My ability awakens, my younger step-sister feels the urge to breed when I try it on her

My name is Itou Keigo, just an ordinary second-year high-school senior. (TN: 16/17 years old)

My face, looks, height, weight, test results, reflexes, everything about me is ordinary.

Because I am not very social I have few friends, and everyone in my class will forget about me shortly after graduation. 「Such a guy… aa, was there someone like that」they will say.

Girlfriend? Such a thing is non-existent to me. So naturally, I'm still a virgin.

To think a person like me was handed this kind of『Ability』.

『The ability to manipulate women, create an immense urge to breed, and freely have sex with them』

I don't know how or why this power appeared.

One Sunday morning, I woke up and found the knowledge of this ability in my consciousness.

I didn't doubt its existence. Instinctively I already knew how to use it, it cannot be helped that I want to use it. Probably it is like such a thing from a manga where the ability which was slumbering deep in the soul was awakened or something like that.

Anyway, I have a morning wood penis that was so tense I could barely endure it. My underwear was bulging giving it a painful stretching.

I am also kind of feeling a little dizzy in my head.

（A re? I'm feeling kind of weird? Like I have too much feeling of arousal and lust that is running rampage...）

However, thoughts of reason were blown away when pain entered my body and the penis was visibly pulsating. But it would also be unsatisfying if it was over too soon.

（Whatever. It's not like I need to calm it down）

I don't need to worry. I can just push down any woman I choose.

Because that is the power I have now.

I left my room and headed for the living room.

In this house, there are preys of "three animals". One or two such "little animal" should still be inside somewhere.

「Ah, niisan. Good morning」

As expected, one appeared. It's my little sister Mayuha.

Even if I say little sister, it is only by a sense of duty. One year ago my father remarried, so she is really my younger step-sister.

Mayuha is a very beautiful girl.

Her age is 13 years old and is just a junior high school student. She has big pretty eyes on her face. White skin, contrasted with long black hair. A small head, slender hands and feet, and a long slim and delicate body.

She is obedient and docile, a sweet, ideal picture of a younger sister.

Up till now, many times, she has been scouted for work in the entertainment industry (TN: I'm guessing some kind of idol work), But she has a fragile body and she herself is not very interested. That is why these things were turned down by our parents every time.

In the span of only one year, her height has grown, and her body has for the first time become soft like a woman. Amongst other things, my line of sight was frequently snatched away towards her two breasts.

「Niisan. Somehow, aren't you looking a little strang... e? 」

『Ability』is not difficult to use.

First of all, make total eye contact, then, simultaneously pour power into it.

「Ah, n-no, w-wh? …..haht~ hah~! ?」

That's it, and any woman simply wants to breed.

Mayuha was hugging herself, and in this way, her small body shivered.

「I'm, something weird is...n-no, s-stoh~ p」

She was chewing her lips with desperation, however, resistance to this feeling of wanting to become pregnant is impossible. Because my 『Ability』 reach into the very soul itself, naturally her whole body is aching with desire.

「Fu...ha~a, wha~ a」

Her face reddened before my very eyes. Someone not yet finished with her childhood was bearing such strong emotions in her cute face, it was terribly erotic.

Mayuha's desire for me, right now, should be unbearable. Dazed and confused, right now her body and her heart are longing to have sex with me.

「Mayuha」

「Ah, nn u~ hah~」

Holding her face with both of my hands, I kiss her.

There was no resistance.

「N~tsu, ani-sa...nn! ?」

It was my first real kiss, an ordinary kiss where one simply attach their lips together.

But with just that, "Doki-Doki", my heart is pounding.

（So, this is a kiss? ）

To merely touch and feel the lips, I experienced a special connection.

I embraced her close to me and was surprised at how thin she felt in my arms. Not only thin but also soft, it felt like she was very fragile. That this little girl was this way, it deeply moved me emotionally.

「N~tsu, un ~tsu」

While listening to my lovely little sister's audible nose breathing, I shifted my arm around to the back of her body. I caress her delicate back, and gently brush against her as my palm lowered further, to her waist, and cupped her butt.

「Fuu~tsu, n ~n! 」

Though it is thin I feel a certain softness when I gently massage it, Mayuha's slender body "Biku-Biku" trembles a little as her sweet breath leaks out.

