Playing doctor game with my sister

Many people probably have similar experiences. Having a relationship with a younger sister of similar age when you're young. However, for many older brothers, it ends in rape. Regardless of the outcome, they never have a good relationship with their sister after growing up. But I'm an exception. And we continued to have sex even after we grew up. In elementary school, my sister and I often played doctor's games. Of course, this gave us opportunities to touch each other's bodies, even genitals. Elementary school girls aren't very clean and don't wipe themselves after using the toilet, so there's always a urine smell. So, our games were limited to touching. Of course, the main reason was that we were too young to understand anything; we just felt comfortable being touched. In middle school, everything changed. We started to understand sex, and the games changed. One time, I suddenly wanted to lick my sister's genitals but didn't know how to bring it up. It had been a while since we played doctor's games. Although she was only in sixth grade, she looked much older. She seemed like a young woman, not a child. She probably understood a little about sex! There was no way she would agree to play doctor's games with me again. Later, I came up with a brilliant plan. I achieved my dream, but ultimately suffered heavy losses. Summer vacation is the best time to do something like this. My sister and I were home all day, but no one was home. So, I carried out the first step of my plan: to break the lock on the bathroom door. I still admire myself for thinking of this method at that age. It was simple: just glue the lock shut with super glue so it couldn't be pressed down. Afterwards, I'd scrape off the glue with a blade, and no one would notice. The lock would be back to normal. The second step was just waiting. How could I know when my sister would go to the bathroom? But she would eventually… Finally, I waited until my sister went into the bathroom. She would definitely notice the door couldn't be locked, but since we were home, she probably wouldn't care too much. Of course, I had to wait a while for her to take off her pants and finish urinating. I listened carefully outside the door for the sound of running water to end. As soon as the sound stopped, I immediately turned the doorknob and went in. If I was even a step too slow and she couldn't put her pants back on, it would be a disaster. When I opened the door, my sister had just stood up, but she hadn't had time to put on her shorts and the white underwear rolled up on them. (Ah! Brother, what are you doing? I'm in the bathroom!) My sister was in a hurry to pull up her pants. (Can I see?) (Why should I let you see!) Because she was in such a hurry, she hadn't even finished pulling up her rolled-up underwear before putting on her shorts. (Anyway, I've seen it before. What's the harm in seeing it again?) (No!) She really knows how to handle things between men and women. (Then I'll buy you a Barbie doll. Let me see it.) (Really!) My sister started to consider it. Because she really wanted one, but Mom hadn't bought it for her. (Okay! But you really have to buy it for me!) As soon as I heard that, I immediately reached out to take off her pants. I was afraid she would change her mind again. As for whether I would buy it for her, I'd think about it later. (Close the door!) My sister suddenly shouted. (Oh!) I immediately turned around and closed the door. It turns out she can be shy too. Even though no one was home, I took off my sister's shorts first. Seeing her rolled-up underwear stuck in the middle was so cute. Not a single hair. I don't know why, even though there was no hair, it felt different from what I had seen before. I reached out and touched between her underwear and her vulva. (Wait a minute) I thought she wouldn't let me touch her anymore when she suddenly said that. But then I saw her take off her shorts and underwear, squat down, and wash her genitals with the showerhead. After washing, she dried herself with a towel. (Okay. You can touch me now.) Oh my god! So that's how it is. I was a little amused and exasperated, but since she was allowed to see and touch me, I figured she wouldn't object to a little licking. I thought, whatever, I'll just lick her. When I brought my mouth close, she just twitched her buttocks. When I started licking, she stopped moving. She let my tongue go in and out between her tightly closed legs. Maybe she hadn't seen porn before, so she didn't understand and didn't object. At that moment, only the word "pleasure" could describe it. Since it was my first time, I didn't dare to spread her thighs. I just kept licking her. Because it was already pleasurable enough. For the next summer vacation, I played licking her genitals with my sister almost every day. At first, we played in the bathroom. Whenever my sister went to the bathroom, I would follow her in, and she would know what I was going to do. She would cooperate automatically. Of course, there were many