thank you.”

2 hours!? No way! Two hours is impossible. If I had a book I could manage, but with only two or three magazines, I wouldn’t last even 10 minutes.

I started regretting casually saying I’d come along. I want to go wander outside, but my sister might cry later and accuse me of betraying her…

I opened my phone to kill time. There were more message notifications.

Aah… It’s Kaede-chan again. I thought about blocking her, but I noticed she sent pictures.

Curious… For some reason, my perverted sensor reacted. Should I look…? I swallowed hard and checked behind me to make sure there was no mirror.

Okay…

・Doesn’t this swimsuit look weird?

(Photo)

Holy shit, isn’t this super erotic!?

Kaede-chan in a black bikini, reflected in a full-length mirror. She really doesn’t look like a middle school first-year at all. The fabric crossing under her bust. The ribs visible in the gap look strangely sensual. Her chest must be around D-cup. She’s slim with glossy skin. There’s no way this is a middle schooler…

・It looks good on you. Are you really in 1st year middle school?

・I’m glad ♡ It’s a secret ♡

…H-Hmm, a secret huh. I see. So there’s a possibility she’s not actually in middle school. Yeah, yeah… In that case, it should be fine, right? No problem at all, right? There’s no way that body belongs to a 1st year middle schooler. Yep.

I actively used confirmation bias as a convenient brain function. Then the usually quiet sexual harassment old man inside me came out and tried to take over the cockpit of this body.

・Ehh, a secret makes me even more curious~. Your chest is big so I thought that might be why.

・Is it really that big?

(Photo)

・Yeah it’s big. Your legs are so long too, I’m surprised.

・I’m happy ♡ Are my thighs too thick?

(Photo)

More and more erotic photos kept coming. Even the sexual harassment old man was stunned at how little sense of chastity today’s girls have. Kaede-chan’s puberty is running wild.

For her own sake, I should probably give her a strict talking-to. This is way too dangerous.

・What about the back view?

Chapter 024: A Little Brother with a Beautiful, Outstanding Sister with Superior Genes

I was looking forward to the completed form, so I tried my best not to look at my sister too much.

While reading a gourmet magazine, I continued messaging back and forth with Kaede-chan. We even made plans to hang out… Her technique was so skillful that I started worrying she might actually be a recruiter for shady part-time jobs.

Holding back my hunger, I was registering the delicious-looking restaurants from the magazine into my phone’s map when there was movement on my sister’s side.

An hour and a half had passed, and it was finally time to rinse out the treatment. All that was left was drying and styling.

I called out from behind my sister, whose hair had just been rinsed and was now being towel-dried as she swayed her head unsteadily.

“Make sure you listen properly to how to dry it and style it, okay?”

“U-Uh, yeah.”

“Then I’ll explain while I do it.”

This was the long-awaited escape from that fluffy cotton-candy hair — and it was all thanks to me. There was no way I wasn’t excited. I waited while suppressing my growling stomach, and the moment finally arrived.

“The back looks like this. How is it?”

“Ah, thank you very much…”

“How about it, little brother!? Your big sister is so beautiful it’s almost unfair!!”

Called over by the beautician who was oddly hyped up, I approached my sister. I already knew she would look beautiful, and since I was the one who gathered the reference photos, I had a decent idea of what to expect. Or so I thought——

The sister reflected in the mirror was so beautiful I forgot to breathe——.

Her small head was wrapped in loose, glossy waves that shone brilliantly and rested softly on her shoulders. Her bangs were swept up from the middle, revealing her forehead, then flowing coolly to both sides near her eyes in gentle curves.

She gave off an overwhelming sensuality that made the woman in the reference photo look plain in comparison.

I was so stunned by my sister’s unbelievable transformation that I froze for a moment. I had to say something…

“…It looks really good… I’m impressed by your skills.”

“Thank you! But it’s all because the model is just too perfect! Are you sure you won’t be our cut model? We only need photos!”

“…I can’t…”

“Come on, it’s just photos. You’ll have to buy hair oil and styling products anyway, you know?”

