Be gentle when your naughty little brother fucks my ass.

(I)

I have an older sister, and I love her very much because she is always very kind to me, takes good care of me, and is willing to take me everywhere to play.

My sister is about two years older than me. When we were little, we always bathed together without any hesitation. Our parents weren't worried because we were young, but this led to many things happening between us later.

When I was little, I hadn't yet developed any sexual awareness. My sister and I slept together, and since we had always bathed together, I wasn't very interested in her body, and she didn't seem to care much either. But I always remember how comfortable it felt when my sister washed my penis with her hand, so I liked it when she washed it there. However, whenever I wanted to wash my sister's body, she would always laugh and say that I wasn't clean enough, and that I should soak in the water first before she washed herself.

Strangely enough, this only happened when we were bathing; nothing happened when we slept in the same room at night.

Anyway, we just bathed together like that until I was in fourth grade and my sister was in sixth grade. Back then, the manga "City Hunter" was all the rage. My sister and I both loved reading it and laughed out loud. However, I didn't understand the dirty jokes, especially why the protagonist Ryo's penis would grow longer and bigger. Since I couldn't get an erection at the time, I could only look at it without understanding. Later, one night

when

I couldn't sleep, I remembered the pleasure of my sister rubbing my penis while I showered. So, I started rubbing it randomly under the covers. Suddenly, I found it even more pleasurable and started to feel something was wrong with my penis. That's when I realized that if you keep touching it until you get an erection…

While showering, I took off my clothes and called out to my sister to get her attention, because I thought I could be like the protagonist, and she would be very happy. After my sister took off all her clothes, she asked me what I wanted to do. I told her to sit on the small wooden chair first, then stood in front of her and said, "Sister, look, I can be just like the guy in the manga 'City Hunter'..."

Then I started rubbing my penis with my hand, feeling a slight pleasure, and my penis began to get engorged and grow larger.

My sister watched with wide eyes, becoming more and more surprised as my penis grew bigger and erect.

I said to my sister, "Look, my little penis has gotten so big, just like in 'City Hunter'..."

My sister just kept looking at me without replying. Occasionally, she would stare at my face, and sometimes she would look down at my erect penis. After about a minute, I naively asked her, "Sister, do you want to touch it?"

My sister was startled by my question and looked up at me before saying, "You can't do that."

At that time, I didn't understand that such behavior was forbidden. I just thought my sister's reaction was strange and a little disappointed because she didn't express the joy and admiration I had expected for my erection, just like Ah Liao's...

Unable to hide my disappointment, I said to my sister again, "Touch it, it's very hard!"

My sister looked up at me, and then at my penis. I told her again that it was okay to touch it. After about half a minute of silence, my sister finally reached out and gently grasped it.

My sister didn't grasp it very hard; she just touched it very carefully and gently, occasionally pressing down to check. I was just standing there letting my sister touch me, enjoying the feeling of her holding my penis.

Actually, my sister was probably more curious than I was; I could tell from her eyes and actions. But perhaps because she already knew a little about these things, she felt guilty and didn't dare to do anything reckless that night.

That night, that was all. My sister touched me once and then let go. I wanted her to praise me, but she didn't say anything, so I didn't dare to speak either. I thought I had done something wrong and quietly took a shower. My penis slowly went back to its original position.

I remember those few nights we didn't talk much while showering. Because I was afraid of upsetting my sister, I didn't dare to show off to her anymore, just quietly showered.

After a while, I remember one night when I was showering with my sister, I was standing, and my sister was squatting in front of me, scrubbing my feet. Then, she silently reached out and touched my penis, and started scrubbing it.

My sister used to do this for me before, so I didn't find it too strange. But this night was different. My sister seemed very nervous that night, not saying much, just staring at my penis and rubbing it, unlike before when she would just wash it.

I found it strange, and because of her rubbing, I felt pleasure, and my penis started to get bigger and erect, but she kept rubbing until it was at its maximum size.

I kept looking down at my sister, and when she noticed me staring, she looked up at me, her expression a little nervous.

My sister said nervously, "Let me help you wash it a little cleaner..."

