It's rare for me to smell Miyu's sweat, and I can't help but feel aroused by the smell of Miyu, which isn't shampoo or fabric softener.
The pure joy of connecting with Miyu and the excitement of holding a woman in my arms; that day, for the first time in my life, I wanted to kiss a girl.
"Mi... Miyu..."
However, I had never experienced or imagined kissing a girl.
I don't know what the right thing to do is, and I can only make noises that I can't even hear.
It's inappropriate to preface our first lip contact with, 'Let's kiss.'
In other words, I feel that it's wrong to force it.
Close your eyes, stick out your lips... that way is just gross to me.
With that in mind, I was stuck holding Miyu in my arms.
However, it seemed unnatural to do so all the time.
Unable to rely on momentum, I released Miyu's body.
Immediately after that, Miyu grabbed my collar and forcefully drew my face.
"At times like this, this is how you do it."
Miyu raises her head and brings her face so close that our noses are touching.
Then, when she made eye contact with me and communicated her intentions, she gently pressed his lips against mine without a moment's hesitation.
Our most temperature-sensitive organs touch each other.
I didn't taste my first love.
Chuu, I heard the sound of air entering my mouth, and all that remained was the tiny amount of saliva I had exchanged with Miyu and the fact that I had kissed her.
"Ah... oh..."
My heart was fluttering like a virgin when my first kiss was taken from me by my suddenly aggressive little sister.
What do I do.
My chest is throbbing and fluttering.
I've been making fun of that sexual harassment group up until now, but I don't think there's any woman who wouldn't seriously fall in love with this sister of mine.
"Got it?"
"Y-yes. I learned a lot."
The clock in the living room had already struck 8 o'clock.
Miyu no longer mentioned the exchange this morning, and relief spread in my chest that this was the correct answer.
"Shall we eat?"
"Yeah."
After that, I finished my meal with Miyu and got lovey-dovey with her for a while.
I say that, but we were just playing the game clinging onto each other.
"Miyu, you're unusually sweaty. Was Miyu out too?"
I asked Miyu a question that suddenly came to mind as she was sitting on the sofa with me hugging her from behind.
"Nh... Well, a little."
Miyu blushed and blurted out.
"I didn't go out though."
With that answer, Miyu began to concentrate on the game.
Rather, she seemed to be trying not to focus on anything else.
She didn't go out.
But she's sweating.
It didn't take long to derive the answer from these two pieces of information.
However, as far as 'how did it happen' is concerned, I couldn't figure it out.
I thought for sure that she was enjoying lolita cosplay again.
"In relation to that. I have an apology to make."
"Apology? To me?"
"Yeah."
Oh, oh.
That's unusual yet again.
What on earth could Miyu do that would be wrong?
"We can't sleep in Onii-chan's futon today, so let's sleep in my room... This is my apology."
Miyu fidgeted as she stated her poorly connected apology.
I try not to think too much about it, but it seems like my futon is no longer of any use.
I don't think about it deeply, but.
"Well, that's fine. First, I need to wash away this sweat."
"I'll make the bath!"
Miyu jumped from my knee and went to wash the bath.
I don't know if she was trying to hide her embarrassment or if it was because of the joy of taking a bath with me.
I just thought she was cute.
"Come on, Onii-chan. Let's go."
Naturally, the two of us headed to the bathroom together, washed our whole bodies, and then soaked in the bathtub in our usual positions.
Miyu's body is very erotic.
Thanks to her reclusive nature, there is no dullness in any of her parts, and even though she is small overall, she has all the flesh that should be attached.
And today, there are breasts in front of me so ferocious that all the impressions I had about those details are completely blown away.
"Miyu-san."
"You can't."
Since we had mutual feelings for each other, I thought it was about the right time.
The reason she doesn't like being touched is because it makes them grow unnecessarily, so I can't forcefully delve into it.
"But, Miyu. It seems that when fat is rubbed, it breaks down and becomes smaller."
"I know, but I have the impression that if Onii-chan touches me, I'll get bigger. And Onii-chan will probably touch me while thinking that I should get bigger anyways."
"That can't be denied, huh."
That can't be denied.
I'm glad that her boobs are big.
