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Chapter 4

Innocent Girls Are Erotic and Cute

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After using my little sister as fap material, I've begun to see women in a different light.

It's just that since I'm venting my sexual desires to my younger sister, I don't have to lust after other girls.

Even if I don't intend to show it in my attitude, apparently, such subtleties can be conveyed to girls.

This was a pretty good trend.

Especially if it's an unpopular otaku like me, girls seem to feel uncomfortable solely getting affection from a man they are unlikely to like.

Such a man would create an awkward atmosphere just by talking to girls at school.

"Hey Sotomichi-kun, let's go hand out our Social Studies printouts."

A stack of papers is placed on my arms with a thud.

The school's prettiest and most popular girl, smiling with pure white teeth, is my partner for day duty today.

She knows exactly how pretty she is and usually pushes the work she's asked to do to others.

Because she's so pretty, even if I pointed out that she was being selfish, no one would even get angry at her, feeling first-hand the cruelty of reality.

I'm sure she will be loved by everyone in the future.

Kanade Yamamoto.

Even though I used to see her as a beautiful girl as if she was drawn straight from a painting, right now she just looks like an ordinary girl to me.

Yamamoto-san wins overwhelmingly when it comes to raw beauty, but I can say now with absolute confidence.

Miyu really is cute, like I thought.

"20 pages... Can you even call these exam preparation printouts?"

In the sluggish-feeling period before homeroom began, while our classmates sit at their desks and talk about whatever nonsense, we on duty are handing out a large amount of midterm exam preparation printouts that our homeroom teacher has given us.

Social Studies is a subject I especially hate because there are so many things to memorize.

The teacher in charge would probably say that if I tried, I could do it, and if I couldn't, it was a matter of motivation. However, I want him to understand that humans have their own limits.

"Well well. I think most of the content are just exam questions, so it's actually pretty thoughtful of our teacher to give us this many, right?"

Yamamoto-san follows me with her hands behind her back.

She had just completed her work, which consisted of simply distributing math formula sheets one by one.

What a great social standing she has.

Don't you realise that by not doing your work, you just waste time spending it on talking to me?

"Yamamoto-san is good at studying, so it's easy for you to say that."

Studying is a matter of effort.

I don't intend to deny it, but I can't help but envy people who can train their innate intelligence over time.

"It's motivation, motivation. If I said that I'll let you touch my boobs if you get a perfect score on the test, you'd easily be able to memorise 20 pages, right?"

"Woow, I feel so pumped up now."

Boobs, huh... If I brought a perfect score answer sheet back, I wonder if Miyu would let me touch her boobs.

As I continue sorting through the printouts, I vaguely fantasize about something that wouldn't happen.

-wait, no no no.

I could feel it swelling up an excessive amount.

In front of Yamamoto-san, that's definitely really bad.

"Sotomichi-kun."

Suddenly, Yamamoto-san's voice came closer.

Even though it wasn't soft, when I was approached by Yamamoto-san who spoke in a sweet tone, my heart instinctively skipped a beat.

If something like this were to happen to a man who had no experience with women, he would definitely fall in an instant.

I wonder what would have happened if it wasn't for my little sister.

"Could it be that you're gay?"

"What!?"

At those completely unexpected words, I made a strange sound, causing some gazes to turn to me.

I don't know if they were surprised by the suspicions about me, or if they were faulting me for being so close to Yamamoto-san.

"I like women, just so you know."

Trying to assure her, Yamamoto-san tilted her head with her palms on her cheeks.

This cunning woman.

Take a look at my blunt, bitter little sister.

The only thing that moves is her eyelids.

I want you to boil and drink the dirt under her fingernails and take a lesson from her. At the same time, please share some of it with me.

"Is that so? On the other hand, you don't really look at me that much, and it doesn't seem like you're shy."

Does this woman think that all the men in the world are conscious of her?

For a moment, I wondered why she had such a high self-esteem, but people with big boobs like Yamamoto-san bound to be sensitive to the gaze of their surroundings.

Being this pretty, she probably feels people's eyes on her no matter where she's walking in the city.

When I think about it, while Yamamoto-san is talking about her boobs, I'm having thoughts about my little sister even though I haven't even seen her breasts.

I guess it can't be helped that women think that I swing the other way.

"If you're really gonna let me touch Yamamoto-san's boobs, I think I'll try my best on the test."

-If it were the me from before, I might have responded with such vile words.

However, my little sister has taught me that 'if I say something gross to a girl, they will get grossed out.'

I'm not going to do that anymore.

