My Little Sister Is the Best F*p Material

Volume 2 Chapter 1: Forced Sex with an Ignorant Girl

On a slightly late breakfast on a holiday, I was in the living room with Miyu. I had just finished doing the dishes in the kitchen and was wiping the table, which was now clear of dishes.

Since my real little sister, Miyu, caught me masturbating to a sister-themed erotic game, she has been orally taking care of my ejaculated semen, twisting my sexual preference and making me unable to get aroused without using her as a sex object.

To help me get over my sister complex, Miyu is looking for someone to become my girlfriend. She is using photos of me that I don’t even know how I look in to ask our school friends if they would become my girlfriend. Is this the life I should be living, where my sister takes care of my sexual needs and even my girlfriend-making?

“How do you plan to look for her?”

I looked at Miyu, who was lying on the carpet, playing with her phone after I wrung out the dishcloth and hung it on the kitchen hanger. She was using her large breasts, which were disproportionate to her small frame, as a cushion, and her long, glossy black hair was spread out on her back, reaching down to her waist.

“I plan to post a message in the group chat.”

“How so?”

“Since it’s a group chat, I just have to type a message. Let’s see… I’m looking for someone who is willing to have sex with my Onii-chan and be in a relationship with him…”

“I got it. I’ll think of something.”

“I already sent it.”

“Hey!”

I quickly ran to Miyu, and there it was, a message with those exact words in the group chat. There were forty members in that group.

“Won’t this message make things awkward for Miyu?”

Can a girl publicly use the word “sex”? I mean, unless she’s a cheerful, trendy girl. But Miyu is a quiet character even at school.

“This group is fine.”

Where is it fine? Miyu showed me the photos posted in the group, most of which were of someone being undressed or tied up, and I started to worry about the future of these girls in the group. They were all the same age as her.

As I scrolled through the past messages, it seemed like some of them were even reporting that they had boyfriends. Because there were so many people in the group, the conversations weren’t too toxic, which was good for my mental health. They were also sharing their thoughts on new cosmetics and their favorite idols. And now, my photo and a message looking for a girlfriend were posted in this chat group. What kind of humiliation play is this?

The read counts started to increase rapidly. It felt like my heart rate was being counted. Despite the large number of read counts, there were no replies, as if they were all restraining themselves.

“Wasn’t it a bit too much to say that sex was part of the requirement?”

“But I need someone who can help with Onii-chan’s sexual needs.”

Do they really think I have such a strong sex drive? It’s all Miyu’s fault that I’ve been masturbating so much… Well, I’ve been doing it almost every day since I started playing erotic games. Regardless of the amount I ejaculate, if I get a girlfriend, will I be having sex every day? I still don’t really understand what it means to be in a relationship.

“Hey, you got a reply.”

I held my breath as I heard the notification sound, “Picon”. The subsequent responses to the first message were quick.

[I don’t mind going on a date with Onii-san, but can I also have sex with Miyu atleat once?]

[I’ll consider it if it’s a threesome with you, Miyu]

[Will I get a reward from Miyu if I just have sex with your brother?]

[If I marry Onii-san, can I live with you?]

[Miyu, let’s have sex.]

One after another, comments addressed to Miyu kept coming in. I was frozen in front of the screen.

“Everyone just loves me too much, you know?”

I don’t think this is a matter of liking or not liking. I understand that Miyu is well-liked by others. But why are all their requests sexual?

“Just so I know, what kind of group is this?”

“In simple terms, it’s a group where girls sexually harass each other. Originally, it was a fan club for Haruka.”

I’m sorry, but even if you put it simply, I still don’t understand.

“Haruka… as in that Haruka? Is Miyu also a fan of hers?”

“I’m the supervisor. Sometimes there are people who take secret photos, so I punish them. And then, somehow, it became my fan club.”

“I’m still confused.”

Shouldn’t these girls all be called in by the student guidance counselor? It’s way too unhealthy, no matter what. When I was in school, it was a perfectly normal school. Is this the kind of generation we’re in now? Also, all the requests are for Miyu, and there’s no way any of these girls would want to become my girlfriend…

“A few of them are coming to my pms too.”

“Oh…”

This unexpected development made my heart start pounding again. I was worried about how they would react, but Miyu displayed a list of pms without any concern. There were three new messages, and Miyu selected each of the girls’ rooms and deleted them without even checking the contents.

“What are you doing!? Hey!”

“These girls aren’t cute.”

Miyu kept deleting the messages that came in one after another. Of course, it’s better to have a cute girl as my girlfriend, but I don’t have the confidence to treat her well enough to match her level.

“Maybe it’s better for me to get used to an average girl first?”

“If you start with an average girl, you’ll only learn how to treat an average girl. Besides, if you take these girls to a nice restaurant, they’ll be satisfied with the date already. The important thing is whether they can satisfy Onii-chan in bed.”

I admire her determination not to lose sight of her goal. However, is there really a girl who meets those conditions?

“Hmm…”

Miyu’s hand, which had been continuously deleting messages, stopped. Could it be that she has finally appeared—a cute girl at Miyu’s approved level who is willing to have sex with me?

“It’s Sachiko. She doesn’t even understand health and physical education.”

“I didn’t know there was such a pure girl in this group.”

“Well, she hangs out with the sexual harassment group a lot, so I don’t think she’s completely clueless. But whether she can satisfy Onii-chan is questionable. She might be a dead fish.”

It’s tough being the older brother when such provocative statements keep coming out of my sister’s mouth. I guess Miyu’s ears have become more refined because of these kinds of girls. I’ll refrain from asking about the nature of the “sexual harassment group” for now.

“But she’s cute, right?”

“Her face is good. So let’s start with her first.”

It seems that Miyu has also judged that Sachiko is satisfactory. But, since she doesn’t have any sexual knowledge, that means she’s a virgin… Is it okay for me to take her virginity?

“What is she saying?”

“She says she’s interested in a relationship, but she doesn’t really understand sex.”

“That sounds like a terrible idea.”

If she’s too ignorant, I’ll feel guilty. It feels like I’m forcing her, and I wonder if she’ll sue me later when she finds out what kind of act it was.

“I’ll explain the circumstances to her, so you just have to make sure you don’t break the flow.”

So Miyu will set everything up. It’s embarrassing. Even making my girlfriend and losing my virginity, my entire experience as a man is being managed by my sister, and I can’t even face my parents or my future wife.

“Hey, Sachiko? Where are you now?”

While I was thinking about all this, Miyu was already making a phone call. I want to learn from her drive. I have to make up my mind soon.

“Are you going to cram school now? If so, you can come here after calling in sick. I’m getting a lot of responses, so if you don’t come, I’ll have to contact someone else.”

I’m scared of the unscrupulousness that Miyu shows in every part of her body. It may sound good to call her capable, but it’s still scary to be able to lie so smoothly without any hesitation.

“Sachiko said she’ll come.”

Miyu ended the call without showing any expression. She even made her cancel her cram school schedule. So, am I really going to have sex with this girl? I still can’t keep up with the reality, and my body feels light.

“Hey, how much longer will she take?”

“About fifteen minutes?”

“That’s fast!?”

My appearance has been taken care of by Miyu, so there’s no problem there, but do I need to make the bed or clean the room? It’s a good thing that I got rid of the erotic games and other stuff as promised to Miyu.

“Damn! I don’t have time to take a shower!”

“You don’t have to.”

“But at least I should smell good…”

“She’ll be coming here in this heat, sweating. Why don’t you wait until she says she wants to take a shower?”

Miyu stood up with a smooth, straight posture that showed not a trace of anxiety. Come to think of it, that’s right. Our perceptions of being considerate are too different. I’ll just stay quiet from now on. It’s best to go with the flow when it comes to long things.

“I’ll greet her first, so you stay in the living room and sit down.”

“Ah, okay. I understand.”

Miyu left the living room and closed the door. After waiting for about ten minutes, I heard footsteps approaching the gate of the house from outside. From inside the room, I couldn’t see the visitor’s face because the curtain’s lace was blocking the view.

According to Miyu, she’s cute, so I think it’s okay to have high expectations, but if she’s too cute, it’ll be a problem. If we can’t even have a conversation, we might not even get to the sex part, let alone apologize on the spot. Come to think of it, that’s how it’s supposed to be when making a girlfriend. First, you get to know each other, become friends, then engage in a romantic chase, and only after becoming lovers, you move on to the night flow. What I’ve done, meeting and even skipping the process of getting to know each other, is an extreme deviation.

“Excuse me…”

Since Miyu greeted her right away, the intercom didn’t ring. Maybe because of the low tone, her voice was similar to Miyu’s, and if it weren’t for the way she spoke as a visitor, I wouldn’t be able to tell who was talking.

It seemed from the conversation at the entrance that they had some sort of relationship, and the atmosphere was friendly. Well, it was friendly in the sense that it was Miyu, who wasn’t exactly chatting and laughing, but rather, was able to have a conversation without any reservations.

“Onii-chan is inside. Greet him and then start having sex.”

I thought I had misheard. So the talk of having sex has already progressed to this point? Isn’t that a bit too hasty? I don’t even know when the right timing is to kiss. Even virgins know that the first time having sex can be a miserable memory.

“Onii-chan, I’ll introduce her.”

Before my heart could calm down, Miyu opened the door and came back in. There was a figure behind her. It was finally time for us to meet. I was nervous.

“Hello. I’m Sachiko Konoe. Nice to meet you.”

As she bowed, her side tail swayed. The cherry hair accessory and the hair that fell down to her shoulders made her look more mature than her age. I had imagined her to be about the same height as Miyu, given her modest tone, but she was actually taller than average. Her outfit was simple, a combination of a T-shirt and a skirt, suitable for summer, and her chest was well-developed enough to match her height.

“Uh, err… Nice to meet you.”

It should have been “Nice to meet you,” not “Uh.” How pathetic I am, not even being able to do the same thing as younger girls. Come on, I have to become a man…!

“Sachiko, sit next to Onii-chan.”

Prompted by Miyu, Sachiko-chan came and sat next to me on the sofa. After saying, “Excuse me,” she sat down, leaving a gap of about one fist between us. This is… close, right? It seems that my first impression wasn’t that bad.

Sachiko-chan was sitting with her legs together, her back straight. Miyu was interviewing us in a format where we were sitting side by side. It was like a couple-type AV that gets picked up on the street. My heart is dirty. Stop it, calm down, first you have to see this girl as a human being.

“Um, Konoe-san… is that weird? Is it too familiar to call you Sachiko-chan?”

“You can call me Sachiko. My friends and teachers all call me by my first name.”

“Oh, okay. Sachiko it is. Nice to meet you.”

Miyu had said that my advantage was being older. That meant I was expected to have age-appropriate composure. I can’t lose my nerve. I have to be bold.

“Sachiko, how was cram school?”

“Oh, um… yeah…”

That was a failure from the very beginning. Sachiko was trying to cover up with a stiff smile, and cold sweat was running down my back. I shouldn’t have dug up unnecessary things. …The look from Miyu was painful.

“You can make up for the time you missed by having Onii-chan teach you.”

“Yeah, that’s right. Your brother is good at studying, right? That’s reassuring.”

“I’m not that good, but…”

That photo was taken by Miyu to show that I was serious. I don’t want to be expected too much. I’m not good at studying.

“Onii-chan is a hard worker, so he’ll study with you. Since he’s not working part-time now, he can be your partner anytime. Why don’t you try going on a library date?”

Miyu’s nice follow-up. I was saved. This girl is really capable.

“So, what do you think? Can you go out with Onii-chan? Of course, Onii-chan has no complaints, right?”

And then Miyu started pressing me without any regard for the flow. This kind of forceful approach won’t work.

“I don’t mind, but what about Onii-chan?”

“Huh!? Yeah, of course…”

At least my first impression wasn’t lacking.

“Okay, you’re a couple now. Congratulations!”

“Yay!”

Miyu and Sachiko clapped their hands happily. Huh? What? Huh? What just happened? Did I just get a girlfriend? In an instant? Without even a confession?

“Then let’s have you guys have sex.”

“Uh, yeah. Well, I don’t really understand, but can you teach me?”

“Leave it to me. I’ve already collected all the data from Onii-chan’s computer and studied it perfectly. Come here, Sachiko.”

Miyu had Sachiko sit in front of me and put on her glasses again, switching to teacher mode. I didn’t know where to start with my comments.

“It’s an extension of the bad things you’ve been doing, but is that okay?”

“Huh!? I, I haven’t done anything bad…”

Sachiko’s face turned red. I was completely left behind. Is the “bad thing” the act that girls do alone? Because of her ignorance, she can remain calm when the word “sex” is mentioned, but she gets so embarrassed when she’s pointed out for masturbating. But from that reaction… she’s doing it, isn’t she?

“Hmm? We’re going to go way above what you’re doing, is there any point of hiding that?”

“Hide… I’m not that kind of bad girl…”

Miyu, with a very bad expression, climbed on Sachiko’s back from behind.

“I heard from your friends? They taught you how to feel good, right?”

“That… is…”

“But you should have learned from them that it’s a place where your lover touches you, right? Yet you’re doing it yourself, aren’t you, Sachiko?”

“Uuuu…”

“Sa-chi-ko”

“Hauu, I’m sorry… I heard it was bad… but I wanted it so badly that I did it myself…”

Miyu was stroking Sachiko’s hair as she whispered. Every time Miyu’s lips moved, Sachiko’s body trembled, and it seemed that her body was already beginning to remember that pleasure. Sachiko was supposed to have been called in at the last minute, but she had managed to gather information in such a short time. What did her friends tell this innocent girl?

“So today, Onii-chan will do it properly for you. That’s what sex is, right? Do you understand?”

“Is that so? Then, is sex not a bad thing?”

“Of course it’s a bad thing.”

Sachiko’s body twitched as Miyu’s breath was blown into her ear. Her face, which was flushed to the point of tearing up, was tilted upward. Does Miyu’s breath contain some kind of aphrodisiac?

“I can’t… I’ll become even more of a bad girl…”

“That’s why everyone does it secretly. Anyone likes to feel good. Of course, I won’t force you, so if you want to stop after hearing this, you can refuse.”

Saying so, Miyu hugged Sachiko tightly.

She absolutely had no intention of letting her go.

“Do you want to have sex?”

“Yeah…”

Sachiko was ready in just a few minutes. Miyu’s S-class attack. Is it something she’s naturally good at, or is it something she’s learned from experience? Probably the latter when it comes to that aspect.

This was something I should have done in the first place. But I can’t. I don’t feel like I can do it at all.

I understand. Even if she was innocent about sex and wanted a boyfriend, the reason why Sachiko accepted my relationship so easily was because of her trust in Miyu.

“Then, brother. Sachiko says she wants to have sex.”

Miyu poked my aroused crotch with a pointer.

“Take it off.”

On that day, I don’t know how many times I’ve been given this command.