「Yah~ ani-sa...ha, hot」

It seems like she loses the strength in her legs and almost falls to the floor.

She grasps my clothes tightly and relies on it not to follow along with her legs' wish, the sight of her is really adorable.

Because of her circumstances, I hug her close and while supporting her with both of my arms, make her sit on the sofa.

「Mayuha... is very pretty」

「Ha~u, niisan...A, aa~a~tsu」

I raise my gaze to watch her long eyelashes that decorates her eyes, she blushes when I make eye contact in order to pile up the 『Ability』 that I will send her.

「A, an AAaa」

My sister can not break eye contact. Because I do not allow it through the use of my ability.

She doesn't know what to do. Tears "poroporo" fell in her confusion, her big eyes found mine and we stared at each other.

「Hah~...niisan, I feel weird... my body is hot, and something strange...hah~ 」

Such an expression, to be stared at like this by such a beautiful girl. With this, there should exist no man whose head does not boil.

「Please...Make it stop. ...Please help me. Would you be kind...hah~, aa! ?」

My arms that were now free extended towards her breasts. She was dressed in a sweatshirt, but I could feel her small breasts through it when I palmed my hands on top.

「Ah, don't... st- stohfu~」

Although it is over the clothing, I can feel a certain softness. Rather than a massage where you press from above, I'm caressing gently. A pleasant feeling is transmitted to my hands.

The emotion from touching a girl's breasts for the first time, it's a happiness where my head gets dizzy.

「Fu~u, a,ani-sa...aa」

Her voice, her expression, everything is so erotic.

It becomes unbearable so I roll up her sweater, and her white skin and her white bra appear before my eyes. The volume of her breasts covered with underwear was nonexistent, but even so, very much alluring.

「Mayuha's skin, it's very beautiful」

「Ah, aah...it's embarrassing」

I slide her bra out of the way. The still growing, faintly swelling mounds on her chest, has tiny reddish nipples.

It has been only a year since we became brother and sister, but Mayuha loves me as her elder brother. Truly an ideal younger sister. As gently as I can while desperately controlling myself, I work with my hands.

「Fu~u uu...hah」

I gently massage her tiny breast on the palm of my hand with just four fingers and enjoy the softness. Before I knew it, my face draws nearer, and I began to lick and suck on her nipple.

「Haah~ mn!」

It's clear that the nipples become hard underneath my fingers.

She desperately tries to stifle her voice, but even though she holds back my loving sister leaks it out in an erotic manner.

As I stimulate her breasts with my hand and my tongue, my other hand stroke her lower thigh while pushing the skirt up.

「Ah~ niisan, that's... nnku !」

Oh, on the inner side of her thigh was a sweaty and moist feeling. Where my fingers reached, a soaking wet fabric was felt.

（That, to be this wet…）

It's because of the lewd juices that ooze out of her.

My head becomes dizzy, caught in the realization that my 『Ability』 and loving caress made Mayuha respond like this. Because that impulse from my ability is too strong, I need to be more careful when using it. I tickled with my finger on top of her underwear.

「No~ donnnnn….t~tsu」

Her body contracts, shrinking into herself, the delicate body trembles "Buru-Buru" as she stiffens. My fingers that were in between her legs were squeezed tightly by her butt and thighs.

After a short interval of time, 「Hah~ a...」her voice leaks out a long sigh, and she lost all strength.

（I did it. I made Mayuha cum）

It was an amazing feeling of satisfaction. I mean, by conquering this child it filled my heart with a drunken sense of accomplishment.

But, this is only the beginning.

Mayuha's pretty face remains strongly childish, but her appearance and facial expression are so erotic as her strength is drained away. While I look at this form of my younger sister, I gulp down the saliva in my mouth which appeared during my excitement.

（Well then. It's finally time）

In front of the lovely Mayuha who was drained of all her strength, my penis is erect to the extreme and it has been hurting since a while ago. There was no other choice.

Pants and underwear, all at once, I take them off and the thing between my legs at my crotch is set free.

On the couch, Mayuha entrusts her exhausted body to me, and I tuck both hands up inside her skirt to remove her wet underwear.

「Your waist, can you lift it?」

「Aah, ah...kuh, e...even though I don't want to」

Too strongly in heat, Mayuha can only shed tears to the unpleasant request but also she doesn't seem to be able to disobey. As I asked of her, she raised her waist by a little to assist me in taking off her underwear.

