I had regained the memories of my previous life and the existence of my cheat skill [Rape].

This was supposed to be the beginning of my unparalleled, overpowered life — or so I wanted to say, but there was a problem.

(I can’t do anything in my current state...)

First of all, I’m still a 12-year-old child.

To be blunt, I haven’t even hit puberty yet.

No matter how hard I try, there’s no way I can rape anyone like this.

Obviously, since I can’t even get it up properly.

If I were an early bloomer, I should be hitting puberty around now, but...

"Sigh..."

An involuntary sigh escaped me.

This was a problem even before thinking about building a harem.

I wanted to start raping people as soon as possible and ease my parents’ worries, but...

—Hmm?

Wait, that sounds really awful when I just read the words...

The cheat skill [Rape] does make me stronger the more I commit rape, so the content itself isn’t wrong, but still...

"Don’t just sit there with that gloomy face, you idiot Rigel!"

"..."

Seeing me depressed, my 15-year-old sister Mesterica shouted at me.

At first glance, she might look like a tsundere character from a Japanese anime, but in reality, she was just a horrible person.

On top of that, she constantly picked fights with me, which made her incredibly annoying.

"...I’m sorry, Sister."

For now, I decided to just apologize.

Dealing with this type of person was pointless if I argued back.

It was best to just brush it off and avoid the hassle.

But she didn’t like that attitude.

"What’s with that tone!? It really pisses me off!"

With that, she grabbed me by the collar.

Because of our height difference, she was practically standing on her tiptoes.

Honestly, it was quite painful.

"Sister, please stop."

"Shut up! This is what you get!"

She swung her fist and punched me straight in the face.

Thud!

A dull, heavy sound rang out.

The pain was unimaginable.

But I endured it.

I couldn’t afford to cause a scene here.

"Hmph! Just thinking that the future of the Gousser Marquis family rests on someone like you makes me sick!"

"Even so, Sister, you have talent."

"Don’t blame it on talent! You’re the incompetent one here, Rigel!"

"...I’m very sorry."

She tells me not to blame it on talent, yet she calls me incompetent.

I couldn’t help but notice the slight double standard.

No — from her perspective, there probably wasn’t any difference in "talent" between us.

Despite having no difference in talent, there was a massive gap in actual ability.

A gap so large that even accounting for our age difference, it was still overwhelming.

In other words, she believed the difference came from effort, not talent.

"Honestly! Why do Father and Mother spoil such an incompetent child like you!?"

God, this woman is so damn annoying!

Should I just punch her once?

—Whoa, calm down, me.

Mesterica specialized in swordsmanship, but even in pure physical ability, she overwhelmingly outclassed me.

On top of that, she could use magic as well.

If I were to convert our abilities into stats, it would look something like this:

Rigel

Swordsmanship: F

Physical Ability: F

Magic: F

Mesterica

Swordsmanship: C

Physical Ability: D

Magic: D

Her stats seemed surprisingly low?

No — for a 15-year-old girl, they were more than sufficient.

You could say she already had the strength of a mid-tier adult adventurer.

On the other hand, my abilities were depressingly low.

There wasn’t a single factor in which I could beat her.

All I could do here was endure.

"...Haa."

I let out another sigh.

Maybe I should just beat the crap out of her right now...?

The stress had built up enough that I was seriously considering it.

"Hey! What’s with that sigh!? How rude!"

"...No, it’s nothing."

In the past, I had completely submitted to Mesterica.

But now that I had my memories from my previous life, I couldn’t help but feel some rebellious spirit.

That was the problem.

"Those rebellious eyes! I really don’t like it! It’s all because of Father and Mother’s poor education!"

Saying that, Mesterica grabbed my collar again.

I wondered what she was planning to do this time.

"This is what you get!!"

The next instant, my body was flying through the air.

She had apparently thrown me.

I flew nearly five meters and landed hard on my back, knocking the breath out of me.

"Now then, it’s time for your education."

Mesterica smiled wickedly.

Her eyes were filled with sadistic pleasure.

This was bad...

If things continued like this, I might really get beaten to a pulp.

I had to do something...!

But even though I thought that, my body wouldn’t listen.

The impact from being slammed into the ground had left my entire body numb.

"Look! Now you can’t move!!"

While saying that, Mesterica straddled me.

And then—

Slap!!

She slapped my cheek with full force.

It wasn’t on the level of simply hurting or not hurting.

The impact was so strong it made my mind go blank.

"Ahaha! Serves you right! Suffer more!"

Mesterica laughed joyfully as she repeatedly slapped my face.

Each strike sent sharp pain shooting through me.

"Guh...!"

I clenched my teeth desperately, trying to endure the pain even a little.

"Oh? I thought you’d cry, but you’re holding up better than I expected?"

Of course I wouldn’t cry.

Why the hell would I have to cry?

"In that case, next I’ll—"

"—Enough already!!!"

I instinctively shouted.

At the same time, I thrust both hands forward to push her body away.

Squish.

A soft, yielding sensation spread across my palms.

(Ah... it’s soft.)

Even though this was hardly the time to be thinking such things, the thought crossed my mind anyway.

It was that incredibly soft and pleasant to the touch.

The true identity of this sensation was—

—

I was being violently beaten by my half-sister, Mesterica.

My cheat skill [Rape] was still unusable since I hadn’t reached puberty yet.

While Mesterica sat on top of me in the mount position, she was one-sidedly punching me.

Even so, when I desperately thrust my hands out to resist, they touched something incredibly soft.

"What the...?"

When I looked, there were two soft bulges right there.

They were as soft as marshmallows, yet had a wonderful elasticity to them.

Their size was probably around a B-cup.

"Hmm... so this is..."

Squeeze, squeeze.

Yeah.

Soft.

The feeling of rubbing them was absolutely fantastic.

"I see... so these are breasts..."

In my previous life, I never had the chance to touch any.

This was the first time in this life that I could finally enjoy them.

If I had already hit puberty, I would definitely have been rock hard by now.

—Hm?

Wait, what is this?

I feel something itchy and restless in my crotch...?

Could I actually be getting an erection?

(No way, that can’t be.)

I tried to convince myself it was impossible, but when I looked down—

My dick was standing tall, pushing up against my pants.

It was completely, painfully erect.

"Whoa..."

Even I was taken aback by this.

Sure, Mesterica’s breasts were attractive, but...

I never thought I’d get turned on by my own sister.

Well, I guess it can’t be helped.

Even in this world, since we’re half-siblings, we don’t share as much blood as full siblings.

Besides, I have memories from my previous life.

Emotionally, she feels more like a distant relative who happens to be a girl around my age.

If I grope such a girl’s soft breasts, of course this would happen.

(Maybe... I can actually reach puberty now...?)

To fulfill the conditions of the cheat skill [Rape], I need to creampie someone.

In other words, I have to ejaculate semen inside a vagina.

The fact that I managed to get an erection from sexual excitement was good news, but it wasn’t enough to say I was fully ready to use the [Rape] skill.

"Wha... wh-wh-wha—!?"

"Hm?"

"What the hell are you doing!? You idiot, Rigel!!"

Mesterica’s face turned bright red as she screamed.

Oh right, I was still groping her breasts.

Even so, the feeling really was incredible.

I don’t think a B-cup is particularly large, but she’s still in her growth phase.

At 15 years old, there’s still a chance they’ll get even bigger in the future.

A chance to grope such a promising older sister’s breasts doesn’t come often, so maybe I should enjoy it a little longer.

"How long are you going to keep touching them!?"

"Gah!!"

I got punched.

And not just any punch — a full fist to the face.

It hurt like hell.

I might even have a nosebleed...

"Ah, Sister... You see, this is..."

"Shut up, shut up, shut uuuup!! I don’t even want to look at your face anymore! —That’s it! I’m going to beat you to a pulp!!!"

Mesterica shifted her position.

She moved from the mount position on my stomach up to my face.

"Mguh!?"

My vision suddenly went completely dark.

No, that’s not quite right.

Mesterica had lowered her hips directly onto my face.

My eyes and mouth were completely buried in her ass.

(Ohhh...!)

The soft, warm sensation of her butt cheeks pressing against my face felt incredibly good.

They were slightly sweaty and moist, but that only made it even better.

It was a scent I had rarely smelled before, but far from being unpleasant, it was strangely addictive.

(Amazing... So this is the ass of a 15-year-old beautiful girl...)

I felt like I might cry from the sheer emotion.

I never imagined I’d get to experience something this wonderful.

If possible, I wanted to keep my face buried here forever.

"Dieeeee!!!"

But that blissful moment didn’t last long.

Along with Mesterica’s sudden scream, a powerful impact slammed into my abdomen.

Dogooh!!

A dull thud rang out as I took massive damage.

"Guhaaa!"

It felt like my internal organs were being crushed.

My ribs might even be broken.

But I refused to lose consciousness.

It would be far too regrettable to pass out in front of such a magnificent ass.

"Hmph! Serves you right!"

Mesterica spat out the words.

"Someone as incompetent as you doesn’t even come close to my level! Have you learned your lesson now?"

"..."

I couldn’t argue back.

Because it was the truth.

There was no denying that I was much weaker than her.

But right now, none of that mattered.

(I want more... I want to savor this more...)

That single desire dominated my mind.

I wanted to enjoy it just a little longer, but it didn’t seem like she was going to let me.

"—Hmm? What is this? This bulge here."

Saying that, Mesterica reached down and stroked my lower abdomen.

This was bad.

Even though we’re only half-siblings, if she realized I was getting turned on by her, it would turn into a full family crisis.

I had to find some way to cover it up...!

Right as I thought that—

"Were you hiding a dagger or something? How cocky for an incompetent like you! Well, a pathetic little dagger like this won’t work on me anyway!!"

"Eh!? Aaaahhh!!"

A sudden stimulation shot through my dick.

It seemed Mesterica had lightly slapped the bulge in my pants.

And then—

Spurt!

Something exploded inside my pants.

"Well, whatever. It’s important to be resourceful even if you’re incompetent. If you feel frustrated about what happened today, then keep working hard from now on!"

Mesterica said as she stood up.

I could only stare blankly at her retreating figure.

And so, the first ejaculation of the Marquis family’s heir — who also possessed the cheat skill [Rape] — was taken by his half-sister.