My Little Sister Is the Best F*p Material - Volume 2 Chapter 11: It's Wrong to Fall in Love with Your Sister

Volume 2 Chapter 11: It’s Wrong to Fall in Love with Your Sister

The summer vacation for students is a strange thing. As August approached, the number of unreasonable tasks that the teachers began to issue one after another gradually eroded the sense of liberation. Combined with the weight of the textbooks left in the classroom, the bag I carried home was weighed down with a sense of depression.

Next year, I would be facing entrance exams. I wanted to enjoy my last long vacation as a student, and in class, I began to hear about plans for assignments and trips.

In those days.

I was having sex with Sachiko almost every day.

“Aah… Aaan… Onii-san… Nnnhaaahh!!”

“Sachiko… It feels good, inside, it feels so good…!!”

Without even sparing a thought for the creaking bed, I was possessed, having sex. There were no words of love, no techniques. I was just indulging in a sexual act, driven by my desires.

Sachiko’s long hair was stuck to her skin with sweat, and her unfocused eyes were staring at me. The blanket had long been kicked to the foot of the bed, and the wrinkles in the sheet told the story of how intense the act had been.

“Nfuuaah… Ah, so rough… nooo!! Ahhn…”

“Sachiko… Ahh… I’m gonna cum… I’m gonna cum, Sachiko…”

I hugged Sachiko, feeling her body temperature and scent all over me, and ejaculated inside her vagina. I tried not to think about Miyu. I tried to chase away the shadow that flickered in my head, and I reached my climax with Sachiko’s body.

The semen, which was spit out into the liquid reservoir of the condom, “Byukku, byukku,” had become so thin that I could feel from the urethra that there was little sperm, and it was almost like urine.

On the floor, there were two used condoms wrapped in tissue. It had been three rounds in a row. Considering the amount of semen I used to ejaculate into Miyu’s mouth, the amount of semen I ejaculated into these condoms was barely enough for one round.

“We’ve already had sex three times. We had sex yesterday, too. … Are you that backed up?”

Sachiko was exuding the joy of having her desires directed at her by a man, but she couldn’t hide her fatigue, and she narrowed her eyes in resentment.

“I guess so.”

My heart was cold, in stark contrast to the fiery sex.

I already knew. Even in the sex just now, I hadn’t been able to ejaculate without thinking about Miyu. I was just fueling my sexual desire by using the sense of sin of having a sexual relationship with my sister. In the end, I had never been able to have proper sex with Sachiko.

“When does summer vacation start?”

“It’s next week. But the summer crash course starts right away.”

Since both of us were in schools with three terms, the end-of-term ceremony was held on roughly the same day. I was planning to do some event staff work during the summer vacation, but now that I had a girlfriend, I was still short of funds. I should consider a long-term part-time job.

“Shall we go downstairs?”

“Yes!”

Sachiko jumped out of bed and quickly changed her clothes.

From now on, the two of us were going to cook together. We went to amusement parks and some tourist spots, but in the end, the most enjoyable time was spent studying and cooking at home. Those things are best left for occasional holidays.

Above all, I was happy to see Sachiko enjoying cooking together. Since I couldn’t have proper sex with her, I wanted to do something at least a little like a couple.

“What are we going to make today?”

“I have a lot of leftover cornstarch, so I’ll make something with a sauce.”

The dishes I made with Sachiko were the ones I was responsible for at home. In other words, they were the ones I made for Miyu to eat. It wasn’t enough to just grill a lot of meat like a man. I had cabbage and carrots, so I’ll just combine them with some pork.

“You’re always so efficient, Onii-san.”

After putting all the ingredients and cooking utensils on the kitchen counter, I was cutting vegetables on the cutting board, and Sachiko was observing me intently. Sachiko was washing the vegetables and peeling them.

“Maybe it’s thanks to Miyu. When I was helping my mother with the housework when I was little, Miyu kept telling me to pay attention to my posture and all that.”

Before Miyu became quiet, she would butt in and tell me to do this and that whenever I did something. At the time, I only thought of her as a selfish and noisy little sister, but now that I think about it, she was like a second mother, and I was grateful for it. … Or maybe she still is.

