Yuka slowly sits up and straightens her position.
"Miyu will continue doing it with Haruka, and Onii-san will only do sexual things with Miyu, right?"
I kind of understand her point, but when it comes to Haruka, I can also consider her as just a business partner.
Besides, Miyu didn't explicitly say that they would continue to have the same relationship from now on.
"Then, am I the only one here who hasn't done anything lewd?"
"Yeah? ...yeah."
So, what's the matter.
"Miyu does sexual things with people other than Onii-san. Onii-san only does sexual things to Miyu. In other words, this relationship will only become even if I and Onii-san do sexual things too."
"I'm sorry, I know what you're talking about, but I don't know what you're talking about."
I momentarily agreed with her unexpectedly.
In any case, there is no way such a super-theory will be accepted.
"What for-. Come on, let's get lewd."
"I said I won't. Moreover, wasn't Yuka angry because I forced her to do it?"
It's strange that the person himself, which is me, would ask such a question.
"I'm not as angry as I say. It's because you behaved like that that left us like this, right? That's what happened. It was Miyu who made you do that."
"Completely set up..."
Only her slyness works really well.
She always seems like an idiot, so I don't know how much she's thinking when she speaks.
"As for that matter, since it was Onii-san, it turned out to be okay. When the truth was revealed, it just ended up being a type of play for me."
"Weren't you mentally torn to shreds after being robbed of your virginity?"
"It's okay. That's the kind of relationship Miyu and I have."
According to Yuka, there seems to be a tacit understanding between the sexual harassment group, including Miyu, that can only be expressed in the world of emotions.
Miyu and Yuka seem to have a relationship where each side is on the brink of thinking, 'Next time might be too much,' but in the end they repeatedly push the boundaries to the extreme.
It's something I don't understand, but perhaps the fact that she's able to talk so calmly means that deep down inside she recognises something similar.
"Then let's leave that matter aside. Why are you so particular about me?"
"What do you mean?"
"It's convincing if you wanted me as Miyu's older brother, but have you interacted with me enough to want to have sex with me?"
"That's... that."
Yuka scratches her cheek in embarrassment.
"Onii-san's the only one who knows me and treats me like this normally."
Gradually, her voice became slightly higher pitched.
She herself was aware that I did something wrong.
"I'd rather be happy about that, or something like that. Besides, since we've done it once, I'd be more comfortable inviting you. Onii-san doesn't look bad either, so there's no reason not to."
"Nh. When you say that..."
From Yuka's point of view, it's not that I don't understand what she said.
But is that enough for her to choose me as her sex partner?
No matter how low the threshold for sex is for this group of girls, there needs to be a clearer 'reason.'
"Yuka is also quite cute, and I think if you were quiet enough, you would find any number of better men than me..."
When I said what I had just thought, Yuka's eyebrows shot up and her fist mercilessly rammed into my abdomen.
"Yo-... u... why are you so... violent..."
"I'm talking about wanting to do it because it's you, so why are you talking about other men? You're saying I'm a woman who can fuck anyone."
Yuka was more angry than I expected.
If she says that, I feel like I said something very rude.
"My bad. I'm really sorry. That was really terrible of me earlier."
Judging from the flow of the conversation, I thought she was just horny, but I guess she called me here just to have sex with me.
Moreover, regardless of Miyu.
I don't know why, but I'm sure I made a mistake anyways.
I mean, this can also be said about Miyu and Yamamoto-san.
Better watch out.
"Are you seriously saying that?"
"Ahh. I'm really sorry."
"Then will you do lewd things with me?"
"I'm not doing that."
"Whyy!"
Yuka moaned like that for a while, then finally became quiet.
There was no life in her expression, and as she sat back on the mat as if nothing had happened, she let out a small sigh.
"Well, that's fine. I don't think anyone will accept me the way I am, either. Someday, when I grow up, I'll be able to mature as well."