“…..”

“Ah, then we’ll give you the hair oil for free! Please!”

“Uuu… Okay, I understand.”

“Thank you! Please wait a moment!”

My timid sister crumbled under the beautician’s pressure. She glared at me resentfully.

As the beautician passed by me, she whispered “Thank you” in a small voice and disappeared into the back.

“…It’s embarrassing.”

“It’s fine. They’re just taking a few photos.”

Her cheeks were dyed pink, but her expression quickly turned to despair. The beautician returned with her smartphone in hand, bringing three other staff members with her. One of them was even carrying a slightly exaggerated lighting panel.

“Wow— She’s insanely beautiful! This is crazy! Do you do modeling work or anything?”

“This is seriously amazing. It’s definitely going to go viral.”

“…Beautiful.”

“Right? Excuse us then.”

My sister was lit up brightly as the cameras clicked away. Overwhelmed by despair, she didn’t even have time to blush — she froze solid with her eyes open like she had died. If this was intentional, this beautician was a terrifying strategist. I struggled to hold back my laughter.

“Thank you for your cooperation! Ahh, she’s truly gorgeous! Sorry for making you wait so long, little brother. This way please.”

“…”

The beautician rotated the chair to encourage her to leave, but my sister was still frozen like she had been flash-frozen. I couldn’t help but burst out laughing as I brought her back to reality.

“Pffft! H-Hey, Sis, it’s over!”

“…?”

“It’s done, so we’re going to pay.”

“~~~~~~~!?”

Once she regained her senses, my sister turned bright red and walked unsteadily toward the register. She even forgot her glasses…

“Here is your membership card and the hair oil. It’s free, but we stamped your card! Are you okay with the styling products we used today?”

“Yes, please.”

“That will be 2,800 yen.”

“Sis, your card.”

“…H-Here.”

Don’t hand it to me… I took the card and scanned it.

“Thank you very much! Please come again… Next time, how about color? If you model for us, we can do it for free, so please consider it!”

“I-I see. She said, Sis.”

“….”

“W-Well, let’s go. Thank you very much.”

“…Thank you.”

“We look forward to seeing you again!”

Even after leaving the salon, my sister was still in a daze. Even in that state, she looked terrifyingly beautiful.

While thinking “This is bad,” I also felt shy about her shocking transformation and started walking without knowing what to say. Suddenly, she grabbed my hand.

“…Does it not look good on me?”

“Huh?”

I couldn’t understand why she was asking that when anyone could see it looked amazing on her, so I asked back.

“…You didn’t… praise me much.”

“!? N-No, that’s because there were people around and I got embarrassed. It looks insanely good on you.”

“…Really?”

“Yeah. You look unbelievably beautiful.”

“…I’m happy.”

Kuuu——!! Unbearable! I wonder how many little brothers in the world get their emotions shaken this much by their own sister. No, the absolute number of people with a sister this beautiful is too low, so we’ll never get clear data.

…By the way, we’re still walking while holding hands. It feels completely natural.

The slightly cool, soft feeling of my sister’s hand fills me with embarrassment and, for some reason, nostalgia.

I looked around, conscious of the stares. Whoa!? We’re being watched a lot. About one in three people walking by are looking at us — no, looking at my sister. Guys doing double-takes. Even girls telling their friends “Look, look!” and pointing.

“…I forgot my glasses.”

“It’s fine, just throw them away.”

“N-Nooo!”

“Just kidding. I have them. But don’t put them on right now.”

It’s better if she doesn’t wear them now. I also want to keep looking at her face, and if she notices these stares, she’ll probably shrink and become unable to move. Plus… what is this overwhelming sense of superiority!?

Standing next to my sister’s exotic-looking face, plain old me might look like an interpreter, but right now we’re walking hand in hand. Don’t we look like a couple…?

I haven’t done anything, yet my self-esteem is skyrocketing. My brain is starting to mistakenly believe I’m the most superior male.

This is dangerous. What is this feeling? I feel like shouting “Look at me!” while spraying silver glitter on my face.

“I’m hungry. It’s already 8 o’clock.”

“Mom isn’t coming home tonight… so… want to go eat somewhere?”

“Eh!? Awesome! There’s a restaurant from the magazine nearby, let’s go there!”

“Yeah!”

What kind of smile is that? It feels like it’s going to give me arrhythmia. We started walking again.

The temperature of my sister’s tightly gripping hand seemed to have risen a little.

We arrived at the restaurant, but there were three groups waiting in line. Even on the way here we got tons of stares, but now all the couples in front of us turned to look at us at the same time.

Even my sister seemed to notice the gazes this time and quickly hid behind my back.

“Whoa… Did you see that person just now?”

“I-I didn’t see.”

The boyfriend clearly saw but was panicking and trying to cover it up. Yeah, you were staring hard.

Well, your girlfriend isn’t bad, I guess? But compared to my girl… I thought these pathetic thoughts while looking at the women in the couples ahead.

Some guys were staring intensely too.

Hah? The hell you looking at? There’s no way a guy like you could compete. Want to go? My aggression was rising to the point I was mentally threatening them.

I was so full of superiority that I was starting to lose it and genuinely believe I had become the apex male.

This is bad… If this continues, I’ll become ugly not just on the inside but on the outside too.

I slowly turned back to my sister and asked:

“Sis… Do I have orangutan wrinkles on my face…?”

“…?”

Chapter 025: The Night We Can’t Go Back Anymore ☆

After we finished eating and left the restaurant, my sister naturally took my hand again. It was a shame she put those lame glasses back on, but I didn’t say anything because I didn’t want to turn back into an ugly creature.

While walking home, we talked about how delicious the food was and how even my sister might be able to make something similar.

When we got close to the house, I let go of her hand.

“…Why?”

“What do you mean ‘why’… What if the neighbors see us!”

“They’ll just think we’re close siblings…”

“It’s embarrassing!”

We arrived home around 10 PM with my dejected sister.

“Aaah, I’m tired! But we ate out and Sis got even prettier!”

“…Thank you for coming with me.”

“It’s fine. What now? Mom’s not home — should we heat up the bath? Or just take showers?”

“…I’ll heat the bath.”

“Got it. I’ll go change.”

“Okay.”

I was planning to take a quick shower and sleep, but since she was heating the bath, I changed into loungewear and waited in the living room with the TV on.

Then my sister came out of her room and I was stunned. She was wearing the T-shirt I gave her and navy blue short pants. Or rather, the previous pair that had transformed into hotpants because of her massive ass and thick, plump thighs.

She did say she’d wear them when Mom wasn’t home, and I thought I had gently told her it was better not to… Apparently she already forgot what happened two days ago. Though I had also forgotten about it.

Does my sister have no concept of eroticism? I wanted to ask her what she thinks when she sees herself like this. My heart was pounding violently. I was even scared she might have some kind of plan.

“…I heated it up.”

“I-I see. Thanks.”

She sat on the sofa, leaving one person’s space between us — though for some reason she sat closer than usual.

Her long, white legs folded with a soft muchu sound. It was her usual triangle sitting pose, but the destructive power was on another level. Even though I had made up my mind recently, I was already starting to waver. No, I don’t want to become a monkey! I don’t want to become a monkey!

I looked away and tried to distract myself by opening Kaede-chan’s erotic photos. Normally people imagine their mother’s face or something, but I’m different. I fight fire with fire.

…Yeah, I’m calming down. Even though these photos show way more skin than my sister right now, this is far more effective at suppressing my arousal. Cute ass. Totally different from the one next to me… Whoops, can’t look at that.

“…What are you looking at?”

“!? Nothing!”

Because I had been silent for so long, my sister leaned in to peek at my phone. I quickly hid the screen. Our hands touched — her left hand and my right. She gripped mine tightly again. Her cool, soft hand felt so good that I missed the chance to pull away.

“…It made me really happy to hold hands and take a walk with you after so long.”

“…That’s why holding hands inside the house is…”

“Just for today… Is it no good?”

“…”

Is there any guy who could refuse such a cute request from a beauty like this?

My heart felt like it was about to burst. The pounding was so strong my body might have been rocking back and forth, and my vision was faintly shaking. Breathing was getting difficult, and I could hear my own heavy breathing. I smelled my sister’s strong lactone scent again.

I couldn’t take it anymore. Wanting relief from the painful heartbeat and breathing, my body moved on its own and I hugged her.

“……!”

“Nnh…”

She trembled but wrapped her arms around my back.

…It was the same feeling as when I hugged her before. A sense of overwhelming happiness, like our bodies were connecting. But unlike last time, the softness of her body and her stronger sweaty scent didn’t calm me down — they excited me even more.

I wonder what she’s thinking right now. Does she feel the same as me…?

My emotions were running so high I felt like I might cry. Through blurry vision, I looked at her face. So beautiful… My gaze locked onto her soft-looking pink lips. Reflexively, I licked my own dry lips. Just hugging wasn’t enough to ease this pain — I craved mucosal contact.

…Is it okay to do it? No, absolutely not, we’re siblings. But if Sis is okay with it, I’ll act without hesitation.

I couldn’t read any emotion from her eyes looking at me. What kind of face am I making right now? Maybe teary-eyed and desperate.

Give me a hint, a sign. Something like unconsciously licking your lips, or like Shiori slightly pouting hers. I want it so badly. You don’t have to say anything. Just show me that gesture… I’ll take all the blame, so please… What are you thinking right now, Sis———

“…It’s okay.”

“…!”

————I kissed her fiercely, as if devouring her. I pushed her down, climbed on top, and desperately thrust my tongue into her mouth. Tears overflowed for some reason and I tasted salt.

It wasn’t just the mucous membranes that felt good. The sensation of our bare thighs pressing together. Her warmth felt even stronger. It felt so good my head was going crazy.

When I pulled back for air, her longer tongue invaded my mouth and copied my previous movements.

“Nnh… chu… jyuuur———”

A long, intense kiss. At some point my cock had swollen rock-hard and was rubbing against her stomach. She must have noticed long ago. Even innocent Sis should understand what this means. Yet she didn’t stop kissing.

It’s okay now, right? That’s what this means. There’s no way I can hold back. Even if it’s wrong, I don’t care if I die tomorrow.

I wanted to keep kissing forever, but I needed to take off our clothes to connect more deeply. While still kissing, I skillfully removed my pants, then reluctantly pulled away from her lips and slid her short pants and panties down together.

Her huge ass offered some resistance, but she didn’t fight it. Her wider pelvis than mine. Snow-white skin with just a modest patch of chestnut-colored pubic hair. I wanted to look longer, but I moved between her legs and kissed her again so she couldn’t say anything.

“Nnnh! …”

Her removed panties were still caught on her left ankle. I could see the crotch area glistening suspiciously.

The thought that this sister, who looked completely unrelated to sex, was getting excited from kissing me made me so aroused I felt like I could cum from that alone.

I was at my limit. Just as I thought I’d put it in, Sis hugged me tighter and accelerated the kiss. She must have sensed I was about to pull away.

It’s fine. I’ll put it in like this. Without looking at our lower bodies, I pressed my cock against where her secret place should be — but it slipped and slid toward her asshole.

“Nnnhh!”

She moaned while still kissing. An abnormal excitement hit me again. Her sticky love juices coated my glans and the slipperiness alone made my hips go numb.

I tried again. This time I held the shaft with one hand and aimed properly. But I missed again, sliding upward. Still, the sensation of touching her hot folds and frenulum was incredible.

“Nnnnh!!!”

Sis moaned. It felt so good I almost cried out too. Our heavy breathing mixed together on each other’s faces.

Suddenly, Sis removed her right hand from my back. Then — with that soft hand, she gently grasped my cock from below.

She rubbed it against her own slit, coating it with her love juices and my precum, making it slippery. My heated cock was kneaded by her cool fingertips, and her love juices flowed down from the mucous membranes touching my glans. The act was so lewd and unbelievable that I couldn’t hold back and exploded……

“No!! Damn! Ah!!!”

“!!?”

I pulled my lips away and cried out while grabbing my shaft. An terrifying amount of semen spurted onto Sis. It even reached her face. Thick, sticky stains spread across the T-shirt stretched tight over her huge breasts.

My mind went completely white from the pleasure.

“Haa… haa… haa… haa…”

“…”

I knelt between her legs, panting. I felt so pathetic I wanted to cry.

But more than that, my cooling thoughts made my body tremble. What the hell had I done? Once again I lost to my desires, justified myself, and ended up completely crossing the sibling line. I could only stare blankly, speechless.

Sis took off the T-shirt that was stained with my cum. An incredibly large bra supported her breasts. But none of that mattered right now. I wanted to disappear.

“S-Sorry…”

I tried to run away in that state, but she grabbed my arm and pulled me down. The moment I thought I was being embraced by her soft breasts, she suddenly stroked my head.

“It’s okay. It’s fine. Everything’s okay.”

I had no idea what was happening. All I understood was that it felt incredibly nostalgic, comforting, and I couldn’t leave this place.

“There, there. It’s okay. It’s okay, it’s okay.”

Her repeated gentle voice and the sound of her heartbeat. Wrapped in her kind scent and warm body, the trembling finally stopped.

——How much time had passed? I was still burying my face in her chest, unable to look her in the eyes, but I didn’t want to think about what would happen next.

I just wanted to stay here (in her chest) forever. Without eating or drinking, without shitting, just living here like this.

“Teru-kun, shall we take a bath? Big sister will wash you…”

“…”

Is the person hugging me right now really my sister…? She keeps saying things the usual Sis would never say, so it’s starting to scare me a little.

Or maybe because I did something close to rape, her personality broke… I thought that for a second, but it helped me remember. She used to do this for me when I was little. When I had tantrums, she would comfort me like this. Why had I even forgotten such happy memories?

“Come on… let’s go.”

She stopped stroking my head, lifted my upper body, and stood up. Both of us wearing only one piece of clothing on our upper bodies, we held hands and headed to the bathroom.

The swaying of her ass cheeks. When we reached the sink, she took off her bra. Her incredibly heavy-looking breasts were exposed and drooped softly. Her light pink areolas had nipples so big I wanted to suck on them. Even though I had wanted to die from regret just moments ago, I was getting excited again.

“…Don’t stare too much. Come on, arms up.”

“…”

I raised my arms as told and she took my clothes off. She led me into the bathroom, turned on the shower, and checked the temperature while I leaned against the wall.

“I’ll rinse you. You’ve gotten so big.”

Sis crouched in front of my crotch and gently showered my cock, which was covered in various fluids. “Gotten so big” probably meant compared to when I was little, not that it was erect. I felt déjà vu again and immediately understood. She must have washed me like this before.

“…It’s nostalgic… Dad or I used to wash you.”

“…”

“We had to pull back the skin properly so germs wouldn’t get in…”

“…”

“You always said it tickled and ran away right away, Teru-kun. Doesn’t the tip tickle anymore?”

She touched my cock and applied body soap. Her gentle voice whispered, but the feeling of her hand made my recently spent cock grow big again.

“Amazing… It gets this big…? Whoa!? It’s still growing…”

She washed it with stroking motions while lathering. Blood rushed in without hesitation and my cock became fully erect.

“So big… but it’s almost too big, it looks like a cute little animal…”

Sis gave a strange comment about my dick, but it cast a shadow on her face without shrinking at all. Precum was already overflowing from the tip again.

“Ah… No, Teru-kun. I’m washing it but you’re leaking semen again… Do you want to cum again already?”

My cock twitched as if nodding at her use of the word “semen.” Of course I want to.

“Wait a moment.”

Sis quickly washed her own body, then took my hand and left the bathroom. After drying me with a bath towel, she wrapped it around herself, held my hand again, and said:

“Let’s go to big sister’s room.”

“…”

Just imagining what was about to happen made my heartbeat faster than before. But it didn’t hurt anymore. Because I knew for sure that Sis and I were about to become one.

She led me into her room. The wall with the study desk had various sized picture frames. The room was dark with the lights off so I couldn’t see the photos clearly, but it looked stylish like something from a Western movie and felt like it wasn’t my own house.

Above all, the scent of this room. My sister’s scent, which acted like an aphrodisiac to me, filled the room as if incense had been lit.

“…Lie down.”

I lay on her bed in the dark room as instructed. As I lay on my back with my head on the pillow, Sis knelt between my legs and dropped the bath towel.

The beautiful, obscene silhouette of my sister created by the moonlight. A shiver ran down my spine at the light reflecting in her eyes.

She leaned forward, bringing her face close to my cock. Her spine arched flexibly, and her huge ass became visible behind her.

Her breath touched my cock. The lewd sight and sensation made more precum rise.

“I’ll touch it, okay?”

“…”

I just swallowed. Her left hand grasped the base of my throbbing shaft. Seeing the overflowing juices, she whispered happily.

“Amazing… It’s overflowing… I don’t really know how, so I’ll just make it really slippery… Hamuu…”

“Kh…!”

The moment she finished speaking, half of my cock was swallowed into her mouth. I couldn’t help but moan at the suddenness.

I could feel it. Her tongue crawling all over. She sucked me in, moving her lips up and down in small motions while her tongue circled around my shaft, giving me frustratingly pleasant pleasure. Not the kind that urges ejaculation, but a teasing, comfortable pleasure that made my hips melt.

“Kupo, kupo, jyuuur, kupo, kupo, juu.”

She sucked carefully so saliva wouldn’t spill while repeating the up-and-down motion. That pure, beautiful Sis was noisily sucking my cock.

Even in the dark room where I couldn’t see her obscene body clearly, I was so excited my head felt like it would explode.

I want to put it in. I want to become one with her soon.

“…Sis… already…”

“Nnh, jyu, jyuru… You want to enter big sister?”

“Yeah… I can’t hold back anymore…”

“…Then big sister will do it for you… It’s okay…”

Sis rose to her knees, straddled my waist, and spread her slit with her fingers. A wet nechu sound rang out. Just as my tip was about to touch her, I realized something important.

“Wait, Sis — we forgot the condom——”

“It’s okay… Teru-kun doesn’t have to worry about anything… It’s not scary… It’s fine… nnh… ah!”

“Ugh! Sis, it’s going in.”

Her slippery entrance gently touched my glans, clearly about to pry open the tight hole.

“It’s okay… Come inside… Ah, it’s so big… It’s okaaay… Aaaaaah!!!”

“Sis! Ahh! Uwah!?”

After light resistance, my cock was sucked in unbelievably easily. It was devoured as if it had been long awaited… But what is this…? I’ve never felt anything like this…

“Nnnnh! Teru-kun’s all the way insiiide… Nnhaaa…”

She let out a moan so loud I couldn’t believe it came from her, then collapsed onto me. Her soft breasts squished against my chest. I could feel hard points at the center — probably goosebumps all over her body.

But it was inside. The moment I thought I passed the narrow entrance, my glans went through two more tight spots and reached the deepest part. Not in a normal path — my curved penis was forced in the opposite direction toward where her intestines were. The friction was so intense I couldn’t move my hips.

“Teru-kun! Ah, aah! It’s twitching so much! Amazing… It feels so gooood!”

“No! Sis! Don’t move inside! Ugh, kh!?”

Her slippery soft insides strongly squeezed three different spots on my cock while wriggling like another creature was crawling around. I hadn’t even started pistoning yet and the pleasure was this intense. I was losing my mind.

“Ah! Ah! Amazing! This is too much… I’m going crazy! Big sister is going crrrrazy…!”

“Uwaah! This is bad… Don’t move…!”

My words weren’t reaching the already broken Sis. I dug my fingers into her huge ass and tried to lift her slightly so I could pull out.

“Uwaah… What the hell… I can’t pull out.”

“Aaahn! No! Don’t pull out! Something’s coming! Something’s… ah, it’s weird, it’s coooming…!”

Even when I tried to pull out, it wouldn’t budge. It was sucking me so tightly it felt like it would take three times the force used to enter. As if resisting, Sis dropped her hips even more. Normally it should hurt to take it all the way in at first, but her pussy spread vertically with wet sounds as my huge cock sank deeper.

“Sis! If we stay like this, I’ll cum inside…!”

“Uaaaaah! I’m sorry… It feels too good… I’m sorry! Something’s coming! It’s coming! Aaaaah nooo!”

“Uwaa… Please don’t move…”

“Noo! Big sister is… I’m sorryyy… I can’t stop anymore! It’s coming! It’s coming now! It’s cooomiiing!! Something’s… cuuuuummmiiiiiing!!!!!!”

Her voice became increasingly vulgar as her vaginal walls writhed and squeezed my cock. The obscene moans of my sister reaching climax and the milking pressure made something snap in my head. I gave up. I’d cum hard inside her at the end.

I grabbed her huge ass and lifted it slightly, slowly peeling her clinging pussy off. Feeling her insides, I pulled back until the middle of my shaft was exposed, still ready to explode at any moment. Then… I slammed it back in with all my strength.

“Auwah!? Ah! Ah, ga, ugh, ugh, ugh, nooo! Not now! It’s already coming! Nooo… I’m going crrrrazy… I’m going crrrraaaazy!!”

“Guuuh… I’m cumming! I can’t hold it!”

“Aaah! Aaaaaah~! No no no nooo!! I’m going crrrraaazy!! I’m sorry! I’m sooorryyy!? It’s coming agaaaaain!!!”

I couldn’t thrust properly at all. I was about to cum. I thought we’d have more lovey-dovey sex, but what is this? Once inside, her ridiculously lewd pussy made my sister moan like a completely different person, breaking the air with her cries.

She came on her own, so I’ll cum on my own too…

“I’m cumming!! Here it comes, you sow!! Inside! I’m cumming insiiiiiide!!!!!!!”

“It’s heeeeere!! It’s cooooomiiing agaaaaaaaain!!!! Nnh nnh nnh ahhh…”

“Guuuuh… This is insane… Haa… haa… haa…”

Pleasure so strong it rang in my ears. Sis’s insides were moving, trying to squeeze out every last drop of my cum. Amazing — it’s even milking out the semen left in my urethra. For some reason I was strangely calm.

Unlike before, I didn’t fall into depressed post-nut clarity. Probably because adrenaline was pumping like crazy.

Our bodies were stuck together with sweat. Without a doubt, this was the best it had ever felt. I had done it raw once before, but this was completely different. Do pussies really have this much individual difference?

It was different from the sex I had imagined, but happiness still welled up. I hugged my panting sister, who had collapsed on top of me, tightly.

“Uuu… uuuu… I’m sorry… I did it again…”

“Eh!? You’re crying!? S-Sorry, I went too hard at the end, didn’t I? Did it hurt!?”

I thought she was basking in the afterglow, but I was confused when she started crying. Come to think of it, she was a virgin and I had thrust hard at the very end. I came quickly though…

“That’s not it! Big sister wanted to do it for Teru-kun… but I ended up feeling too good again… and did it for myself…”

“What do you mean? It’s fine if both of us feel good, right?”

I didn’t understand what she was saying, but I hugged her tighter so she would stop crying.

“Nooo… Because I’m so lewd… Teru-kun got into an accident… Uuu… Uwaaaaaah!”

Huh? Because Sis is lewd, I got into an accident? The story made no sense and I understood even less.

I thought we could at least be lovey-dovey after sex, but the troublesome version of Sis had returned. For now, I just kept stroking the head of my sobbing sister on top of me. We could talk later.

“It’s okay, Sis. Everything’s fine.”

It’s the complete opposite of earlier.

By the way, my dick is still inside her. It has completely gone soft, but she won’t let go.

I wonder if even guys can buy the pill.