I just nodded, and then she pretended to be washing me, continuing to rub my penis and observe it. But at that time, I didn't realize that my sister had become interested in my penis, so I foolishly let her play with it until she seemed finally satisfied and then started coaxing me not to tell anyone.

At the time, I really didn't understand, so I asked her why. My sister nervously gave some nonsensical explanations, but I still didn't understand. In the end, I could only promise her not to tell anyone, and only then did my sister finally relax...

Every night when my sister showered, she would help me wash my penis, and I was happy to let her massage it until it was erect. It was truly a case of one willing to give and the other willing to receive.

At first, she was a little embarrassed, but after a while, we were chatting and laughing, and everything seemed so natural. My sister would even ask me how it felt, but I didn't know that feeling was pleasure, so I just told her it was quite comfortable. I would even proactively put my penis in front of my sister at the very beginning of the shower, letting her hold it until it was erect before I started washing.

Then, one afternoon when I was home alone after half a day of classes, because my sister had gone out with her classmates, I was bored and went to look through my dad's videotapes to see if there were any cartoons, but I unexpectedly found a roll of porn.

I stared at the contents with astonishment, and this pornographic film awakened my sexual awareness...

Although I didn't know the meaning of sex at that time, I already knew the difference between male and female genitalia, that penetration was possible, and that it looked pleasurable. So that night while showering, I started studying my sister's body...

From that day on, I always paid attention to my sister's vulva, always wanting to see it clearly, but I was afraid of upsetting her, so I didn't dare to do anything rash.

However, I soon noticed that my sister always washed her hair at the sink, so she had to stand in front of the sink and bend over, which would stick her buttocks out. Plus, she would wash for more than ten minutes each time. Knowing this was my chance, I realized that the night after I discovered this opportunity, my sister helped me wash again and rushed into the tub. I waited for her to start washing her hair, then secretly stood up from the bathtub and carefully walked behind my sister's buttocks and squatted down.

At first, I could only see my sister's buttocks, nothing else. Then, it seemed she wasn't bending down low enough while washing her hair, so she spread her legs wider and moved her body downwards. Only then could I vaguely see her genitals, which looked similar to those in adult films.

I secretly kept holding my penis while watching my sister's genitals, finding it very novel. A few minutes later, my sister suddenly turned off the tap, having finished washing her hair. I quickly returned to the tub, trying to pretend nothing had happened. But I was a little too slow. I had barely stepped into the tub when my sister, drying her hair with a towel, turned around and asked why I was standing up.

My sister hadn't noticed that I had just peeked at her private parts, but I was still a little guilty, so I stammered that I was finished washing and quickly got out of the tub, dressed, and left.

That night, all I could think about was my sister's genitals. Before going to sleep, lying under the covers, I couldn't help but grab my penis and make it hard. I kept thinking how strange I was, why was I so obsessed with my sister's genitals?

For a while, I would sneak peeks at her genitals while she was washing her hair at night, and luckily, she never found out, so I gradually became addicted.

Then one afternoon during a half-day of school, I watched a pornographic videotape that my dad had hidden when my sister wasn't home. It was a different tape, and it excited me just the same.

Of course, I watched it while holding my penis, but when the pornographic content moved from the bedroom to the bathroom, and the male protagonist and the actress were playing a water fight in the bathroom, and finally the male protagonist pressed the actress's upper body down and penetrated her anus from behind, it suddenly gave me a shock... and this changed my relationship with my sister.

Before, I only ever peeked at my sister washing her hair. But this video made me, in my naivety at the time, realize that such a thing was possible. If I could penetrate her from behind while she was bending over to wash her hair, like in the porn...

Honestly, who would think a fourth-grade elementary school student would have such a plan? Especially my sister. Although she would curiously play with my penis when we showered, our sexual relationship was nothing more than that. She definitely wouldn't be too wary.

Anyway, I was very nervous after watching the porn that day, and I was even more restless when my sister came home. Because I really wanted to try it out, to see what would happen if I inserted my erect penis into my sister's anus, but I was afraid she would be angry. So I kept telling myself, "Let's see how it goes first, and the actors in the video all looked so comfortable, my sister probably won't be angry..."