「Uwa~, awesom~e」

At the base of the two long slender legs, I saw a woman's private place. A vagina decorated in thin pubic hairs.

Naturally, I have seen it on the internet in pictures and movies so many times I can't count. However, the real thing looked completely different.

Very lovable and beautiful and erotic.

It must be because Mayuha is such a beautiful and cute girl that I feel this way. Of course, this is not an adult's genitals.

「Niisan...it's embarrassing」

My sister hides behind her hands but even so remains docile.

I immediately consider stroking the slit with my finger and licking it with my tongue, but my penis is aching so much that it quickly stops me.

（At this point, it should be fine right?）

Mayuha's legs were spread open, I used one hand to bring my penis in the correct position.

In the beginning, my alignment was bad and although I did not enter, I felt the tip hit her entrance when I adjusted my back.

（Like this, surely it should enter inside Mayuha）

I confidently sunk my waist down instinctively, an unbelievably good sensation was felt as the glans was tucked nicely inside her.

「Ha~h, Ha~h, niisan...Ow~ow, n~uu~!」

Is that the hymen? Something seems to be resistant like there was something in the middle, but I could not afford to stop and relish in it.

"Zururi", my penis was engulfed in warmth.

The penis was sensitive to this tight, intensely warm and soft, incredibly comforting and pleasant place that it was inside.

「Uu~u...Mayuha!」

「Niisan, nn~ku...ni, sa~n」

My first experience to the insides of a girl, it was an unexpectedly good feeling.

Completely different from what I had imagined. Or, no, as I had thought, it felt good. But experiencing it for real, it felt even better than my imagination.

「Uh~ an aa~...」

「Hiiu~...!?」

"splurt, splurt", Oops, I just casually ejaculated.

Too much stimulation, I guess. However, rubbing inside her just three times is too little.

「Ah, ah, ah...amazi~ng」

While my penis is pulsating, semen runs through the urethra and is released into the body of my younger sister.

For the first time in my life, I ejaculated from having sex. Masturbation can't even compare. Orgasming inside a warm body is much more satisfying than using my hands.

「Ah, aah~…..by some chance, inside me?」

While listening to the voice of a dazed Mayuha mumbling, my pleasant orgasm comes to an end.

（Still, this is not over）

Now that it has released semen, my penis was starting to lose strength, but, still, the unbearable ache remained.

I bury my face in Mayuha's neck, where there was somehow a pleasant scent. While doing that, I start to slowly move my hips.

「Ah, ah~…..niisan」

Inside the body of my sister, "hikuhiku", small vibrations stimulated my penis. With just that, I regained the stiffness from a short time ago.

「Eh? Niisa...ha~ u~」

A breath as a result of her lower back becoming pushed up, my sister screamed out.

「Not yet, I'm not satisfied yet」

「But that's, Ah~ ku~」

Without a doubt, Mayuha is a virgin so surely she would be in pain, right? Eyes tightly shut, face distorted while sweat is dripping from her forehead.

She is cute and in pain, so, although I am sorry – to see my sister like this, I get more aroused and can't help it.

（No, perhaps. Somehow, aren't I acting recklessly?）

Such a reason appeared from the corner of my mind, however, it is no match to Mayuha's appeal.

I want to devour her. I want to devour all of this girl.

「I'm moving, it's fine right?」

「Nh, gu~u !?」

My hips went in and out and in doing so, it felt like my meat stick melted from the pleasure. The penis experienced such a good feeling, my waist felt like it grew weaker.

「Uu~hu, ah, ah~, niisan, ouch! Ah~ it hurts...ah ah, niisan...niisan~」

Parting her lips while clenching her teeth, Mayuha tries to stifle her screams but they leak out anyway in her breaths. More and more, it stimulates my lust for conquest.

「Inside Mayuha, so good. It's the best.」

「Fu~ah, hurts...niisan, it hurts ah~」

Niisan, niisan – how many times has she called out to me? Mayuha is truly lovable.

The more I feel this love, the more it increases my excitement. It makes my penis ache with pleasure and I feel good. To a sister who is in pain, I am sorry but my pleasure is too great, it's amazing.

Whenever my hips move back and forth, soft flesh tightly coils around me. Is it because she is in pain that she is this tight perhaps? Even so, it feels so good I can't resist.