Yuka's mood suddenly changed, and my chest tightened with mysterious anxiety.
Should I have been a little more gentle with her?
"But before that, I just wanted to spoil myself a little bit by acting out of character. It was my bad too."
Yuka muttered like she was having trouble breathing.
I thought nothing had changed since that incident where Miyu punished her, but that didn't happen.
It's good for her to grow like this, and I'm sure that's what I wanted as well.
She felt a kind of emptiness, or rather, loneliness.
Somehow, I didn't do enough, huh?
For Yuka.
"So? Why did Onii-san look sour?"
"Ahh, about that..."
I don't know how to make Miyu happy.
That's what I thought when I ran out of the house, but now I don't even know what's bothering me.
Miyu and I fell in love with each other, and I definitely entered a happy life.
I love Miyu from the bottom of my heart, and even though I have a body that can't bust a nut to anyone but Miyu, I can confidently say that I did everything I could to love her.
If that's the case, the reason I don't think Miyu is happy is because I don't think there's a possibility that Miyu will love me regardless of her constitution.
It boils down to this one point.
"I wonder what it is that makes Miyu love me."
"You're worried about strange things, aren't you?" Do you need a reason to fall in love with a man?"
"That... of course you'd need one, right...?"
"Haah. You don't understand anything about women."
Why is Yuka so disappointed in this situation?
There must be a reason you fall in love with people.
That's why Sachiko also looked for the good in me.
"If I wasn't Miyu's older brother, you wouldn't have thought of having sex with me, right?"
"Of course that's the case."
Instantly confirmed.
"But that's like saying what if Miyu and I weren't in the same class. The reason and contents are different. After many encounters with Miyu, I won the position of Miyu's best friend. Isn't it the same for you?"
"That's... I wonder how it is."
I wonder if I could have made any effort towards Miyu.
If I had been able to do something like Yuka, even if it meant literally crawling on the ground, I might be proud of being Miyu's man.
"Onii-san, why have you changed so much? You've become a lot more of a man than you were when we first met. If you stayed like that, I wouldn't have brought you here."
Come to think of it, do Haruka and Yuka know what I looked like when I was a no-good guy?
On top of that, there's no doubt that I've grown up to be this trustworthy.
Miyu arranged all of that for me.
I was just doing what I was told.
--That's what I thought.
Until Yuka asked me this question.
When I think back on it, the only time Miyu took care of me was only at the beginning.
Ever since I started dating Sachiko, I haven't changed because of Miyu telling me what to do.
I've been lectured about a lot of things, but in the first place, making her angry wouldn't have happened if I hadn't taken the initiative.
And the timing of Miyu's anger became an opportunity for our intimacy to increase.
That's how, at the very end, Miyu forgave me and loved me this far, because I was no one else but myself.
I've also done a lot of things in the past three months.
"I think I know Miyu well, but Miyu only makes people work hard when they can actually do it. Miyu is basically indifferent to people and doesn't care for people unnecessarily."
Those words echoed in my chest.
Ahh, yeah.
I've always been reminded of this.
When Miyu first told me that 'I had strong assumptions,' I thought she was stabbing a knife into my chest, but that's not the case.
Miyu was just saying the correct thing.
The only reason I was hurt by those words was because I continued to protect myself with self-deprecation for not trying hard enough in the past.
"Kinda, sorry. And kinda, thank you."
"What do you mean 'kinda?' If you've solved the problem, thank me properly. And as an apology, let me fuck you."
"It's about time you gave up."
All that built-up excitement gone to waste.
But hey, it was refreshing.
At the end of the day, I just misunderstood it.
Since Miyu couldn't fall in love with talented and manly strangers, and she could only fall in love with me, a failure of a close relative, I can only think of her as unfortunate - this order of thinking was wrong.
I'm not a failure, I'm a fine man and Miyu loves me.
However, considering Miyu's constitution, I can only think that I'm a failure.