“I didn’t know Miyu-chan could be so bossy.”

“She seems indifferent to everyone at school.”

“But she’s secretly kind when she’s down.”

It seems that I’m the only one who knows about Miyu’s past. Did she have any friends before she was in third grade, when she was bright and sociable?

“I’ll serve the rice that’s cooked.”

After having sex, eating, and being satisfied with the conversation, it was time to disband. Miyu rarely came home late, so I always made sure to eat the food while it was still warm. I didn’t want to change that.

I set the dishes on the table, and Sachiko and I sat across from each other. I liked it better when she had her hair in a side tail. When we had sex, I had her let her hair down so that I could ejaculate more smoothly, but…

The topics that came up between the two of us were events at school. That was still healthy, but Miyu had shown Sachiko the erotic games and other things I had as reference materials for sex, so there were also many questions about the two-dimensional aspect. Since Sachiko didn’t show resistance to most things, it was nice to be able to talk openly about my hobbies.

“When did you start playing erotic games?”

“It was a little after I entered middle school. I was depressed because of some minor trouble, and a bad friend of mine tempted me.”

“What was the trigger for that person to start?”

“It was left by his older brother who was leaving home.”

“There are no good-for-nothings anywhere, are there?”

“Absolutely.”

Talking to Sachiko was fun. Above all, it was relaxing. But something was different. Even though we had been together for a month, I couldn’t feel the sense of being together.

I thought it was just because of the way we met, but when I was having dinner with her, I could see that clearly. Sachiko was like a sister to me. She was like a second sister with whom I could have sex. She was easy to be with, but I didn’t feel any deeper emotions for her.

It’s a strange story. I have clear feelings of affection for my real sister, but I feel like a parent to a girl who isn’t related to me by blood. Normally, it should be the other way around. Was it Miyu who made me like this? Or was I born with such a disposition?

That can’t be true. Common sense tells me that siblings don’t fall in love with each other. There is even a theory that humans like genes that are farther away from themselves in order to leave behind stronger offspring.

I played too many erotic games with a sister theme, and I was taken care of by my sister in various ways. In the process, my sensibilities went awry.

I don’t like Miyu, and I don’t masturbate using her as a sexual aid. I don’t even ask her for a blowjob, let alone have sex with her. I don’t even want to grope her breasts just because she’s big-breasted. Because Miyu is my sister.

That’s right. Miyu’s charm is that she’s good at taking care of others. That’s all. I became distrustful of women after being severely teased by girls in middle school. It’s only natural that I would admire her, even if she is my real sister, when she is kind to me. It’s just that my brain is paralyzed by the gap between the brutal image I had of women and the reality.

Miyu is not special.

She’s just an ordinary sister, like the ones you find in any family.

“Onii-san? Is something wrong?”

I was startled when Sachiko was concerned about me. My chopsticks had stopped.

Since I took a bath with Miyu, all I could think about was Miyu. No matter how much I tried to shake her off, Miyu wouldn’t leave my head. And there was my girlfriend in front of my eyes.

A girlfriend, who I was dating.

Yet, she was here, in this place, right now.

“Sachiko…”

I don’t know if the expression “by accident” is appropriate. But I thought this was the only timing.

“I want to talk about something.”

I had been with Sachiko many times. But there was no sex as lovers there.

“What is it?”

“Actually…”

I took a deep breath, prefacing that it might be difficult to understand. I had never told anyone this secret. I only told Sachiko about my troubles about me, so that Miyu wouldn’t be bothered.

“When I had sex with Sachiko, I was always thinking of Miyu. Because Sachiko’s voice was similar to Miyu’s.”

I had to say it that way to explain it succinctly.

“Hoe…”

Sachiko froze, her mouth agape. She couldn’t understand what I was saying. But that was the inescapable fact.

“In the first place, the reason Miyu started that girlfriend recruitment was because I couldn’t ejaculate without using Miyu as a sexual aid.”