"But, I think we can't dismiss the possibility that Miyu cherished her breasts too much, which is why they got so big."
"Hmm... maybe, apart from the fact that Onii-chan just wants to touch me... I'm sure there's more..."
It seems like she can see right through my heart, but I wonder if I can push through this.
Ah, no, wait.
"But is Haruka rubbing it?"
If Miyu's breasts got bigger because of Haruka's rubbing, then my theory is broken at that point.
"Haruka doesn't rub it that much."
"Is that so? I think you said earlier that it's been developed quite a bit because of that."
"She's the type who only teases me to make my skin sensitive, so she doesn't massage or rub hard."
"I see."
Is that why her neck and thighs are unusually sensitive?
Does that mean that the only parts that are sensitive about her breasts are the epidermis and the tip?
"Then you have almost zero experience in being rubbed?"
"That's right. At school, the girls often rub each other, but I don't participate with them."
If they did that to Miyu, she would probably get angry.
I don't feel like the girls around Miyu are just rubbing each other anymore.
"So, about that."
"Muu... Well, it's fine."
And this time, she read me in advance and unexpectedly agreed.
With this, there's no need to ask complicated questions anymore.
"I think you understand, but if you mess with the tip, I'll slap you."
"Ahh, I'll be careful."
I understand.
All I was allowed to do was rub the fatty part of her boobs.
That's more than enough.
I stopped breathing and gradually moved my hand carefully in front of Miyu's stomach upward.
And, trying not to touch the tip, I first enjoy her breasts from below.
The part that weighs the most in terms of shape.
First, I was surprised to find that it had become lighter due to the buoyancy of the hot water. I was even more surprised at the softness of the flesh that I had sunk my fingers into, and the elasticity condensed inside. When I lifted it up, I felt the weight of her breasts, which were no longer buoyant, in my hands. My heart trembled at the weight of resting my hands on it.
"Nh..."
Perhaps because it was unfamiliar contact, a small moan leaked from Miyu's mouth.
When that incident happened before summer vacation, I was so nervous and anxious that I wasn't able to fully enjoy it.
I didn't think Miyu's boobs were so erotic.
I didn't know that.
"Ah... come on. You're getting big after all."
Naturally, I had an erection with the hardness of my cock a compliment to Miyu's boobs.
However, things suddenly turned around from here.
By the words that came out of Miyu's mouth.
"Didn't you have Kanade-san do a lot for you?"
There were no thorns in Miyu's words.
However, I was shocked by the question and let go of my hand.
"Yamamoto-san, you mean... sexual stuff?"
"Yeah. You were late and smelled like shampoo."
"There's a reason for that. Anyway, there was nothing naughty or anything like that."
"...Eh?"
When Miyu looked back at my answer, she looked flustered for some reason.
"Huh? You don't trust me that much?"
"It's not like that. Onii-chan went to Kanade-san's house today, right?"
"I went. After Yuka called."
"But you didn't do anything naughty? You weren't even invited?"
"She didn't have any intention of doing anything sexual or wanting to... I think."
As soon as I entered the room, Yamamoto-san became clingy to me, so I wondered if that was an invitation to do something lewd.
Didn't it not progress any further because I refused?
If that were the case, why would Miyu be impatient about something I didn't do?
I've always thought that everything that happened today was within Miyu's imagination.
But judging from this reaction, I guess that's not the case.
"...It's different from what was promised."
Miyu muttered like that while thinking deeply.
It seems that something was exchanged between Miyu and Yamamoto-san.
I'm sure that was decided when the two of them discussed it three days ago.
"Is something bad about that?"
Even if some kind of promise was broken, wouldn't that be a good thing if I didn't end up having sex with another girl?
"I just received a message from Yuka. She appealed to me that she owed Onii-chan a great deal."
"That's my apologies."
Don't let that girl ruin my good impression.
"That's fine by itself. Onii-chan, you let Kanade-san go, didn't you?"
"I guess you could say that. Miyu is the best for me, so I can't get flirt with Yamamoto-san anymore."
Because the situation was confusing, I told Yuka that I had been confessed to.
In reality, I did not hear directly from Yamamoto-san's mouth that she had any favouritism for me.