This is because Miyu has a 'reverse reproductive instinct' that makes her feel disgusted when a superior and manly stranger confesses his feelings.
However, there is a contradiction here.
This is because Miyu's closest relative whom she loves the most is herself.
Otherwise, she wouldn't look at herself in the mirror and get excited by her sexual appearance.
With that said, if you ask me if Miyu is a failure worse than me, that's impossible.
In the first place, all the girls that Miyu is friends with on a regular basis are talented and cute girls, including Yamamoto-san, and this vector is the only one that doesn't have an explanation for things like reproductive instinct.
The only indicator of Miyu's constitution is whether the genes are distant or close.
In other words, the only fact that exists without contradiction is that 'Miyu feels extremely strongly sexually excited by people who are genetically close to her, and feels uncomfortable if the opposite is true.'
It is only sexual desire that is affected, not other thoughts or emotions.
It is generally believed that in order for these reproductive instincts to find the ideal mate, humans are wired to appreciate the smell of the other person's body and the taste of a kiss, regardless of the person's personality.
In this way, even love is manipulated by genes, said one scholar.
That's why I assumed Miyu was like that too.
However, this has not been proven to be absolutely correct, and even if this theory were true, it does not necessarily mean that Miyu's constitution is in line with this theory.
If even Miyu's love interest is being manipulated by her reproductive instinct, she shouldn't even be interested in me.
Even if there are physical restrictions, my heart will no longer be swayed.
Because her best partner, myself, exists from the very beginning.
So, paradoxically, there are reasons why Miyu likes and dislikes people.
It is true that Miyu feels very disgusted when a talented and manly man confesses to her.
However, this phenomenon has nothing to do with the reversal of reproductive instinct.
If I think about it that way, it's not that difficult.
Miyu lamented that it was annoying to be confessed to.
So much so that she developed an unemotional personality.
I say unemotional, it's more like harsh at this point.
A man like me wouldn't be able to confess his feelings if she treated him with such a strong attitude.
This is an impossible task for a man who considers himself a failure, lacks confidence in his abilities, and lacks the courage to jump in recklessly.
In that case, for Miyu, who is deeply fed up with confessions, talented and manly men who have a high chance of being confessed by would be now considered enemies.
Therefore, the root of Miyu's disgust lies in survival instinct rather than reproductive instinct.
I didn't have confidence in myself, so I didn't notice this difference in vectors.
What can I say, I'm an idiot.
Miyu said from the beginning, 'I'm happy and I know the answer.'
The person who was making Miyu unhappy was none other than myself.
"...You look better now, don't you."
Yuka was looking at me with a bored expression, but deep down she had a gentle expression that resembled compassion.
"If that's the case, it's all thanks to Yuka. I'm truly grateful."
I didn't expect to be encouraged by Yuka.
Come to think of it, from what I've heard from the past, this girl was the one who took care of people to the greatest extent.
"I've already given up on Miyu. Make sure you make her happy."
"I know. I'll make sure she's happy."
Together until the end.
There will be many hardships, but together we can overcome them.
I can believe that now.
"Ahh. Miyu dumped me, and Onii-san won't be my partner either. I'm going home."
"Are you sure? I'll pay for it..."
Just when I thought I could finally escape from this punishment room.
A small vibration sounded in the room.
The sound source is the vibration of my smartphone.
It was a reply notification from Yamamoto-san who sent a message earlier.
'Sorry, I was taking care of my little brothers! I can meet you now, so come to my house.'
It said.
The notification screen of my smartphone.
Yuka was staring intently.
"Wait!! What is this!?"
Oh no, a terrible accident happened at the worst possible timing.
"Wait!! No, this isn't like that...!"
"What the hell do you mean it's not like that!? It's not like you're absolute scum for going to another woman's house at such a time though!!"
Yuka took a series of pictures of my notification screen with her smartphone with a devilish look on her face, quickly sent them to Miyu before starting a phone call.