As I was talking, Sachiko’s gaze gradually lowered. Maybe I shouldn’t have told her, since it was just something I felt guilty about on my own. But I didn’t want to continue the relationship of betrayal with such a young Sachiko.

I tried to have sex with Sachiko, thinking only of her. But in the end, I couldn’t ejaculate without Miyu’s influence. I could only use my body. That would be the ultimate insult for a woman.

“Even though I knew that , it’s still a little shocking to hear it.”

“I’m sorry…”

Right after I apologized, Sachiko’s words echoed in my head.

“Eh?”

Wait, what do you mean by “I knew”?

“It’s more like I thought it might be possible.”

Indeed, I couldn’t feel the sense of depression that I had imagined in Sachiko. She might be hiding her true feelings, but even so, would you consider the possibility that a man, even your brother, would use his real sister as a sexual aid?

“Actually, there’s something I’ve been keeping secret from you.”

The two of us switched positions. What kind of secret was going to be exposed at this last minute?

“It’s the same for me.”

Sachiko blushed and covered her cheeks.

“I can’t forget the pleasure I felt the first time Miyu fingered me… I was in a daze when I was having sex with Onii-san…”

Now it was my turn to open my mouth in surprise. I was aware that I had been having sex with Miyu’s phantom, without any technique or love. Still, I had convinced myself that my sex was enjoyable by seeing Sachiko’s disheveled appearance.

“Seriously…”

“Seriously.”

What does this mean? While we were in a relationship as lovers, were we both thinking of the same person? And that relationship was, on one side, a real sister, and on the other, a friend of the same sex.

Where did we go wrong?

“We were dating, weren’t we?”

The question that had been rekindled. The sense of reality, which had been thin to begin with, became even thinner.

“I’m still your boyfriend, but Onii-san still likes Miyu-chan, doesn’t he?”

“I don’t like her… I mean, I do like her. Well, I do.”

Although I shouldn’t admit it, in this situation, I had no choice but to admit it.

“I just wanted to know what would happen if I had a boyfriend, so it doesn’t matter to me either way.”

The two choices implicitly indicated by “either way” were, of course, whether to continue the relationship as lovers or not.

If I thought about Miyu’s sake, I shouldn’t break up with Sachiko. After all, she had introduced me to her girl friend, and if I broke up with Sachiko, I would be left with only Miyu again. There would be no room for improvement.

But if I were asked if this was a natural lover relationship, the answer was definitely no. Even if I continued this relationship, I wouldn’t fall in love with her any more. We would waste our precious youth, and it would be terrible if we got even more tangled up than we are now.

“Is it better for us to be friends?”

“That might be the case.”

The decision was made quickly. Such a distorted relationship should not be continued. Looking back objectively, it was the only choice.

We were going to go back to being just acquaintances after this meal. We cleaned up the dishes together, said goodbye at the entrance, and our relationship as lovers was over. – That was the plan.

“Can I ask you one more question?”

“Hmm, what is it? Since we’ve talked so openly, I’ll answer anything.”

I had no idea that this casual conversation would trigger such a shocking exposure. I never expected it, and I shouldn’t have said I’d answer anything.

“You know the circumstances of the class, so you didn’t feel any discomfort with Miyu-chan being mixed in with our sex, did you? At the time, I was also being messed up by Miyu-chan, so I didn’t have time to think about it.”

Sachiko was sitting on the carpet in the living room, facing the sofa. And as she talked about her first sex, blushing, she tapped the sofa seat.

“Here, you ejaculated into my mouth, didn’t you? It was so bitter that I couldn’t swallow it.”

I was standing by her side, listening to Sachiko’s story, and I was already sensing an ominous atmosphere.

“Miyu-chan licked the semen from Onii-san’s mouth and drank it instead, didn’t she? Why?”

Sachiko’s question temporarily stopped my breathing. I was being asked a dangerous question. Since it was a fact that Miyu drank my semen in front of Sachiko, I couldn’t deny it.

Sachiko, driven by curiosity, asked me this because it was unthinkable that a girl, even a brother, would drink a man’s semen, and because she knew Miyu’s dry appearance in class, she inferred that there must be some extraordinary reason behind it.

However, I couldn’t tell the whole story for Miyu’s honor. I had to skillfully evade the question with information that was not a lie.

“The reason I accepted her suggestion for that girlfriend recruitment is related to that. At the time, I was out of my mind. I made her drink it by force. Because I couldn’t get off without Miyu, my sexual desire was overflowing, and I was afraid I would go after other girls if I didn’t do something.”

“Solve family problems within the family?”

“For Miyu, it’s more important to be polite than anything else.”

“I see. I don’t buy it.”

“…”

I had forgotten, but Sachiko was excellent in everything except sexual knowledge. This is a tough one. I don’t have the confidence to talk my way out of it. When it comes to this, Yuka would probably just push it through.

“But I understand that there are circumstances that you can’t tell me about.”

And above all, she was smart. Sachiko had a smart head that didn’t waste her energy on useless things.

“Did you have sex with Miyu-chan like we did?”

“No, I negotiated with Miyu in small steps, and in the end, I just ejaculated on my own, and she just drank it. That’s why the recruitment was based on sex.”

“Hoho.”

Sachiko was not satisfied, but she didn’t seem to want to dig deeper. Well, the last one wasn’t a lie.

“Onii-san was thinking of Miyu-chan when you said that you couldn’t ejaculate without her, right?”

“Yeah.”

“Then, can I try to make you ejaculate myself?”

Why does it come to this? I wanted to say, but I held back. In order to avoid being pursued, I had no choice but to accept the request quietly. This was also for Miyu’s sake.

“What do I have to do?”

“I’ll sit on the sofa, so please sit in front of me.”

Sachiko called me to the sofa after kneeling and sitting down. As I approached the sofa, Sachiko pulled down my pants before sitting me down.

“Then, please take off your pants.”

“Are you going to do something naughty?”

“Please let me.”

Sachiko asked me, and I gave in and took off my pants. Since I had been using her as a sexual outlet, I had to go along with it if Sachiko wanted to have sex.

“Kohon.”

Sachiko coughed a few times, and then, after making me sit on the sofa, she brought her mouth close to my ear.

“Onii-chan. Get an erection.”

“────huh!?”

My penis, which had shrunk and curled up, was the first thing Sachiko said when she saw it. The voice from behind sounded like a real Miyu whispering in my ear, and my penis hardened instantly.

“Sachiko, that’s not good…!!”

“It’s okay. Miyu-chan won’t do it, right? So, think of this as a farewell service.”

Sachiko began to gently rub my erect penis with both hands.

“Nfu… it’s so hard and hot…”

“Uu… uunn… aah…”

Miyu’s sensual voice whispered in my ear, and what was just a handjob became an incredible sensual play. With each breath of the impersonated Miyu that brushed against my ear, my entire body became more sensitive, and my penis grew to an enormous size.

“Wow… it’s amazing… Onii-chan, why do you get bigger when your sister gives you a handjob than when you have sex with other girls?”

The worst possible use of the educational materials that Miyu had given to Sachiko was this. The way she spoke, which was unknown to ordinary girls, was something this excellent student had thoroughly studied and mastered.

That seriousness was also reflected in her handjob skills. When Sachiko saw that my penis had grown so big that it was overflowing, she used one hand to press down on the base, and with the other, she rubbed the excess.

“N, nuu… aah, aah…”

“Hehehe. Onii-chan, you make such a cute sound.”

“Haa, uuu… aah… Sachiko… this isn’t good… aah, uaaah…”

Twisting my body in an unprecedented pleasure, I begged for forgiveness, but Sachiko seemed to be completely ignoring me.

“You made her suffer so much, yet the tip is already dripping and you’re about to cum… You’re an early ejaculator, aren’t you? You’re such a weakling. It’s pathetically fast.”

And then, finally, the link was made. The speed at which I usually ejaculated, which Miyu had scolded me for, was pointed out by Sachiko, and my ejaculatory desire exploded uncontrollably.

“Aaaaaah, aah, I can’t hold it… I’m cumming…!!”