But although my sister didn't understand what I was worried about, and since I'm not good at hiding my feelings, she asked me what was bothering me. But I could only answer that nothing was wrong.

That last shower, I still didn't dare do anything, afraid of upsetting my sister and worrying about my parents finding out. So, I only dared to peek at her as she bent over to wash her hair, and after the shower, when it was time for bed, I hid under the covers, grabbing my penis and regretting it, thinking I should have tried…

In short, that period was really tough; I was constantly hesitating about whether or not to have sex with my sister.

Just when I was worrying about these factors, the opportunity unexpectedly came. Suddenly, my parents told my sister and me that they wouldn't be home that night because they had to go to relatives' house in the south and wouldn't be back until the next evening. They asked my sister to take good care of me…

Finally, it was time to shower again. I was half nervous and half excited, because knowing my parents wouldn't be home that day felt like they had finally made a decision for me. If I had sex with my sister and she got really angry, I could just apologize, since there was no one else at home.

My sister and I went into the bathroom again, took off our clothes, and my sister started rubbing my penis hard again, watching its changes intently. I knew my sister still thought I was naive and completely clueless about such things, so she kept using the excuse of taking a bath to examine my penis. But by then, I already knew that a man's penis could be inserted into a woman's anus, and I had decided to try it out.

My sister finally got used to playing with my penis, rinsed the soap off my body, and then told me to soak in the bathtub. After she washed her hair and body, she would come in and play in the water with me.

I started to feel heavy breathing, mostly because of nervousness, so I stayed in the warm water, watching my sister's actions.

My sister also leaned over the sink, rested her head on it, and started rinsing with the showerhead, applying shampoo, and soon her entire head was covered in fragrant bubbles.

Seeing that my sister's head was covered in bubbles, I knew she couldn't lift her head or move, so I nervously climbed out of the water, silently walked behind my sister's buttocks, and immediately moved my erect penis towards her buttocks.

Because my sister and I were about the same height at the time, and I already knew the location of her vagina, I quickly positioned my penis where her vagina would be.

Suddenly, my sister made a "Hmm?" sound, clearly reacting to my penis touching her genitals. She stopped washing her hair and immediately raised her body slightly, turning to look at me, our eyes meeting.

Nervously, I quickly pushed my penis towards her buttocks, placing my hands on her waist, trying to insert it into her anus, but it felt like I was hitting the bone, unable to penetrate.

"Ah! What are you doing, little brother?!"

my sister cried out in alarm. She must have realized I was trying to penetrate her, and since I hadn't succeeded, I quickly said, "Sis… I just wanted to try…"

My sister just stared at me with wide, astonished eyes, as if struck by lightning, unable to believe that I, a fourth-grader, would suddenly do something like this to her private parts.

I nervously shifted my penis to adjust its position, and my sister, who had just come to her senses, started yelling again, "You can't do this! Get off!"

I thrust hard again, and suddenly felt a sharp pain in my penis, like a layer of skin being ripped off. My sister screamed shrilly at that moment, "Ah!!"

The glans really hurt because the foreskin suddenly retracted the moment I inserted it; otherwise, it would have been covering the glans. I just didn't realize it then, so after feeling the pain, I dared not insert it any further.

My sister screamed the moment I inserted it, and then, with soap bubbles all over her hair, she stared at me in astonishment, her expression of terror one I will never forget.

I looked down and only saw about the part of my penis that was inserted. Thinking that it hurt this much, I wondered what it would be like if it were all the way in—wouldn't it be excruciating? So at that moment, I didn't feel any pleasure, only pain. Seeing my sister's expression after her scream, I became scared too.

"Sister... does it hurt too?" I asked my sister fearfully.

Tears streamed down her face, and she said in surprise and horror, "How could you do this..."

It was the first time I'd seen my sister cry because of me, so I quickly pulled my penis out, feeling a sharp pain. My sister groaned softly.