"Hey, maybe. Onii-chan, did you reject Kanade-san with all your might?"
Miyu asked, my pulse jumping unpleasantly.
"I told her clearly that liking me wasn't good for her either."
For Yamamoto-san, and most of all for me and Miyu.
The result was Miyu's 'Ahh-,' disappointed face.
I wonder why.
"Don’t you feel sorry for Kanade-san?"
"Eh!? Of course, it didn't work out amicably, but..."
What other way was there besides that?
No way, what I said to Yuka, 'I don't care if I end up having sex with Yamamoto-san,' was the truth in itself, but even after Miyu had feelings for me, she really thought that I could have sex with another girl?
"But I see. That's what it is. Hmm. I see, I see."
Then Miyu seemed to grasp the full extent of the situation and suddenly became satisfied and hugged me from the front.
"I think I made Onii-chan a little too nice of a man."
"T-that so? Is that... happy for you...?"
"That's right. A happy miscalculation. It ended up being troublesome though."
Apparently, Miyu had her own plan.
"Well, it's just two more similar jobs, so it's not a big deal. Thank you for your hard work today, Onii-chan."
Miyu stroked my head.
I was hugged and praised by such a naked angel.
That alone blew away all kinds of negative emotions.
"How can I apologise to Yamamoto-san?"
"I'll leave that to Onii-chan. However, there is something I want your cooperation with."
"Cooperation? I don't mind that."
If that can heal Yamamoto-san's heart, then by all means, there's nothing wrong with it.
"You won't tell me about this plan you're hiding behind the scenes, right?"
"If I tell you, the success rate will go down, so I guess I'd like you to leave it to me. This is also so that I can flirt with Onii-chan without having to worry about any consequences."
"Ohh. Is that so."
Cooperate with Miyu in any way to flirt with her.
I still don't think I've been able to repay Miyu for what she's done so far.
"Just to confirm, Miyu, is it okay for me to do lewd things with other girls?"
"If anything, it's definitely not."
"It goes without saying either way."
This seems to contradict what she said earlier, but in other words, I had no choice but to have sex with Yamamoto-san because of that plan, if it was as Miyu expected, it would have been settled.
"But, Kanade-san's already in love with Onii-chan, isn't she? Since Onii-chan also treated her in a way that drew her favour, even though you chose me, there is a way to take responsibility, isn't there?"
"I think that's true."
I pushed her away thinking it was for Miyu's sake, but that was the worst way to dismiss her as a man.
I said I'd like to discuss it with her again, but if summer vacation ends like this, I don't think I'll be able to have a proper conversation with Yamamoto-san in the classroom.
"So, I have no choice but to offer Onii-chan's body to Kanade-san."
"Is that seriously the case?"
At worst, it would be fine if it all settled down to that.
But why does it matter if I have sex with Yamamoto-san?
"I think I'll probably have you do it with Yuka too."
"Why!?"
"As for that, it's my fault. It's just a favour. This is needed in order to refresh our relationship. Is that okay?"
"If Miyu says so, it would be fine if those two were my partners."
That girl, she's been full of herself lately.
But when it comes to Yamamoto-san, it's a lot more awkward, and both situations are difficult to deal with.
"Including that, you won't tell me why, right?"
"Yeah. I'll make sure there's no problem even if you don't know. There's no point in dealing with Yuka unless Onii-chan's in his natural state."
"...Got it."
It's not like I'm trusting Miyu with everything.
However, regarding this matter, I decided that it would be better for me to just be a collaborator.
In the first place, Miyu is the reason why I became friends with the girls, so I'm sure the result will be much better than if I were to stir things up.
"So. From now, Onii-chan will get a little special training."
"Special training? That's too sudden."
Special training sounds like something in a battle manga, which makes me nervous but also excited.
Things like learning about girls' psychology, getting more fit, and memorising important information.
None of these are areas in which I'm confident in, but I seem to be able to do my best in anything for Miyu.
"With that said, Onii-chan, sit here."
Miyu pointed to the edge of the bathtub.
I get up and sit on the edge of it, just as I was told.
Miyu sits in front of me, and in front of Miyu's naked body, my lower body is not calm.
No matter how I thought about it, it was not a healthy picture.