Buru, bu— and with that, ejaculation was over.

“Aah, aah…! It really came out.”

Sachiko was surprised and hurriedly covered it with her hand, catching the semen. Both her hands were now soaked in semen.

Then, after carefully feeling the texture with both hands, Sachiko said,

“Hehehe.”

She became a little bit of a bad girl from that moment on.

“Sachiko, I can’t take it anymore… u, aah, aaah…”

“If you’re still this hard, there’s no such thing as ‘can’t take it’ anymore, right?”

“I can’t take it… really, I can’t… aah, aah… uhh, guah, haaaah…”

My body, which was linked to the pleasure of Miyu, recognized that pleasure as a target for ejaculation. Even during the sex we had so far, I was able to ejaculate without thinking about Miyu, but that was because I had repeated sex with Sachiko, superimposing Miyu.

My body, which had learned to ejaculate from Sachiko’s whispered handjob, was now at her mercy.

“If you don’t want to be made to ejaculate, don’t get an erection. If you get this big, you look like a beggar.”

Sachiko’s breath blew against my penis, and it was rubbed with a squelching sound, and even her polite words now sounded obscene.

“Uhh… guh… aah… haa…”

“Your abdominal muscles are twitching. Can you hold back in that state? But it looks like it’s trying to come out.”

Sachiko smeared semen all over the urethral orifice, which was twitching, and she encouraged my ejaculation by tickling the groove. There was no way I could hold back.

“Aah, aah—!! I’m cumming… I’m cumming…”

Buku, buku, buku…! Without any resistance, I added more semen to Sachiko’s palm. Even though my penis was still erect, it was tormented relentlessly, as if to say, “It’s your fault.”

“Sachiko… a, aah… I can’t take it anymore, please forgive me…”

“Forgive you? It sounds like I’m punishing you… But for a man who only used me as a hole for ejaculation, this might be a good punishment.”

Sachiko’s voice was filled with pleasure, and she gripped my shaft tightly.

“If you’re reflecting on it, please be my rod for climax.”

From then on, Sachiko made me ejaculate like crazy. Even her cruelty was similar to Miyu’s, and I was completely at her mercy, as she squeezed every drop of semen from my testicles. It wasn’t the way a girl who had never seen a male organ a month ago would squeeze.

“Sachiko… Sachikoo… aaaah… aaah…”

In the end, I was only doing muscle contractions, and the hellish semen lotion handjob was over. After sex, I was so confused that I didn’t know what was going on.

“You produced an unbelievable amount of semen. Hehehe. I finally squeezed you dry.”

Sachiko looked at her hands, covered in semen, and seemed to be lost in thought for a while. Seeing that I was unable to move due to ejaculation, she said it was almost time for Miyu to return, so she cleaned my penis as well.

She wiped the semen with tissue, put it in a plastic bag, sprayed it with a deodorant, rolled it up, and pushed it deep into the trash can. When Sachiko returned, she had a fresh face.

“It’s fun to make a man ejaculate.”

I don’t think it’s a sentence to say with such a bright smile, but maybe I awakened something unsavory in her.

“I’m sorry for doing this to you at the last minute…”

I finally snapped out of my daze and, holding my aching crotch, I managed to stand up with sheer willpower.

“No, no. At least, I’m glad that my first partner was you.”

“Thank you. I’m sorry I couldn’t take you on a proper date. But, I had fun.”

I waited for Sachiko to put on her shoes at the entrance, and we went outside together. The surroundings were already dusk. Miyu would be home soon. Looking up at the sky, I let my guard down, and Sachiko turned around and whispered in my ear.

“I hope you can have sex with the real Miyu-chan.”

“T-That’s, you know…”

“Hehehe. I won’t say anything to Miyu-chan. But, if you want to be in such a relationship with her, I’ll support you. Just remember that.”

Sachiko conveyed that message to me, and then, with a bright smile, she returned home. Her dazzling smile, which left an impression on the back of my eyelids, made me feel a hint of loneliness, and even after she disappeared from view, I continued to bid her farewell for a while.