It was the first time I'd seen my own penis; it was completely red. But my sister's tears terrified me even more. Knowing I'd pulled away from her, she started sobbing on the sink, wailing and crying.

That night, seeing her cry like that, I knew I'd done something terribly wrong, so I knelt beside her, apologizing profusely. But after crying for a while, my sister washed her hair, sat on the floor, and without regard for me, spread her legs to examine her genitals, even taking out a small mirror to look at herself.

I couldn't help but look too, seeing her completely open vulva, the opening slightly wider, probably from my penetration, and even seeing some blood trickling out.

My sister cried and yelled at me, "How could you do this! How am I supposed to get married?!"

Of course, I didn't understand at all, and I didn't even know that inserting my penis into my sister's buttocks was sexual intercourse and could result in pregnancy, so I could only kneel down in fear and apologize to my sister...

(II)

At that time, my sister was in fifth grade and I was in third grade. My sister was a more mature and composed girl than her peers, and she was especially good at taking care of me, so she was particularly shocked by what I had done to her.

That night, my sister cried and kept yelling at me, asking if I knew what I had done to her.

When I went to bed that night, my sister was still lying in her bed, crying quietly, so I hardly slept all night. I was late for school the next day because of this, and my sister didn't call me; I went to school by myself.

I still don't understand why simply touching my sister's butt caused her this reaction, and I felt intense regret, constantly apologizing. Even after arriving at school, I kept running to her classroom to apologize, but she didn't say a word and even sent me back.

I thought that when my parents came home that evening, my sister would tell them what I had done; but she didn't. She was just sullen all day, at least she wasn't crying anymore.

After my parents came home, they went to take a shower first, while my sister and I stayed in our room doing our schoolwork without saying a word. When they came out of the shower, my mother wanted my sister and me to shower together, saying the water was still hot, which made me start to worry and secretly watch my sister.

But my sister just calmly agreed, went to the closet to get her change of clothes, and walked into the bathroom without saying a word.

Usually, my sister would ask me to shower with her, but she didn't today, so I thought it must be because she disliked me, so I could only obediently continue doing my homework.

A few minutes later, I felt a tap on my shoulder. I turned around and saw my sister, expressionless, saying, "Didn't Mom and Dad tell us to go take a shower? What are you still doing? They'll scold you if the water gets cold."

At that moment, I really didn't know what to say to my sister. I could only apologize again and quickly go to the closet to get my clothes. Since my sister usually got them for me, I couldn't find my clothes anywhere.

My sister came over, silently started rummaging through my clothes, and placed them in my hands before leading me to the bathroom…

Once inside, I felt like my sister had forgiven me, and I even naively thought that things would return to normal in a few days, which made me feel much more relaxed. So I started taking off my clothes, but my sister spoke first, saying, "Do you know what you did to your sister last night?"

I stopped taking off my clothes and quickly shook my head.

"If you don't know, then why did you do that to your sister?"

When my sister asked me this, and saw her serious expression, I became scared again and didn't know what to say. Unexpectedly, my sister knew what I was thinking and said, "It's okay to tell your sister, she won't scold you."

So I could only carefully answer her, "Because... I watched the videotape in Dad's room, and they seemed to be having fun doing this in the videotape, so I thought if I did this, my sister would like it too..."

After saying that, I apologized to my sister, and she just looked slightly surprised after learning the truth.

I apologized to my sister again, saying that I really didn't know my sister would do this, and finally my sister started to help me take off my clothes without saying anything. Because my sister sometimes helped me take off my clothes when I took a bath, I obediently cooperated with my sister.

I moved my arms and legs with my sister's movements and raised my legs so that my sister could take off my pants.

Just when I was finally down to my underwear, my sister looked at me and said to me, "My sister will never be able to get married. You have taken my virginity, do you know that?"

I looked at my sister in shock, but my sister said this to me very seriously, and I didn't know how to respond at all.

Because I had watched a lot of prime-time dramas with my sister at the time, even though I didn't know what sex was, I still knew that chastity was very important for a girl, and even thought that girls without chastity were bad girls, so I became worried again. Plus, my sister was still very naive at the time, or perhaps she had watched too many dramas like me, and thought that without chastity, she would never be able to get married…

I started apologizing to my sister again, saying that I didn't mean to hurt her. My sister seemed to have come to terms with it, and just asked me to take off my underwear and start showering.