"Somehow, I'm in a position where a blowjob is about to start though."
"Nh? You want a blowjob? I was thinking about doing it with my boobs."
"Whether it's right or wrong, I prefer boobs. Or rather, both..."
"Well, either way, I'm going to suck it to get it wet."
Miyu put my cock, which was about to grow, into her mouth.
"Owah..."
Up until now, I had only had my fully erect penis licked, but it feels so good to be licked while it's half erect.
However, because of that, I quickly become energetic.
"Hamuu... jyupu... muchu..."
Miyu started blowing with more saliva than usual.
This was obviously preparation for giving me a titjob, and that excitement alone was enough to make me feel like I was about to reach my climax.
Oh shit.
I have to put up with it.
There's no way I could ejaculate before such a reward.
"Nguh... juu... puhaa. Onii-chan, it already has a great taste of pre-cum."
"Sorry, I'm trying my best to endure it."
Miyu looks amazed as she handles my penis with her hands and checks the level of friction.
Finally, she dripped the saliva left in her mouth onto my glans, and then leaned forward with her hips slightly raised.
"Then I'll do it. Don't let it out on your own, okay?"
"A-ah, okay."
Miyu lifted her own ample bosom with both hands and squeezed me from both sides.
"Nh, just a moment."
Miyu uses the flesh of her body to handle my penis.
"Aah... haah... ah, it feels so good... shi-...!"
Every time she moves her breasts up and down, the weight of it resonates in my lower body.
Miyu is looking up at me with her eager eyes and giving me a titjob.
Every time my penis is handled by her boobs, the saliva dripped from Miyu makes an explicit sound, destroying the organ that suppresses my sexual desire all at once.
"Ah... ah...! S-stop! Oh no... cu-... ah...!"
Miyu stopped the swaying movements of her breasts.
If I hadn't been warned not to let it out on my own, I might have ejaculated like this.
"Onii-chan. Does it feel good?"
Miyu happily licked the glans of my penis, which was still sandwiched between her boobs.
"Haah... it feels good... it's so good..."
"Heeh. Hiryuu... herou... nh. Does it feel better than Kanade-san?"
"Eh...!?"
Miyu's sudden question made me sweat on my back.
"Why? That kind of thing."
"Because Onii-chan, Kanade-san's boobs made you cum a lot right? Did it feel good?"
"Ahh... About that..."
That's what it was.
These two were openly talking about what kind of sexual interactions they had.
"Both leave me in a great state though."
"I'm telling you, that's not good enough."
Miyu turns dissatisfied, and resumes her titjob.
With her left and right boobs covering my whole penis, they produce lewd sounds from lifting them up.
"Ah... guh...!"
To be honest, of course, Miyu feels better.
Miyu is definitely more erotic, and I am overwhelmingly happy that Miyu is doing it.
"Which one feels better?"
Miyu insistently repeated the question and continued with the blowjob and titjob.
There was so much pleasure in my lower body that I felt like I was going to ejaculate before I could answer.
"Haah... aauhh... aahh... Miyu, already...!!"
Ejaculating.
In Miyu's boobs.
I let out a large amount of semen as if I was inseminating it.
"If you cum without answering, I'll never do it with my boobs again."
"Eh...!? T-that's... aaah...!"
Miyu glares at me and intensifies her titjob while holding my penis tightly.
Pang, pang, pang--!
My cock is ravaged by Miyu's breasts and raped helplessly.
The sound of water splashing repeatedly echoed through the bathroom.
My brain felt like it was hypnotised, and I couldn't even move my muscles to hold back my ejaculation.
The semen reached the base of my urethra, yet Miyu's soft flesh still wrapped around my entire cock, attacking my erogenous zones mercilessly.
There's no greater pleasure in this world than being raped by Miyu.
"Aaguh... aaahh... ah, it feels so good...!! Definitely better than Yamamoto-san!! Aaaaaauuhh... aahh... Miyu... cumming... cumminggggg!!"
Byut, dobyut, gupyut, byut, byubyut--!
I let out a huge amount of semen into Miyu's boobs.
Even her big breasts couldn't hide the amount of thick fluid that burst out of her chest due to the force of the ejaculation that followed.