I wanted to forcefully stop her, but I was reluctant to settle for a violent solution, so I tried to persuade her somehow.
"Yuka, calm down. This is just someone I'm consulting. So, it's the exact same as this situation right now."
"There's no way it's the same she's a girl Miyu doesn't know I know all the girls' names at school then without my knowledge she started flirting with some other person and started having feelings for each other I heard from Haruka that Miyu seemed to be very happy and after thinking about it over and over again I finally gave up and accepted you but the fact that you ended up getting together with another woman without her knowledge even if my hands are covered in blood I will condemn you."
No good, she's completely lost it.
Making excuses only adds fuel to the fire.
"Miyu!! Did you see the message!? This guy is cheating on you!! He betrayed you... Eh!? An acquaintance!? There's no problem? Wait, wait. Miyu, did you read the message properly? He's going to her house... Isn't that a problem? You're joking, right? ...Wait, ehh!? Isn't going to her house the same as actually having sex?"
Yuka's face is busy changing between a serious face and the mask of an ogre.
From what I can hear of the conversation, it seems like things will somehow settle down.
From then on, no matter how harsh Yuka's advice was to Miyu, it went through one ear and out there other, and eventually all of the anger disappeared from her tired expression.
Finally, Yuka asks Miyu with a straight face.
"Then, if that's okay, can I have sex with Onii-san too?"
It was a struggle until the very end.
"Not today? What do you mean today? I don't know what that means though? I want to do it now, but I can't? Yeah. Yeah... I understand."
Yuka cut off the call with a sullen look on her face.
Apparently, Miyu also issued a ban, but I'm really curious as to what she meant by 'not today.'
"Haah. I don't understand anymore. Yuka-chan will stop thinking."
"I think that's good."
At this moment, Yuka looked like a normal girl.
“However, there was one thing I learned from today’s talk.”
Yuka looked healthy beyond thought.
Rather, she has a shinier face than before.
"I don't really understand, but Miyu said I can't have sex with Onii-san today, so that means I can do it from tomorrow onwards, right?"
"Unfortunately, that seems to be the case."
What was Miyu's intention when she said that?
I'll get her to tell me about that when I get back.
"But, to be exact, that's only if Miyu and I agree, and I haven't said it's okay to do it yet."
"Hmph. As long as I have Miyu's permission, it'll be a breeze."
Yuka looked at me cheekily and smirked.
I will definitely not lose to this girl.
"So, the important thing's from here."
"What is it?"
I'm assuming that Yuka's going to ask me to have sex with her, which is an extremely pointless assumption, but I just ask because it's the most important thing to do right now.
"For me, it's about time I had healthy sexual interaction."
"What is 'healthy?'"
"It's not about orders or punishments, it's more about respecting each other's dignity, it's about modesty and love..."
"Have you ever had normal sex?"
"Not a single time!!"
Yeah, well, it was her first time, and neither Miyu nor Haruka were in love with Yuka.
"Okay? Next time we have sex, be gentle, okay? Next time you rape me, I'll make you treat me to a deluxe jumbo parfait from the store across the street."
"How much is it?"
"3,500 yen."
"Expensive!"
I never thought it would easily surpass sirloin steak.
"What are you talking about? If it's a drink set, it costs 5,000 yen including tax."
"Does it cost 1,000 yen for a drink?"
"Yeah."
That's a painful expense.
Even though it's just assumption, I have to be careful.
...To be careful not to rape her.
"Then go see that woman I don't know. Don't do anything erotic to her."
"I said I won't."
"Well, if you want a junior high orgy with Yuka-chan, I can set it up for you."
"I won't do that!!"
I hope that these junior high school girls, whose moral values are messed up, lead decent lives and build healthy families.
I prayed deeply from the bottom of my heart and went to meet Yamamoto-san.
"Nn...?"
Wait what?
I'm going to see Yamamoto-san.
What was I supposed to talk about with her--

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