I started washing my body, and after my sister took off her clothes, she took the soap from my hand and helped me wash my body, but kept avoiding washing my penis.

My sister suddenly asked me, "Do you like me?"

I kept nodding.

"Since you caused me to lose my chastity yesterday, are you willing to take care of me from now on?"

My sister really naively believed that she would never get married, so she used the idea of me taking responsibility to replace the idea of marriage.

I was young then and didn't understand what my sister meant. Plus, my sense of guilt about incest was weak. I only knew that siblings couldn't marry, but I didn't know that marriage meant taking care of my sister, or even more. So when my sister asked me if I was willing to take responsibility, I agreed. After all, I thought it wasn't marriage, just taking care of my sister shouldn't be a problem, right? After hearing my agreement, my sister

, a pretty, college-educated, green tea bitch who was a 6,000 yuan overnight hookup

, finally smiled happily and hugged me, saying, "When you grow up, you have to protect your sister!"

I was very happy to be hugged because I really felt that my sister had forgiven me. At that time, I just wanted to grow up quickly so that if anyone said my sister was unchaste, I could protect her.

When my sister let go of me, she warned me, "You can't tell Mom and Dad what happened, because they'll definitely beat us."

Hearing that we'd be beaten, I nodded quickly, because I was still terrified of Mom's stick and Dad's slaps, and I never intended to tell anyone anyway…

Then, nothing happened during the bath that night. We resumed our happy bathing atmosphere. After my sister helped me clean up, she made me wash my penis while she washed herself. Then we started splashing each other with water until Mom called us from the doorway.

That night, we went to bed together again, talking about everything, just like my sister. We lived a peaceful life for a while longer. Although I was still curious about why I had penetrated my sister's butt, I didn't dare ask her, so I kept it buried in my heart.

But before, my sister would masturbate while bathing me every night, so I was satisfied. But after that day, my sister stopped washing my penis, and I didn't dare touch it myself anymore. I could only obediently endure it until finally, when I couldn't take it anymore, I asked my sister while showering, wanting to touch it but worried about doing something wrong, "Sister... can I touch my penis?"

My sister was stunned by my question, just looked at me, and then smiled and said yes.

So I quickly stood in front of my sister and started rubbing it with my hand, feeling the satisfaction of pleasure. As my erection grew, I was surprised to find that the outer layer of skin could actually peel back, slowly revealing a red glans, just like the day I inserted it into my sister's anus and then pulled it out.

My sister kept watching, and I curiously touched my glans, but felt an even stronger pleasure, one I had never experienced before, a tingling sensation like being electrocuted, and I couldn't help but let out a soft "ah."

My sister asked me what was wrong with her, and I replied that it felt strange, but also very comfortable, so I started touching my glans again to study it. My sister only looked and didn't touch, but at least I got the pleasure I'd been craving, so I was satisfied.

That night, we didn't turn off the lights to sleep; actually, I was the one who kept her awake. We lay in our own beds, and I continued to hold my penis under the covers, rubbing the glans to feel the pleasure. I also whispered to my sister that this intense feeling was strange, and said other things.

When I asked my sister why she felt this way, she replied that she didn't know either. After all, at that time, my sister only knew about sex and chastity, and didn't know what pleasure was.

The next night, after showering, I immediately started masturbating in front of my sister, playing with the glans to feel the pleasure.

My sister, as usual, took off her own clothes and occasionally watched my masturbation while she started washing her own body.

I played excitedly until my sister finished washing herself and said to me, "Okay, take a shower first."

She picked up the soap and started washing me.

I stood obediently while she washed me. As she washed, she nervously looked up at me and asked, "Can I wash this part for you, sister?"

Hearing that my sister was willing to touch my penis again, I quickly replied, "Sure, sister always washes this part for me, right?"

So my sister finally reached out and grasped my penis and started scrubbing it. However, she only scrubbed the penis with her hand, never touching the glans.

"...Sister, won't you touch that red spot in front?"

After I asked this, my sister looked up at me for a while before finally touching it with her finger, giving me a different kind of strange sensation.

So, my sister scrubbed my penis, then my scrotum, then the glans, and it felt really good.

"Sister..."

"What is it?"

"Can I ask you something?"

"What?"

"That day... when I inserted it into your butt... did it hurt a lot?"

My sister was still washing my penis with her head down, a little shy and smiling, and said, "It only hurt a little bit..."

"Sister screamed so loudly that time, I thought you were in pain too... but I felt really pain then..."

So we returned to silence, letting my sister continue to "wash" my penis, and she had been washing it for more than ten minutes...

"...Do you want to do it like that night again?"

Hearing my sister suddenly ask me this really startled me, and I quickly answered, "No! It will hurt a lot!"

My sister just smiled and didn't say anything, and then after a few minutes she asked me again, "Are you really willing to take care of your sister from now on?"

I felt a little strange that my sister suddenly asked me this, so I just nodded in response, and then my sister finally looked up at me...

(III)

My sister was very strange for those few days, as if she had something to say to me, but in the end she just called me and said it was nothing.

It was at night when we were lying in our own beds. I was about to fall asleep, but my sister would sometimes suddenly call me back, and then fall silent. I asked her several times what was wrong before she finally said nothing.

The last time, I got a little annoyed and was about to ignore her and go to sleep, but then she called me again.

"What is it?!" I asked her impatiently.

She finally managed to say, "Did you secretly watch the videotapes in Mom and Dad's room?"

I simply nodded, and then she said, "Tomorrow afternoon, when Mom and Dad aren't home, can you show them to me?"

When I heard her say that, I thought, if it was just something like that, why was she being so hesitant these past few days? I simply agreed, and she just vaguely said, "Because I haven't watched them..." and then didn't say anything more.

The next afternoon after school, after lunch, I took my sister into Mom and Dad's room and took out two or three videotapes from the cabinet, asking her which one she wanted to watch.

The videotapes all featured women posing in various lewd positions, occasionally showing scenes of intercourse. My sister stared at them for about ten seconds, then suddenly asked, "Have you seen all of these?"

"No, these seem to be ones Dad recently rented."

"Then put this one..."

My sister handed me one of the tapes. I curiously looked at the box, wondering why she chose this one, but I couldn't see anything special about it. Maybe she liked the actress.

The tape was inserted into the machine, and I turned on the small TV and sat on my parents' bed with my sister. My sister stared intently at the content, while I pulled down my pants and masturbated.

Neither of us spoke. My sister's attention was mainly focused on the TV, while mine was half on the TV and half on my penis.

About half an hour later, the scene finally showed the two having intercourse. The man inserted his penis into the woman's anus, and they both looked like they were enjoying it, but I was just thinking, "Liar, it clearly hurts when it goes in. It's better to just touch it myself."

My sister just kept watching without saying a word.

Finally, the scene ended, and the man sprayed his white fluid into the woman's mouth. That was it.

I asked my sister, "Should I turn off the TV?"

She nodded, so I took the DVD out, turned off the TV, and put my pants back on...

I thought that once the movie was over, my sister wouldn't be like before, but she seemed even more preoccupied that day.

That night, as I was about to turn off the lights and go to sleep, my sister suddenly called me again and whispered, "Are you asleep?"

"Not yet..."

Then she didn't say anything. I waited a few more minutes, and just as I was about to give up on sleeping, my sister said, "After you hear Mom and Dad go back to their room to sleep, come to my bed and chat with me, okay?"

Although I found it strange that I had to wait until my parents went back to their room, I still agreed. But while waiting for the sound of my parents going back to their room, I actually fell asleep.

The next morning, my sister woke me up for school. She asked me why I fell asleep last night, and I remembered this and said I was really sleepy and suddenly fell asleep. My sister didn't say anything. So I mentioned again that I would definitely come and chat with her that night, and she nodded and said "okay."