positions too. I liked it the most when she raised one leg on the toilet. I would lick her from below. That way, I could lick her entire vulva. One time, Mom happened to be home. My sister and I would definitely be discovered if we went into the bathroom together, but we really wanted to play. After thinking for a while, I realized the only place Mom wouldn't go was the rooftop, so I boldly asked my sister to go play there. I had her lean against the low wall of the rooftop. Luckily, she was wearing a skirt that day. I took off her panties and let her hold them. I put my head under her skirt and licked her like that. I didn't know if anyone would see us, but the feeling was incredibly pleasurable. Sometimes my sister and I would play nudist games at home. Back then, we didn't have air conditioning. Summer vacation was unbearably hot. I would make my sister strip naked all day long, until Mom came home. Firstly, it would be cooler that way, and secondly, I had promised to buy her a second Barbie doll, so she agreed. Since it was a loss, we had to play to our hearts' content. Whether my sister was watching TV or taking a nap, when I wanted to lick her vulva, I would reach out and spread her thighs. When I saw her legs spread in a V-shape, straddling the sofa armrest... Her slender body, completely naked, came into view. It's hard to imagine a man having the chance to see a young, innocent girl in such a lewd pose, and with her consent, he could lick her vulva incessantly. As long as you lowered your head and didn't block her view of the cartoon, she didn't care how long you stayed between her legs. It's a pity I didn't masturbate much back then, otherwise, tasting that tender, hairless vulva in my mouth while wielding my hard penis would have been so exhilarating… Years later, thinking about it now feels like a regret. However, by chance, I fulfilled this wish on another tender vulva. But that's a story for another time… (I'll tell you when I have the chance). This summer vacation was almost over. Besides playing with my sister's vulva, I didn't think about anything further. Now I wonder if I was too innocent or too naive back then. Anyway, by this summer vacation, my sister was still a virgin. After summer vacation, my sister entered the first year of junior high school. Of course, she went to the same school as me. I started going to and from school with her every day. I don't know why. I remember one time during a term exam, because I hadn't finished reading the book… My sister and I went to school to study early in the morning, around 6 a.m. There wasn't a soul in sight. We each stayed in our own classrooms to study. The moment I opened a book, I knew my doom was near. I hadn't even finished a ton of stuff. Suddenly, I heard running footsteps coming from the other end of the corridor. I thought, "So there's someone else here so early." When the footsteps stopped, I realized it was my sister. She was panting, holding a small pack of toilet paper. I wondered what she was doing. (Sister (pronounced like "mei" in Chinese). What are you doing?!) ("Come with me to the toilet! I'm scared to go now that no one's around.") School toilets are notorious for being spooky. They're really scary when no one's there. (Coward! Okay!) I had no choice but to take my books and accompany her to the girls' toilet. (We're here. Hurry up and go in.) I said in front of the toilet. ("Come in with me!") ("Okay!") At that moment, I thought, "Since you're the one who asked me to come in, I won't be polite." My sister opened the door to the small toilet stall, and I squeezed in, closing the door behind me. (Go a little further! Otherwise, how can I get on?) My sister said as she took off her underwear and squatted by the toilet. Hearing her pee, my little brother was already incredibly hard. I hadn't been this excited since the first time I licked her pussy. Maybe it was because I was busy with schoolwork and hadn't licked her for a while, or maybe it was because of school. After she finished peeing, I reached out and pulled her up, lifted her gray school skirt, and squatted down to lick her tender little pussy. (What are you doing! I haven't wiped yet. Wait a minute!) My sister said this, but it was too late. Although there was some urine on my sister's pussy, it made me even more excited. I sucked and licked with all my might. It seemed that if I sucked harder, honey would flow out of my sister's pussy. The wildness in my mind, coupled with my blood-filled penis, made me reach the point of no return. I rarely thought about penetrating my sister's pussy before, perhaps because I thought my sister was very clean and pure. I couldn't bear to destroy her. But today, in the dirty girls' toilet at school (actually, the girls' toilet is still a little cleaner than the boys' toilet), my sister's pussy had a slightly musky smell. Fine pubic hairs had grown along the cleft of her vulva. Her plump mons pubis looked like a freshly steamed white bun, tender and elastic. Her labia minora were slightly everted. She was wearing the same school uniform as the girls in her class: a white shirt and a gray pleated skirt. I had fantasized about one day taking off all the girls' uniforms and raping them. Today, I'd do it with my sister. I reached out to unbutton her shirt. She was still wearing the tank top Mom had bought for her. Mom probably thought her breasts weren't big enough and she didn't need to wear a bra! But from summer vacation until now, I knew very well that my sister's breasts had grown a lot. Pulling down her tank top, I stroked her perky breasts with one hand (I think only girls her age can be called perky!), while my other hand held a rolled-up textbook, so I decided to use it to rub my sister's vulva. Just as I was excitedly groping her, I suddenly heard voices outside. "Someone's at school," my sister whispered. I was a little reluctant. But the thought of being seen here would send me to the gallows when I got home filled me with rage. My sister had already pulled up her camisole and was fastening the buttons. I withdrew my hand from the textbook that had been rubbing against my sister's crotch, but then I saw...I reached her white panties hanging down to her ankles. A wicked idea suddenly popped into my head. (Come on. Lift your foot.) I pulled her panties off her ankles. (Why are you taking my panties?) My sister's voice was still very soft. (Don't ask so many questions. Come and get them from me after class.) Although my sister was reluctant, she was afraid someone would come over, so she reluctantly agreed. She pouted and hurriedly left the restroom, returning to her classroom. I then went to the men's restroom to continue my unfinished mission. I closed the restroom door and quickly pulled out my thing. I gently squeezed my sister's panties. At the bottom of the panties, where her vulva was covered, there was still a faint smell and warmth. It stimulated me to accelerate the efficiency of my senses until I released. After the first exam, there would be several tens of minutes of study time before the next exam. My sister must have felt embarrassed taking the exam without panties! Before I finished the exam, I saw her hand in her paper early and come to my classroom to find me. Seeing her peeking out of the classroom door, I wondered if anyone would see her walking around in the corridor without panties under her skirt. Although I knew I'd get punished for not finishing the exam, I handed it in early and pulled out the textbook I'd been carrying—my sister's underwear was hidden inside. I left the classroom and headed towards the school swimming pool. My sister naturally followed behind. Of course, the pool was empty at this time, but I couldn't get in without a key. Our destination wasn't the pool, but since it was exam day, no one would be around. There was a narrow alleyway next to the pool, barely wide enough for one person. One side was the pool wall, and the other was the school's outer wall. Both walls were taller than a person, so from any angle, it was impossible to see what was inside. It was a perfect spot. My sister and I walked until we reached the end of the alleyway, which was quite long. This made it even less likely anyone would notice. On the way, I let my sister walk ahead. To be honest, although she wasn't very tall, her butt was quite perky. It was very obvious even through her skirt, and I knew she wasn't wearing underwear. I got an erection the whole way. Finally, I stopped. Before he even turned around, I couldn't wait to lift her skirt. Oh my god! Although I'd seen my sister's genitals countless times, this time was the most exciting. Two pert buttocks (because she hadn't worn underwear in the previous exam, there wasn't a single trace of underwear on her buttocks. Pure and clean) connected to her slender legs, and she wore the school's required white knee-high socks and black leather shoes. This reminded me of the girls in my class. Usually, I only saw white socks and black shoes. Was the scene of walking up in those white socks and black shoes similar to my sister's? But at least they wore underwear! (Hmm. Hurry up, brother! We have an exam soon.) (Take off your clothes, okay?) I said this to her because I wanted to see what a female student looked like completely naked except for her shoes and socks. This was the standard attire for a female student's outdoor rape. Imagine my sister completely naked, with a cute ponytail. Slightly protruding nipples on her small breasts. Her tightly closed legs, only a beautiful Y-shape and a pure white mons pubis visible (you had to look closely to see she had pubic hair, just very light). In a quiet corner of the campus, under the not-too-intense sun, every inch of my sister's body was clearly visible. "No!" my sister said firmly. I was immediately doused with cold water. "If someone comes, I won't have time to put it on." "Okay!" Thinking about it, that made sense; if someone did come, I could "quickly" run away from the other side. "Lie down a little! Otherwise, your skirt will slip down again." At this point, my sister could only hold onto the wall with both hands, sticking her butt out high towards me, letting her skirt hang down to her waist. I casually lifted the hem of her shirt tucked into her skirt, ready to take my lick. "Wait!" my sister suddenly shouted, "Stop!" "What are you doing!" I was already a little annoyed at this point. "Let's make it clear first. No licking her poop." Haha. She remembered once when I wanted to lick her anus at home, but she couldn't resist me. She washed and dried it repeatedly in the bathroom, resulting in peeling skin… In the end, I helped her wipe her face with a face mask. I don't know if it was too cold or what, but she screamed loudly. This position probably made her think I was going to lick her butt. But my sister's buttocks are really white and flawless. Even if I licked them, no one would think it was dirty. (Okay! Lie down quickly.) From behind, her vulva really is just a pretty slit. (Spread your legs a little.) I placed my hands on her buttocks, using my thumbs to pry open her labia. My tongue only felt wet. The smell from the toilet earlier was gone. Maybe she wiped before coming, or maybe it was because she wasn't wearing underwear and it was drafty! I quickened the movement of my tongue, letting the pleasure of my tongue touching my sister's body reach my brain. Slowly, I released my fingers, letting her labia close. I opened my mouth and took her labia in. I buried my face between her buttocks and moved it up and down. Should I fuck her? I thought to myself. At this time, my penis was already incredibly hard. And my sister was in this most lewd position, perfect for penetration. I was having an internal battle. I've never done it here before, okay? (Ding. Ding. Ding. Ding. Ding. Ding. Ding. Ding. Ding. Ding.) Suddenly, the school bell rang. (Okay! Ten more minutes until we go back.) My sister said, turning around and flipping down her skirt. I thought to myself, fine. Anyway, there's no time left. I'm not doing it anymore. To be honest, I was really timid back then. I turned to look for the textbook I had just put on the ground. There were my sister's panties inside. (I'll help you put them on.) I held her panties in my hand, looking at which side had a small bow. Because that's the front of a little girl's panties. My sister put her hand on my shoulder, took off one shoe, and put her foot into the panties. After a flurry of activity, I finally pulled her panties up and put them on. We went back to the classroom to continue the exam. Of course, my grades on this exam were all over the place. I was severely punished at school and at home. Later, because of some other reasons, I didn't have a chance to see my sister until the high school entrance exam. During this time, my sister got her first period. She started to grow up. She really felt different. In fact, many people should have the same experience. Having a relationship with a sister of similar age when they were young. It's just that many older brothers end up raping her. No matter the outcome, I know I won't have a good relationship with my sister when we grow up. But I'm an exception. And we've continued to have sexual relations even after we grew up. In elementary school, my sister and I often played doctor's games. Of course, this gave us the opportunity to touch each other's bodies, even our genitals. Elementary school girls aren't very clean, and they don't wipe themselves after using the toilet, so there's always a urine smell. So, our games were limited to touching. Of course, the main reason was that we were too young to understand anything; we just felt comfortable being touched. In junior high, everything was different. We started to understand what sex was. The way we played naturally changed. One time, I suddenly wanted to lick my sister's genitals, but I didn't know how to bring it up. It had been a while since we played doctor's games. Although she was only in sixth grade, she looked much older. She was like a young girl, not a child. She should understand sex a little bit now! There was no way she would agree to play doctor's games with me again. Later, I came up with a clever plan. I achieved my dream, but ultimately suffered heavy losses. Summer vacation is definitely the best time to do this kind of thing. My sister and I are home all day, but no one's home. So I carried out my first plan: to break the lock on the bathroom door. I'm still quite impressed with myself for coming up with this method at that age. It's simple: just use super glue to stick the lock so it can't be pressed down. Afterwards, just scrape off the glue with a blade, and no one will notice. The lock will be working normally again. The second step was just a matter of waiting. How could I know when my sister would go to the bathroom? But she would eventually... Finally, I waited until my sister went into the bathroom. She would definitely find that the door couldn't be locked, but since we were home, she probably wouldn't care too much. Of course, I had to wait a while for her to take off her pants and finish urinating. I listened carefully outside the door for the sound of running water to end. As soon as the sound stopped, I immediately turned the doorknob and went in. If I was even a step too slow and she couldn't put her pants back on, I was doomed. When I opened the door, my sister had just stood up, but she hadn't had time to put on her shorts and the white underwear rolled up on them. (Ah! Brother, what are you doing? I'm in the bathroom!) My sister was in a hurry to pull up her pants. (Can I see?) (Why should I let you see!) Because she was in such a hurry, she hadn't even finished pulling up her rolled-up underwear before putting on her shorts. (Anyway, I've seen it before. What's the harm in seeing it again?) (No!) She really knows how to handle things between men and women. (Then I'll buy you a Barbie doll. Let me see it.) (Really!) My sister started to consider it. Because she really wanted one, but Mom hadn't bought it for her. (Okay! But you really have to buy it for me!) As soon as I heard that, I immediately reached out to take off her pants. I was afraid she would change her mind again. As for whether I would buy it for her, I'd think about it later. (Close the door!) My sister suddenly shouted. (Oh!) I immediately turned around and closed the door. It turns out she can be shy too. Even though no one was home, I took off my sister's shorts first. Seeing her rolled-up underwear stuck in the middle was so cute. Not a single hair. I don't know why, even though there was no hair, it felt different from what I had seen before. I reached out and touched between her underwear and her vulva. (Wait a minute) I thought she wouldn't let me touch her anymore when she suddenly said that. But then I saw her take off her shorts and underwear, squat down, and wash her genitals with the showerhead. After washing, she dried herself with a towel. (Okay. You can touch me now.) Oh my god! So that's how it is. I was a little amused and exasperated, but since she'd seen it and let me touch her, she probably wouldn't object to me licking her too! Whatever, I'll just lick her first. When I brought my mouth close...She just twitched her buttocks slightly. When I started licking, she stopped moving, letting my tongue go in and out between her tightly closed legs. Maybe she hadn't seen porn before, so she didn't understand and didn't object. At that moment, only the word "pleasure" could describe it. Since it was my first time, I didn't dare to spread her thighs. I just kept licking like that. Because it was already pleasurable enough. For the next summer vacation, I played licking her pussy with my sister almost every day. At first, we played in the bathroom. Whenever my sister went to the bathroom, I would follow her in, and she would know what I was going to do. She would cooperate automatically. Of course, there were many positions. I liked it the most when she raised one leg on the toilet. I would lick from below. That way, I could lick her entire pussy. One time, my mom happened to be home. If my sister and I went into the bathroom together, we would definitely be discovered. But I really wanted to play. After thinking for a long time, I realized that only the rooftop was safe for my mom, so I boldly asked my sister to play on the rooftop. I had my sister lean against the low wall of the rooftop. Luckily, she was wearing a skirt that day. I took off her underwear and let her hold it. I put my head under her skirt and licked her like that. I didn't know if anyone would see us. But the feeling was incredibly pleasurable. Sometimes my sister and I would play nude games at home. Back then, we didn't have air conditioning. Summer vacation was unbearably hot. I would make my sister strip naked all day long, without wearing any clothes until Mom came home. Firstly, it was cooler that way, and secondly, I had promised to buy her a second Barbie doll. So she agreed. Since we were losing money, we had to play to our hearts' content. Whether my sister was watching TV or taking a nap, when I wanted to lick her vulva, I would reach out and spread her thighs. When I saw my sister's legs spread in a V-shape, straddling the sofa armrest, her slender body completely naked came into view, it was hard to imagine a man having the opportunity to see his young, innocent sister in such a lewd position, and you could lick her vulva endlessly with her consent. As long as you lowered your head a little so as not to block her view of the cartoon, she didn't care how long you stayed between her legs. It's a pity I didn't masturbate much back then, otherwise, I would have been enjoying her tender, hairless vulva. It was so exhilarating to have my subordinate wielding a powerful cannon... Years have passed. Thinking about it now, it feels like a pity. However, by chance, I fulfilled this wish on another tender little hole. But that's a story for another time... (I'll tell you when I have the chance). This summer vacation is almost over. Besides playing with my sister's pussy, I didn't think about taking anything further. Now I wonder if I was too innocent or too naive back then. Anyway, my sister was still a virgin until this summer vacation. After the summer vacation, my sister went to the first year of junior high school. Of course, she went to the same school as me. I started going to and from school with her every day. I don't know why. I remember one time during the term exam, because I hadn't finished reading the books, my sister and I went to school early in the morning to study. At that early, there wasn't a bird in the school, so there was no one there. We each stayed in our own classrooms to study. As soon as I opened my book, I knew that my doom was not far away. There was still a lot of stuff I hadn't finished reading. Suddenly, I heard running sounds coming from the other end of the corridor. I thought, so there's someone else here so early. When the footsteps stopped, I realized it was my sister. I saw her running, panting, clutching a small pack of toilet paper. What was she going to do? (Sister (pronounced like "mei" in Chinese). What are you going to do?!) (Come with me to the toilet! I'm scared to go now that no one's around.) School toilets are notorious for spooky talk. They're really scary when no one's there. (Coward! Okay!) There was no other way. I had to take my books and accompany her to the girls' toilet. (We're here. Hurry up and go in.) I said in front of the toilet. (Come with me!) (Okay!) At that moment, I thought, "You're the one who told me to go in. So I won't be polite." My sister opened the door to the small toilet stall, and I squeezed in, closing the door behind me. (Move over a bit! Otherwise, how can I use it?) My sister said as she took off her underwear and squatted by the toilet. Hearing her pee, my little brother was already rock hard. I hadn't been this excited since the first time I licked her vulva. Maybe it was because I was busy with schoolwork and hadn't licked her for a while, or maybe it was because of school. After she finished urinating, I reached out and pulled her up, lifting her gray school skirt and squatting down to lick her tender little vulva. (What are you doing! I haven't wiped yet. Wait a minute!) Although my sister said this, it was too late. Although there was some urine on my sister's vulva, it made me even more excited. I sucked and licked with all my might. It seemed that if I sucked harder, honey would flow out of my sister's vulva. The wildness in my mind, coupled with my blood-filled clitoris, made me reach the point of no return. I rarely thought about penetrating my sister's vulva before, perhaps because I thought she was very clean and pure. I couldn't bear to hurt her. But today, in the dirty girls' restroom at school (actually, the girls' restroom is a little cleaner than the boys' restroom). My sister's vulva had a slightly musky smell. Along the cleft of her vulva, I could see that fine pubic hair had grown. Her plump mons pubis was like a freshly steamed white bun. It was tender and elastic. Her labia minora were also slightly turned outward. She was wearing the same school uniform as the girls in her class: a white shirt and a gray pleated skirt. I'd fantasized about one day stripping all the girls in my class of their school uniforms and raping them. Today, I'd start with my younger sister. I reached out to unbutton her shirt. She was still wearing the tank top Mom had bought for her. Mom probably thought her breasts weren't big enough and she didn't need to wear a bra! But since summer vacation, I knew very well that her breasts had grown a lot. Pulling down her tank top, I stroked her perky breasts with one hand (I think only girls her age could be considered perky!), while my other hand held a rolled-up textbook, deciding to use it to rub against her vulva. Just as I was excitedly groping her, I suddenly heard voices outside. "Someone's at school," my sister whispered. I was a little reluctant. But then I thought that if someone saw us here, we'd be on the gallows when we got home. My sister had already pulled her tank top back up and was fastening the buttons. I withdrew the textbook I was using to rub against her crotch, but then I saw her white panties hanging down to her ankles. A very wicked idea suddenly popped into my head. (Come on. Lift your foot) I pulled down my sister's panties from her ankle. (Why are you taking my panties?) My sister's voice was still very soft. (Don't ask so many questions. Come and get them from me after class.) Although my sister was very unwilling, she was afraid that someone would come, so she reluctantly took them. She pouted and hurriedly left the toilet. She returned to her classroom. I then went to the men's toilet to continue my unfinished mission. I closed the toilet door and quickly took out my thing. I gently squeezed my sister's panties. At the bottom of the panties, where her vulva was covered, there was still a faint smell and warmth. It stimulated me to speed up my sensory operation until I released. After the first exam, there would be several tens of minutes of review time before the next exam. My sister must have felt embarrassed that she didn't wear panties for the whole exam! Before I finished the exam, I saw her hand in her paper early and come to my classroom to find me. Seeing her peeking out of the classroom door, I thought about how she was walking around in the corridor without panties under her skirt and wondered if others would see her. Although I didn't finish the exam and would get punished later. But I still handed in my paper early, took out the textbook I'd been rolling up in my bag (which still contained my sister's underwear), and headed towards the school swimming pool. My sister naturally followed behind. Of course, the swimming pool was empty at this time, but I couldn't get in without a key. Our destination wasn't the swimming pool, but since it was exam day, no one would be passing by. There was a narrow alleyway next to the pool, barely wide enough for one person. One side was the swimming pool wall, and the other was the school's outer wall. Both walls were taller than a person, so from any angle, it was impossible to see what was inside. It was a perfect spot. My sister and I walked until we reached the end of the alleyway, around the corner. It was quite long, to be honest. This made it even less likely anyone would know we were there. On the way, I let my sister walk ahead. To be honest, although she wasn't very tall, her butt was quite perky. It was still very obvious through her skirt, and I knew she wasn't wearing underwear. I got an erection the whole way. Finally, I stopped. Before she even turned around, I impatiently lifted her skirt. Oh my god! Although I've seen my sister's genitals countless times, this time was the most exciting. Her two pert buttocks (because she hadn't worn underwear in the previous exam, there wasn't a single trace of underwear on her buttocks; they were clean and white) connected to her slender legs, and she wore the school's required white knee-high socks and black leather shoes. This reminded me of the girls in my class. Usually, I only saw white socks and black shoes. Was the scene of them wearing white socks and black shoes similar to my sister's? But at least they wore underwear! (Hmm. Hurry up, brother! We have an exam soon.) (Take off your clothes, okay?) I said this to her because I wanted to see what a female student looked like completely naked except for her shoes and socks. This was the standard attire for a female student's outdoor rape. I imagined my sister completely naked, with a cute ponytail. Her small breasts had slightly protruding nipples. Her tightly closed legs only revealed a beautiful Y-shape and her clean mons pubis (you had to look closely to see that she had pubic hair, though it was very light). In a quiet corner of the campus, under the not-too-intense sun, every inch of my sister's body was clearly visible. "(No)," my sister said firmly. I was immediately doused with cold water. "(If someone comes, I won't have time to put it on.) (Okay!) Thinking about it, that makes sense. If someone really comes, I can 'quickly' run away from the other side. (Lie down a little! Otherwise, your skirt will slip down again.) At this point, my sister could only hold onto the wall with both hands, sticking her butt out high towards me, letting her skirt hang down to her waist. I casually lifted the hem of her shirt tucked into her skirt, ready to take my breath. "(Wait a minute!)" my sister suddenly shouted, "Stop!" "What?"(Oh!) I was already a little annoyed at this point. (Let's make it clear first. No licking her poop.) Haha. She remembered once when I wanted to lick her anus at home, but she couldn't resist me. She washed and wiped it repeatedly in the bathroom, which made her skin peel... In the end, I helped her wipe her face with a face cream. I don't know if it was too cold or what, but she screamed. This position probably made her think I would lick her butt. But my sister's butt is really white and flawless. Even if I were to lick it, no one would think it's dirty. (Okay! Lie down quickly.) From behind, her vulva really is just a very pretty slit. (Spread your legs a little.) I placed my hands on her buttocks and used my thumbs to pry open her labia. My tongue only felt wet. The smell from the toilet earlier was gone. Maybe she wiped herself before coming, or maybe it was because she wasn't wearing underwear and it was breezy! I quickened the movement of my tongue, letting the pleasure of my tongue contacting my sister's body reach my brain. Slowly, I released my fingers and let my sister's pried labia close. I opened my mouth and took my sister's labia in my mouth. I buried my face between her buttocks and moved it up and down. Should I do it to her? I wondered to myself. By this time, my penis was already incredibly hard. And my sister was in this lewd position that was perfect for penetration. I was having an internal battle. I've never done it here before, okay? (Ding. Ding. Ding. Ding. Ding. Ding. Ding. