My head was still spinning after Yamamoto-san asked me a strange request, and I stood there stunned in front of the door after arriving home unexpectedly late.
I thought we'd been making eye contact a lot lately, but I didn't know that she was trying to find the right time to be alone with me.
Moreover, the content of her story is also a mystery.
Why do I have to ask Yamamoto-san for a favour?
Why me in the first place?
I don't get it.
I can't help thinking about it.
I want my little sister to be the only one who is mysterious.
"I'm home."
There were no response to my spoken out-of-habit words of coming home.
The door was unlocked, so Miyu should have come home, but I wonder if she's holed up in her room.
As I approach the living room, a faint aroma hits my nostrils.
It's grilled fish.
Judging from the strength of the scent, it must have just been made or in the process of being made.
I guess the timing wasn't right and my voice didn't reach her.
I open the door to the living room and intended to greet myself once again.
I meant to, but my actions were cancelled by that overwhelming sight.
"Mi-Miyu...!?"
I seriously wondered if I should call an ambulance.
Miyu had collapsed.
Lying face down on the sofa.
Moreover, the button of her blouse was opened halfway, revealing her crushed cleavage.
The hem of her camisole was sticking out from her waist, let alone her blouse, and it was unthinkable for Miyu to sleep in such a sloppy outfit.
"Miyu!! Are you okay!?"
I quickly ran up to Miyu and shook her body.
Her back was moving up and down, and breathing sounds could be heard coming from her mouth.
"Uuu..."
It doesn't look like she's unconscious.
It is possible that she was overworked or suffering from heat stroke.
I took out water from the fridge and poured it into a glass, then lowered Miyu's legs and sat her up.
"Guh... unya munya..."
Miyu's eyes were slightly open, feeling exhausted.
I try to support her upper body from behind, but she still can't keep her head steady and stable.
She wasn't having a fever nor sweating. If I were to describe it in one word, she was half-asleep.
"Miyu, what's wrong? I brought some water, are you there?"
When I asked, Miyu shook her head as if she could understand.
What dominated my brain at this moment was anxiety and fear.
As a result, things that I normally wouldn't think about came to mind.
Maybe she was attacked by a thug.
Maybe she was bullied at school.
At the end, I thought that she might have been bitten by an insect that had come from overseas and became sick.
So, before I gave a heads up to Miyu, who was barely conscious, I checked to see if there was anything wrong with her body.
I check for any wounds, bruises, or inflammation.
I didn't hesitate to flip her skirt up either.
I was so impatient I didn't pay attention that I saw her nipples.
I lifted the hem of her blouse, checked her back, and eventually my mind calmed down as I couldn't find anything no matter where I looked.
"Umuu... nn...fuuh..."
Miyu lets out a sound that sounds like sleep talking, then relaxes her whole body.
Miyu's body slipped through my grip, which had become too loose due to the inspection, causing her to almost fall down.
And then, I hugged her.
With both hands.
It was unexpected.
Despite the fact that I could have just let her fall onto my hands slowly.
I thought it would be a problem if she fell headfirst onto the floor, so I forced myself to support Miyu's body.
"Oh, sh, shit..."
My hands were grabbing Miyu's breasts.
That big, soft weight.
Miyu's touch was something I had wanted to feel many times, but had never been able to ascertain.
It's as elastic as I would expect, but it's also softer than I imagined.
With a little force, it deforms and overflows between my fingers.
Then came the second mess.
I'm grabbing Miyu's breasts through her blouse, but why are they so soft?
Since I was touching Miyu's breasts, which are definitely classified as big, it was only natural that they should be soft.
However, I was stuck with that strange feeling.
That's right.
I'm not holding Miyu's naked body.
Since I'm grabbing her breasts through her clothes, they must be stiff.
Because there's no way a girl of this size wouldn't wear a bra.
"It's, not on..."
I was rubbing it unconsciously.
My instincts didn't allow me to resist the softness that was right in front of me.
While enjoying Miyu's boobs, I did see it.
A large bra was thrown under the table.
I was so panicked that I became reckless, but I should have noticed that when I checked to see if there was anything wrong with her chest earlier.
Ahh, shit.
Soft.
Feels good.
I wonder how much pleasure it will bring me if my hard erection was squeezed between them.
I want her to do it.
A paizuri.
By Miyu.
Before I die.
About one time.
"Fuah... nh-... I... why am I here..."
"M-Miyu!! You woke up!! What a relief!!"
I hurriedly let go of my hand, released Miyu, and got off the sofa.
Miyu was there, stretching her back properly and rubbing her eyelids.
"Ah, it's Onii-chan. Good morning."
"G, good morning, Miyu. What's wrong? It's not appropriate to sleep dressed like that."
Miyu didn't seem to remember anything that had happened since she returned home.
I had heard from her that there might have been something today.
Was it so shocking it caused her to fall asleep?
"Ahh, I see. Yeah. Looks like it didn't work."
"Didn't work? About what?"
"It was no good. I was no good after all."
Miyu quickly fixes her clothes.
When I picked up her bra and handed it to her, Miyu touched her breasts several times before taking it, tilted her head, and then put it on.
Did it leave her feeling uncomfortable?
I just did something very risky.
She put her bra right in front of me, so she probably still isn't fully awake yet, but.
Did I do something wrong?
No, but, that first hug was just an accident.
No question about it.
I'm sorry for what I did, but it was due to uncontrollable circumstances.
"Onii-chan, what time is it?"
"It's almost 6 p.m."
"I see. Then let's eat some food."
"Yeah, let's."
With Miyu trudging to the kitchen, she brought a set meal of sea bream meuniere and tororo to the table.
Did she have the energy to make this?
Since it's Miyu, I'm sure she could also make something like this while unconscious though.
I can't believe that she prepared such a wonderful meal for me while I, her older brother, fondled her breasts without her permission.
I'm horrible.
I really have to repent for this.
"Onii-chan, you came home late today, right?"
"Yeah. I had to take care of something urgent."
I grab some rice from the rice cooker and sit down.
I also took Miyu's share.
"Sorry for making you worry."
"It's okay. You're not sick or anything, are you?"
"Yeah."
Miyu pours soy sauce onto the yam and stirs it weakly.
"Well, there's one thing I need to apologise for."
"Nn? What happened?"
I took the soy sauce that Miyu had placed and poured it over the yam while saying the words in a natural way.
"When Miyu was sleeping, I rubbed your chest a little..."
Whether I affirmatively stated it or not, a loud 'dun!!' sounded across the table from me.
I jumped in surprise, and then realized that the tororo in my hand was gone.
Miyu stole it from me.
Not just the tororo.
From the meuniere to the miso soup to the pickles.
Before I knew it, everything except the rice was laid out on Miyu's table.
"The to... tororo..."
I muttered to myself as the only thing that could serve as my side dish was soy sauce.
At those words, Miyu glared at me with murderous intent in her brow.
"I don't know. Just cover it with your own semen and eat it."
Miyu quickly ate my meuniere in large mouthfuls, then stirred up the tororo for both of us and poured it into her own rice bowl.
"I-I think that I was wrong! But, when I was supporting Miyu's body, the timing was bad, um, it was just an accident...!"
While I try to make excuses, Miyu doesn't seem to be able to contain the anger that lies deep within her cold expression.
"It's a good opportunity for you to find out how bad Onii-chan's semen tastes anyways."
Shit, she's really angry.
Well, she did say she would be in a bad mood today.
Why did I have to do that on such a day.
"I-Is it really that bad?"
I didn't want to create an awkward atmosphere, so I somehow manage to maintain conversation.
"It's five times as sticky as tororo, and three times as fishy as squid sashimi."
"T-that much..."
"First of all, Onii-chan lets out way too much. Even male porn actors don't let out that much."
Oh yeah, Miyu studied AVs to teach Sachiko about sex.
Even though she didn't know other men, she ended up with something to compare myself to.