My poor little sister, it's only me who is comfortable.

（However, any time now it should change）

The sperm that was shot inside her a while ago, it is supposed to contain the effects of my 『Ability』.

「Ua~, hah~ hah~...ah,aah, ahhh~?」

It appears like just painful heavy breathing, but I can tell a difference was mixed in. For sure, a wet, sweet sound of breathing was starting to appear.

「Ah~, aa~...it hurts, but. Strange...something strange is~」

The 『Ability』 I possess is to force a woman to have sex with me.

The semen which was poured into her womb has fragments of that ability included. From inside the womb of Mayuha, it infiltrates her, and my wishes start to affect her.

The only thing I wished for her was to be in heat, and deep inside her body from within the soul, a fire is lit. It is easy to influence her like that and give her merciless pleasure.

「Ha, ahn~」

When I rubbed inside her vagina with one big movement of my hips, she screamed out, not being able to endure it.

「It feels amazing...Mayuha, do you feel it too?」

「A~u, nn, I feel strange...feelings. I can't say...Hahh~ ha~」

The feeling of my penis wrapped up in soft flesh changed.

So far it had merely been tight, but now it was squeezing hard. Before I knew it, it became more difficult to move. A swelling-like sense was wrapped around my penis and it felt like I would cum.

「Huu~, hurts...even though it hurts, something strange... ah~ n n. Niisan, niisan, save me.」

I have no doubt. Mayuha is panting from the pleasure.

Whenever I move my hips back and forth, a pleasure is born from my penis that runs along the muscles at my spine, while at the same time this girl sobs in a sweet voice.

My body and my heart are both feeling great.

「Kuh, Mayuha...Mayuha~h」

「Ah, a~ niisan, na, ha~, ouch...ah, ahhhhh~」

Even though I already came once, I'm not going to last much longer. From inside my nether region, I feel the semen is building up.

But even so, I want to savor these pleasant feelings a little more, so while strongly biting my back teeth I put effort into enduring it and keep shaking my hips.

「Niisan...niisan, aa~,...n~ ah, ahh~」

From the location where the two of us are connected, I could hear the filthy sound of water. Mayuha's groin increasingly got wetter, and I wondered whether or not the sofa would be drenched too.

Mayuha's flirtatious voice spilling out, the sofa squeaking, the "guchagucha" and other various sounds blended together as they entered my ears. (TN: gucha is a sound like "splat")

Unexpectedly I felt a touch on my arm, the feeling was confirmed to be my little sister's hand that was extended to grasp my shirt tightly.

「Ah, Ahh~ so unbecoming...it came out. I, even though it hurts...Hyimnn~」

「Mayuha...ku~uu!」

While closely gluing my body to hers like a mantle, a second ejaculation escapes into my sister.

「Hah~, Aa~, aa~」

While her intensely wet sigh reverberates, Mayuha's body again loses all strength.

Even so, her arms stretched out to surround my back, and she weakly embraced me close.

「Hah~ hah~...Mayuha」

It was very pleasant.

Bodyheat circulated between us as we were piled on top of each other. My sensitive penis is left inside her where I feel a soft, wet heat. It would appear that she embraces me both on the outside and the inside of her body.

「Ah~ hah~...」

Dazed with exhaustion is her expression, and from her, the loose mouth drips saliva. I will kiss her again in order to lick it up.

「Mmm~...nu~」

Is she not conscious of what is happening? Even so, Mayuha responds to my kiss. When I try to break open her lips with my tongue in order to go inside, she hesitantly offered me her own tongue.

「Nh~ nuu~ fuu~」

A kiss that is much deeper than the one before, a French Kiss. It's not only the lips but also the tongue that I use to make love with her mouth in any manner I like. (TN: not sure if correct)

「Uhn, niisan...nh」

When I send saliva, she obediently swallows it. I am so happy to kiss her this deeply, her frail lips so openly accept it.

I was having more and more fun the longer we continued to kiss, when…

" Gatat! " (TN: sfx like shoving a chair to stand up: "clatter" )

The sound was heard.

「Wh...What on earth are you doing! ?」

Knowing from the voice who it was, I raise my head.

As I thought, it was another one of my step-sisters, the elder sister, Yuuki. She stood there with a pale face.