While showering that night, my sister secretly scrubbed my penis, studying it for a while without saying a word. After she finally satisfied her curiosity, I soaked in the water waiting for her to play.

When we turned off the lights and went to sleep, I tried hard to stay awake. Finally, I heard my parents' bedroom door close, so I grabbed my pillow and quietly went to my sister's bedside. She pulled up the covers and let me lie down.

We rarely slept together, so we lay on our sides, looking at each other, and couldn't help but smile.

"What does my sister want to talk to me about?"

I asked. My sister returned to her smiling silence, and after half a minute, she said shyly, "Can you take your pants off?"

I didn't know what she wanted to do, so I asked her, but she just said, "Just take them off."

So, I reluctantly started taking off my pants under the covers.

Just as I took them off, my sister reached out from under the covers and suddenly pulled down my underwear, looking at me with a slightly nervous and shy smile.

I suddenly realized that my sister might want to play with my penis, just like I used to play with it by myself when I slept. So I asked her if she wanted to touch it. If this was what she meant by chatting, then I would really be willing to chat with her every night.

"Hmm..." my sister finally answered with a smile, and I felt relieved enough to let her touch it. She quickly took it in her warm hand and started rubbing it until it got bigger.

"...Will you always hate it when your sister does this to you?"

my sister asked me worriedly. I told her no, I like it too.

Then we just lay on our sides, looking at each other and smiling, feeling the mystery of sex, secretly playing children's sex games.

Actually, my sister has always been very curious about sex, after all, she's only in fifth grade. It's just that she understands that you can't do this kind of thing casually, so she's always been very reserved.

My sister kept touching and playing with my penis, while I kept my hand on her arm. We were just happily talking about how hot or hard my penis was. I even joked that when I grew up, I wanted my penis to be as big as Arakawa's in City Hunter. After

playing happily like this for a while, my sister asked, "Don't you think that because I touch your penis while I'm showering, I'm a bad girl?"

I quickly shook my head because my sister had always taken good care of me and was very kind to me. She was willing to touch my penis like this, so she finally smiled and said to me with some relief, "You'll take care of and protect your sister when you grow up, right?"

"Yes..."

Then my sister stopped talking for a while and continued to play with my penis under the blanket.

After a while, my sister called my name, "You..."

"What is it?"

My sister suddenly started to panic and said, "I'm really curious... and it doesn't matter now... so I..."

I still didn't understand what my sister wanted to say, so I just kept looking at her. Finally, my sister made up her mind and said, "...Do you want to try again?"

She asked me with a slightly nervous and shy smile, but I suddenly didn't understand, so I asked her what she meant.

"...It's...try inserting it into my ass again..."

"But didn't you say that would take your virginity?"

I asked her worriedly, but she just said, "It's okay if you're willing to take care of me."

Even though she said that and offered to do it with me again, I was the one who asked, worried and scared, "Will it hurt again?"

She said, "Didn't Dad tell you that boys shouldn't be afraid of pain? Otherwise, how will you protect me in the future?"

And so, that night, my sister and I began our real sexual relationship...

Although I was afraid of the pain, I didn't dare resist her because she had always been very good to me. So, after reluctantly agreeing, my heart was still filled with fear and unease.

My sister worriedly warned me that if it still hurt, I had to endure it and not make a sound so that Mom and Dad would find out, or I would be beaten.

"When you grow up, you have to take care of and protect your older sister..."

Then I felt my sister start taking off her pajama bottoms and underwear under the covers. She smiled at me, slowly leaned closer, and gently hugged me. We lay on our sides like that on the bed.

My sister's face was very close to mine, almost touching. Then I suddenly felt my sister's hand grasp my penis. Then her legs started moving around, I don't know what she was doing.

My sister kept smiling at me with a slightly nervous and shy expression. After her legs moved for a few seconds, I suddenly felt my sister move her body closer, and our stomachs touched. Then my penis was warmly squeezed, which felt quite comfortable.

My sister told me not to move and told me that she would use her thighs to squeeze my penis first, saying that she wanted to do it like that first.

I couldn't help but smile at my sister again. We gazed at each other for a while before my sister nervously said that she was ready and that I could do whatever I wanted.

Although my sister was ready, I wasn't. I'm terrified of pain, and besides, I didn't know how to do it...

"Sis... I don't know how to do it like this..."

Then my sister's eyes widened: "You don't

know how?" "I can't see like this..." Then my sister laughed again and asked me what I wanted to do.

"Can you lift the blanket? I can't see like this..."

My sister finally let go of me, spread her legs, no longer clamping my penis, and lifted the blanket.

I sat up on the bed, and in the dim nightlight, I could clearly see my erect penis and my sister's naked lower body.

My sister also sat up, her legs together, and she slightly covered her lower body with her hands.

I just stared at my sister's genitals until she smiled and said to me, "Is it okay now?" Only then did I think to continue.

My sister lay back down, her legs together and bent on the bed, watching me nervously, and slowly spread her legs apart, her vulva slowly being exposed in front of me, finally opening as wide as possible, her vaginal opening slightly open.

I was just staring, completely captivated, when my sister couldn't help but laugh and ask, "Are you ready yet?"

"Yes..." I replied nervously.

"You should be able to do it like in the videos..."

So I slowly climbed onto my sister, holding my penis in one hand, and slowly pressed it against her vulva, just like in the videos.

My sister's hands were on top of me, and her legs were raised and bent in the air because of the thrusting of my thighs and abdomen, just like the pose in the videos. She kept watching me nervously, occasionally glancing down at the place where we were about to intercourse.

Although I was afraid of pain, after hearing my sister tell me to be patient, I didn't dare say a word, letting the head of my penis move in and out of my sister's vulva, but because neither of us had any experience, we couldn't find the entrance to penetrate and accommodate her.

At first, my sister didn't say anything, but later she kept asking me nervously how it was going, so I could only tell her I couldn't get it in...

My sister seemed relieved, and then, not knowing what to do, asked me, "What should we do?"

I really didn't know what to do at the time, but then I suddenly remembered what happened in the bathroom that night, so I said, "Sis, do you want to stand on the floor and bend over with your butt sticking out? That way it'll be fine."

That was the position where I took my sister's place in the shower that day, so I already had experience, and I knew I could get in without any problem.

After hearing this, my sister thought for a while, then stood on the floor with her legs spread apart, bent her body forward, and rested her hands on the bed, looking back at me.

I quickly stood behind my sister's buttocks, grasped my penis, and leaned forward, quickly reaching the entrance of her vagina. My sister was still watching nervously, then I put my hands on her waist and started thrusting forward...

I was really afraid of pain, but suddenly I found that it didn't hurt. The first time it didn't go in, so I adjusted my position slightly and pushed forward again. I immediately felt my entire penis squeeze into a lump of flesh, a slight stinging sensation mixed with intense pleasure. My sister suddenly opened her mouth wide, as if she was about to scream.

My penis was quickly fully inserted into my sister's vagina, my lower abdomen even bumping against her buttocks. Warm pleasure kept coming from my penis.

"Sister, it's in! It doesn't hurt! It feels so good!" I excitedly told my sister.

But my sister frowned and whispered, "I feel so much pain..."

I was startled and didn't know what to do, but my sister just told me not to move and then turned her head back to look at the bed.

A minute or two passed like this. I enjoyed the warmth of my sister's vaginal muscles while keeping still as she instructed. Then she turned back to me and said calmly, "Try pulling your penis out and then putting it back in."

As soon as I pulled my penis out as she said, I felt an explosive pleasure again, but my sister quickly said, "Don't move, it will still hurt."

So

I didn't dare to move again...

"It hurts so much..." my sister frowned at me, "But it didn't hurt this much last time..."

That night, we tried a few more times, but my sister still couldn't bear it, and in the end we had to end it hastily.

Although I didn't feel any dissatisfaction and even grew to love the feeling of penetrating my sister's anus, my only concern was that she might feel pain, but at least she didn't blame me.

From that day on, whenever my sister thought of it and was willing to try it, we would secretly play sex games while showering or before going to bed.

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Be gentle when your naughty little brother fucks my ass.

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