"Your semen is too thick. Onii-chan can't ejaculate without thinking about me, right? Why are you ejaculating so much?"
"M-my bad."
"I'm your little sister, right? Your biological real little sister. You bust so many times a day, I wonder where you're storing that much semen. Seriously."
"I'm curious, too."
"You know that I don't take to skinship nicely. Onii-chan, I think you've been mistaking yourself to be popular with girls lately. If I don't help you, Onii-chan won't even be able to talk to girls casually. If I take away the housework, all that's left of Onii-chan is his sexual desire."
Ahh, no good.
I can't handle it anymore.
There is no position where I am not at fault for anything.
"You really want to impregnate me."
"My apologies."
"Pervert."
"Sorry."
"Idiot."
"I really do feel bad..."
Miyu's voice gradually became quieter.
As if her anger had subsided, she slowly began to eat.
As expected, I don't feel like eating anything with my own semen.
I don't feel comfortable fetching new ingredients from the fridge either.
Should I eat it with just soy sauce?
I don't think at that level, it would genuinely reflect my sincerity.
We didn't say anything to each other, it was quiet, and Miyu put her bowl on the table.
"Sorry. Maybe I said too much."
Miyu apologized awkwardly.
"No, no. It's completely my fault. Miyu isn't in the wrong."
I have no intention of repaying her kindness with hostility.
In fact, I would like to repay Miyu's kindness by doubling or tripling it.
But I didn't have the ability to do that.
For example, what kind of favour can I give in return?
I don't know.
That's why I'm always one step behind.
"Haah..."
Miyu sighed and looked like she was about to cry.
"I-I'm sorry! I'll do anything to apologise!"
"Yeah. Well, I do intend to have you apologise. But that's not the point."
Miyu transferred the tororo to the bowl, put it back into the original container, and returned it to my table.
"What happened today?"
"Well, yeah."
After that, Miyu didn't continue speaking.
I didn't feel like pursuing it either, so we both finished our meal in silence.
I carried the dishes to the kitchen and was about to wash them, but my hands stopped.
Miyu was holding her knees on the sofa.
"Is there anything you'd like me to buy? Or... what... would you like some tea...?"
I looked for something I could do without delving too deeply into Miyu's troubles.
Anything is fine.
If it makes Miyu feel better.
"Thanks. I don't need anything in particular, you know."
Miyu buries her face in her knees and curls up.
This is the first time I've seen Miyu look so weak.
Maybe I should leave her alone.
But then she'll feel like going back to her room.
What's the best thing for me to do?
"Today, I had a medical checkup."
Miyu opens her mouth with her face down.
"A medical checkup? At a time like this?"
"Last month, there was a strange cold going around the whole school. Even though it was summer, there were some kids who had the flu. And we had midterms, so they had to postpone it to this time of year."
"Was that so. So, what happened with your health checkup?"
School health checkups only involve physical measurements, other than checking your eyes and teeth.
I don't think there's anything like being diagnosed with an incurable disease.
"Height."
Miyu blurts out.
"I've only grown one centimetre since last year."
I see, so it was that.
But even if she had grown by only one centimetre, I don't think that's a tragic figure for Miyu, who is petite to begin with.
She's a girl, after all.
"That's a shame. Height can't be helped with hard work-"
"And yet."
Miyu kept interrupting me.
"My boobs had grown by 4 centimeters."
I heard the sound of sniffing nasal mucus.
Miyu is crying.
"T-that's also..."
When she says boobs, that means her chest circumference has increased by four centimetres since last year.
"If it changed by four centimeters, wouldn't your bra size not fit anymore?"
"That's why I bought a new one last month. At that time, it was still only two centimeters bigger than last year."
Chest measurement does not necessarily directly affect cup size.
However, looking at Miyu, it is clear that only her breasts have grown.
Adding four centimeters directly affects the difference between the bust top and under bust measurements.
"Did you gain two more centimeters in the past month and a half..."
I don't even know if that is possible, but if it's true and it went bad, it would be time for her to change her bra again.
"Recently, even though I've gotten a little thinner, I've been limiting the amount of food I eat. I don't like it anymore... I don't have cute clothes... I can't maintain my shape..."
Miyu lies down on the sofa while holding her body.
Miyu is naturally particular about her appearance.
The damage appears to have been severe.
"In reality... I wonder... how much... it actually is..."
When I tried to ask her what I was curious about, I ended up whispering due to definitely having too little delicacy.
"G cup..."
Miyu answered in a lifeless voice.
"It, it's a little tight. I manage to get it in by using the outside of the hook. If it gets any bigger, I'll have to buy another one again. It's expensive. My shoulders are stiff. People's eyes around me are disgusting. I don't want to leave the house anymore."
She hugged her melancholic chest and muttering something like a curse.
Miyu's breasts have grown rapidly over the past month and a half.
That was when her relationship with me started to change.
Maybe I'm being too self-conscious, but I think that's probably why Miyu got angry when I touched her breasts.
"Uh, I'm sorry, okay."
Naturally, words of apology came out.
"Nn? Ahh, about touching them?"
"There's that, too. Various things. Like making you drink."
It's regrettable that she said it tastes bad.
Miyu doesn't show her emotions, so I thought she was the type who didn't really care about the taste of semen.
"Uuu-nn... I can't say for certain that that wasn't the cause, but... it was my intention to drink it, so I don't think it's appropriate for you to apologise."
Miyu saying so, it's indeed just as she said.
I was planning on having her take it in with her hand, but her mouth was open and I came without thinking.
Even after that, Miyu did not refuse cumming into her mouth.
I'm sure anyone would want to cum if something like that happened to them.
Although she says it was her own will, I wonder what Miyu was thinking when she drank my semen.
"But from now on, it's better to refrain, huh."
"If you haven't given up on getting a girlfriend yet, maybe you should hold off, yeah."
"I never gave up though. So, uh, what if I said I wanted to do it now?"
"Now? It's not like it matters or anything."
"Eh."
Seriously.
It's fine?
"Didn't it taste bad?"
"It tastes bad. As I've said many times. It tastes really bad."
Right...
"But there's a difference between it tasting bad and hating it."
Miyu hides her face in her chest.
I think the only things I like even if they don't taste good are aojiru and protein shakes.
Does Miyu think of it in that way as well?
"Planning to cum?"
As the actor says that, my penis swells up with desire.
An erotic situation that I have experienced with Miyu.
And Miyu's breasts that I touched earlier.
My heart beats louder.
How could I ejaculate to such a depressed little sister.
How is it even possible to think of such a thing--
"...I-I want to let it out."
My lower body did not hide its true feelings.
Its expansion is clearly visible even through my slacks.
Despite having so much sex with Sachiko yesterday, I lust for my depressed little sister.
When the other person is Miyu, I can't reason.
I'm unable to put a stop to it.
Even in situations that would be impossible for a normal person to think about, I put my sexual desire first.
"Let it out before mama gets home. Don't hold back."
After an evening meal.
It's still early for my parents, but there's no chance they won't come back.
Moving to my room would be the safest course of action, but we both understand that it's not something that we can do under these circumstances.
What position should I use to handle it?
As I put my hand on my pants, I was at a loss as to how to expose my erect penis.
Even though I have masturbated in front of Miyu many times, my sense of shame hasn't gone away.
But in the end, when it comes out, it will be exposed in front of Miyu's face.
In that case, what I should be thinking about is not how to handle it.
It's about which part of Miyu I should fap to.
"I can't touch your body, right?"
"Definitely not."
This is the only thing she's not giving up on.
If I had touched her directly earlier, I might have been killed.
"Can I smell you?"
"Depends on where."
"Your skirt?"
"No."
Damn, I don't know if my little sister's tolerance is wide or narrow.
"By the way, sniffing your clothes is also forbidden, right?"
“Well, things have changed, so I guess it’s okay.”