"Haah... haah..."
Miyu was the one who was exercising, but it was instead me laboriously breathing.
My heart was beating so violently as if there was no blood at all.
"How was it?"
Miyu spreads her boobs to the left and right and enjoys the sticky semen I released.
"It felt really amazing, but I feel just as guilty..."
It was a sickening feeling of guilt, like when I secretly did something bad behind my parents' backs when I was little, only to realise my mistake without being scolded.
She should have known that doing lewd things with Miyu was clearly better than with Yamamoto-san.
Why did she make me do this?
"From now on, when you do something naughty, please say which one feels better, Kanade-san or me, and then let it out."
"You're going to do it tomorrow too!?"
"It's only for a while. This is also to make up with Kanade-san, so do your best, Onii-chan."
"Y-yeah..."
How am I supposed to make up with Yamamoto-san?
I don't think so, but I wonder if she's preparing for when I'm asked which one is better, Yamamoto-san or Miyu, like before when I have sex with Yamamoto-san someday.
"Well, I'll take a bath now."
The water had cooled down a lot since it had been in the bath for quite a while.
I could have rekindled the fire, but I'd rather stay warm in bed than do that.
In bed with Miyu, with that body temperature.
When I got out of the bath and returned to my room, the futon and sheets from my room had been hung out to dry on the balcony.
For some reason, even my pillow was sacrificed.
It's embarrassing because it looks like I wet the bed, but it was actually Miyu who did it, so I'm not guilty.
I changed my clothes and went to Miyu's room, where I ended up sleeping on Miyu's futon for the first time that day.
The room was cooled by the air conditioner, and we warmed up with each other's body heat.
What a sinful co-sleeping.
"Onii-chan."
Miyu leans closer and hugs me tightly.
I already know that Miyu likes doing things like this, so I won't reject Miyu's desire to hug me at all.
"I'm very happy."
Miyu said that again before I nodded and hugged her back.
Miyu's happiness is the best thing for me.
Miyu and I fell in love with each other.
There are still many challenges, but I think we have taken the most important step.
We are brother and sister, and we are also lovers.
Does Miyu no longer care that I'm her real brother?
I don't mean to insist solely on sexual desire, but I think it's a necessary act for two people to build a healthy relationship.
"Hey, Miyu."
There are times like this.
In times like these, now is the time to listen.
"Do you no longer care that I'm your real brother?"
I don't care that Miyu is my real little sister.
Actually, I never worried about it from the beginning.
That might be the problem.
Though, looking back, I feel lucky that I didn't have that barrier.
"What kind of question is that?"
Miyu presses her body against me and smiles happily.
"So... uh, sex, and that stuff. Does Miyu think it's fine...?"
No matter how much I like her as a person, I can't hide my feelings about her as a woman.
Because I consider Miyu to be my own woman, I want to have all of her body.
"I'm wondering when you'll invite me, you know."
Miyu replied cheerfully, but embarrassedly.
"But, Onii-chan."
Miyu continued to speak.
It was a confirmation of one fact that needs to be taken into consideration, that just 'loving' each other is not enough.
"Please properly understand what I said this morning and invite me."
Miyu said that and closed her eyes.
What did I need to be careful about while talking with Miyu again?
At breakfast, I was told why she avoided blowjobs.
The story was that Miyu had no qualms about having sexual things from the beginning, and it was there that I was able to confirm that it was okay to have sex.
Next, she told me that she liked being clingy with me, then Miyu confessed to me, and finally I heard about Miyu's attitude up until now.
Out of all of these, what I need to be careful about when having sex is... like I thought, it's about that.
Miyu's sexual desire is unusually high when I get lewd with her.
What will happen if such a Miyu becomes involved in a real act with me?
What if I didn't think about it, having sex with Miyu to the fullest extent of my lust?
If I think about it seriously, it's not an easy story.
If I do that, Miyu might lose control of her sexual desire and start begging me for sex every day.
If we ended up going to the same high school in such a state, we'd probably forget about studying and do nothing but have sex 24/7.
"...I get it. Miyu."
Even Miyu must have the desire to do so.
I cherish that as her older brother and as a man.
I'm the only one who can make Miyu happy.
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