"I don't think it's okay for girls to use the word boobs in the classroom."

...I did it.

I just gave in to the desire to use the word "boobs" in a conversation with a girl.

No, but this is a lot milder.

"Oka-ay, I'll be careful."

Yamamoto-san giggles and chuckles.

Just help me distribute the printouts already.

"You talked too much!"

It was my friend Takanami who shouted in the deserted classroom after school.

He is a member of the track and field club and his hobby is playing eroges.

A virgin geek like me.

"Yeah. Your distance with her was too close, wasn't it?"

Another friend of mine, Suzuhara, quickly raised his glasses and agreed.

A member of the go-home club and a geeky otaku who likes playing eroges.

A virgin like me and has no female experience at all.

The three of us, connected by hobbies, are friends from junior high school.

The three of us have a lot of trouble when making pairs, but Takanami has pretty good communication skills, so we're able to get by as a group somehow.

"I didn't do anything though."

I can't deny that I had a little sense of superiority, but I really haven't done anything.

I knew that it would attract attention, so I tried my best to not talk about it.

This happened because Yamamoto-san was too friendly.

Suzuhara was in a bad mood all day long.

Are you that dissatisfied with me being paired with Yamamoto-san?

"Besides, I can't believe I'm staying late just because you're on day duty. The hell is this? Wasn't Sotomichi only ever interested in 2D? You're grinning at me, you know."

Suzuhara cursed while wrinkling his nose.

There are various things I want to deny about what he said, but I can't argue because my little sister has led me astray from the 2D path.

Right now, I'm waiting for Yamamoto-san to come back from the staff room.

An order came from the teacher, and for a reading session for elementary school students held in the multi-purpose room, Yamamoto-san and I had to do chores such as desk maintenance.

"You don't have to be that angry, do you?"

Takanami chided Suzuhara in a pose with both arms behind his head.

Completely textbook behaviour.

You go to sports club.

"Huh? I thought you said you were going to hit me. Hit me then."

"Oi, oi."

I know that you're jealous of being able to be with Yamamoto-san, but you don't have to be so hostile.

I think that without my little sister though, I'd also be annoyed if Suzuhara were to get along with Yamamoto-san, so I'm gonna just let him go.

"Sorry for the wa-ait."

The culprit came, straddling the sash of the classroom door with great vigor.

Landing on the floor with both feet, her chest bounces.

When I thought that that dazzling smile was now directed at only me, I couldn't hide how happy I felt.

"Well, the multi-purpose room is being setup now. The volunteers will be there in time, so we can go home."

Then, suddenly came the announcement that the day shift had ended.

It's not particularly sad, but it's frustrating to see Suzuhara blatantly flaring his nostrils in joy.

I'm leaving my little sister on dinner duty because I'm going to be home late.

"T-Then, Kana... Yamamoto-san, shall we go home?"

Suzuhara grabs her bag and walks to the door, urging her to go home.

No matter how I thought about it, that wasn't a job for students to do.

That stupid homeroom teacher must have been told a lot of things by the other teachers.

The sadness of not being able to go home alone with Yamamoto-san is something I should take out on my sister when I get home.

"Okay, then the four of us will go home."

Takanami was the first to follow Suzuhara.

He's talented enough to win the prefectural tournament, but his lack of motivation ruins it all.

I don't hate that part of him, though.

"What, are you all going home together? Yay! Let's go, let's go!"

Yamamoto-san skips down the corridor.

Suzuhara tried to say something, but it seemed that he didn't want to offend Yamamoto-san, so he simply clicked her tongue and followed after her.

Today's takeaway is that Yamamoto-san turned out to be a typical circle crusher.

"I'm home."

When I got home, I was tired of dealing with Suzuhara, who wanted to be intimate with Yamamoto-san the entire time, causing me to stare blankly at the shoes left at the entrance.

This scenery seems to be different from usual, but I'm not sure what it is.

The one thing I can say for sure is that Miyu had come home because the house was unlocked.

I had a cup of tea in the living room for a while, then headed up the stairs to go back to my room.

Afterwards, I heard the door above open, followed by the sound of footsteps approaching.

"I'm back, Miyu. I don't have any plans for today."

I climbed the stairs, praising myself on how well I was able to greet myself home.

"Ah, hello, welcome back. Sorry for bothering you."

The girl in front me was different from Miyu.

Unlike Miyu, this girl who bowed her head down had a really awkward atmosphere.

"Y-y-y-yeah. T-Thank you."

I encountered a mysteriously dangerous girl I didn't know, and I couldn't help but stutter.

Who is this beautiful girl?

Judging from her physique, she should be the same age as Miyu, but her sex appeal is outrageous.

The thickness of her lips and tear troughs were exquisitely defined. It was really shocking to see that there was a person who suited the cliche expression of a living doll so much that it almost changed my worldview.

What's most amazing is that she made me think this way even after spending so much time with Yamamoto-san.

My heart is throbbing and hurting.

This is what love at first sight looks like.

"Um, uh... would you mind if you let me through...?"

The girl was fidgeting, keeping her eyes on the toilet behind me.

"That was rude of me!"

I took a step to the side and followed my eyes on the angel passing by me.

Even such an adorable girl goes to the bathroom.

I'm thinking stupid things.

I should head back to my room quickly.

"Fuuh..."

I was lying in my own bed on my back.

Taking a long breath and calming my mind.

I don't think I'm a lolicon.

The girl was petite and looked like she would look good in a typical lolita style fashion, but that didn't necessarily mean I was attracted to that.

When she bowed her head and greeted me.

Her long hair was casually combed and flowed behind her back, and she maintained a sense of distance, neither looking into my eyes nor looking away.

Those were the things that struck the chords within me.

Pure and lovely.

I even went as far as to call her an angel.

"Should I let one out..."

I didn't even hesitate to lower my pants.

I don't know if it's acceptable for me to masturbate to my little sister's friend.

However, I'm horny.

On the way home too, Yamamoto-san's boobs were always in my line of sight, making me strangely aroused.

Taking off my pants and exposing my private parts.

Having the thought that my little sister and her friend are in the room next to mine, a tremendous sense of immorality strikes me.

I intertwine my fingers with the cock that is swollen, raise my neck, and start stroking.

"Ah... haah..."

The other girl was pure and innocent as far as I could tell.

Even such a beautiful child could pee in a toilet.

As soon as I started thinking about it, the expression of an angel appeared in my mind.

Taking off her underwear.

Exposing what no one else can see.

From there, a lemon colored liquid is released.

After washing with the washlet, she would probably wipe the area with her hands.

I'm not familiar with the sexual awakening of girls, but I wonder if they can feel it even at that age.

She happens to hit a sensitive place while she was wiping, and from there indulged in prostitution and fell into the depths... what if she had experienced that?

"Kuh... fuuh... ahhh..."

My glans are slimy and my masturbating hand can't stop.

It's been a long time since I've been horny from someone other my little sister.

It might actually work out with someone other than Miyu.

I sped up the movement of my hand up and down, feeling something steamy rising from the depths of my testicles.

That moment.

Click.

The door to my room opened.

"Wha-!?"

I immediately covered my lower body with the futon, thinking my little sister's friend had come into the wrong room.

"Onii-chan......"

Miyu, with a displeased face, was the one who intervened my masturbation session.

She closes the door and stands in a commanding posture in front of me, who is unable to hide the situation no matter how I think about it.

As I was looked down upon by those stern, dignified eyes, my lower abdomen swelled up even more, despite the pinch I was currently in.

"W-what happened to knocking before coming in? I told you to be careful!"

"You said you weren't coming home today though."

Miyu lowered her knees in front of the bed.

She had a sour look on her face, but she didn't seem angry.

"My plans were suddenly cancelled. If your friend was coming, I would have stopped by somewhere if you just told me."

"Well, I guess that's true. There were some circumstances that I really didn't want you to know about."

Miyu bowed down apologetically.

I can roughly guess.

"Is that about that girl?"

"Yeah. Her name is Haruka. You met her when she was going to the bathroom, didn't you?"

Meeting her.

Was that such a bad thing?

Did she maybe think that I would fall in love with my little sister's friend?

"Afterwards I felt an evil presence, so I came here."

I'm very sorry that actually turned out to be the case.

"So, there's a reason I came here disrepectfully."

In an oddly frightening way, Miyu looks up at me.

I looked into her eyes first, then moved my gaze to the center of the futon, then met her eyes again.

"Stand up."

Miyu requests, and I obediently obey.

The lower part of my body is bulging, but I'm used to being seen by my little sister.

Except for the added element of having friends the next room over.

Miyu grabbed my waist with both hands and looked up at my cock, which had settled down to a halfway hard state due to tension, dangling in front of her.

"Cum."

Miyu's voice, conveyed in a serious tone, shakes my eardrums, causing my son to raise its head.

My little sister had ordered me to get my sexual desires out in the room right next to where her friend was.

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