Since when have things changed.
The other day she did it with her hands, so I can see that Miyu's boundaries have changed, though.
"But if you smell what I take off in the bathroom, I might crush it."
"I promise I'll never do that."
A man's vital points are no joke, it could die.
"It can't be helped."
Miyu tapped her hand on the pit of her stomach, where her blouse was pushed up against her tits.
"Here."
I felt as if Miyu's eyes were calling me, so I sat down right next to her.
Miyu is still pointing to the area below her breasts.
Does that mean I should get closer?
That means, no way.
"Eh-... i-is that okay?"
Miyu nods in response to my question and then removes her hand.
Does that mean I can smell it there?
What a motherly kind of eroticism.
The ultimate joy of men.
Are you saying you're going to give it to me?
I guess she has no intention of rehabilitating me anymore.
No, I don't know what it is anymore, but it's the best, so I don't care.
I knelt down in front of the sofa, took off my pants, and put my nose between Miyu's chest and stomach.
"Haah... guh...!"
As I inhaled the air filling my nostrils, a numbness spread through my brain like a drug.
It's too strong, Miyu's scent.
A sweetness unique to girls.
A fragrance that smells like sunshine mixed with the flavor of fabric softener and sweat.
"Ahh... suh... haah... aahhh...... my brain's... melting......!"
The unique scent of the area, especially the cleavage where Miyu sweats the most, the ultimate point where the drops drip and are absorbed.
The hand that was gripping my cock was capturing its protruding blood vessels.
The capacity of its corpus cavernosum can't keep up with the amount of blood supplied by my heart.
The inside, which has become hard like an iron core, hurts.
Still, my penis sprang up in the blood that was relentlessly sent.
Its Cowper's fluids seemed to be panting and drooling with screams.
"Uuuu... Miyu... ah... ahhh..."
My head is blurry and fluffy, as if I've been put under anesthesia.
It wasn't until about a minute later that I realised that there was human skin on the top of my head.
Miyu is patting my head.
From the moment I realised this, each strand of my hair began to feel Miyu's body temperature.
"Ahh... -guh... uuaaahhhaah...!"
It was almost equivalent to caressing an erogenous zone.
Every time Miyu's hand strokes my head, a pulse of pleasure rushes through me like an avalanche.
"If it feels so good, cum right away, Onii-chan."
Was it Miyu's help?
Even that callous line became a provoking phrase that incited me to ejaculate.
"Miyu... haaah... aaaahh... Miyu...!"
Miyu must have sensed that I was about to ejaculate as my strokes became faster.
"Onii-chan, hold your breath."
And yet, in return for this greatest reward, Miyu gave me an extremely cruel order.
I couldn't help but want to scream like a baby.
Still, I had no right to disobey Miyu's orders, so I obediently held my breath.
My consciousness fades away as the oxygen concentration in my blood becomes thinner.
The pain that the endorphin called Miyu had somehow managed to cover up was sending out danger signals.
That's when the pleasure of masturbation started to fade and my hand was about to stop.
"Yes, take a deep breath."
Miyu was stroking my head, both hands on both sides of my head.
Tightly, she pressed my face against her stomach.
"Nn-... nnnnhh...!!"
The moment I took a breath, my haemoglobin, which sought to absorb oxygen, was controlled by Miyu's pheromones.
Miyu's scent ran through my entire body, and I gripped the base of my penis, which had almost erupted, stood up and shot all my semen into Miyu's mouth.
The semen poured out so sloppily that it's more correct to describe it as poured rather than fired.
All of it overflowed into Miyu's mouth, and Miyu's mouth was so full that the base of her tongue was so cloudy I couldn't see it.
"Ah... nnmuu..."
Miyu swallows it and rested her weight on the sofa again.
For a moment, my head was so clouded that I didn't even know why I was standing there.
"Tastes disgusting."
Without moving a single eyebrow, Miyu said that and closed her eyelids.
How did this happen?
I pathetically stood there with my lower body exposed, and stopped thinking about it that day.
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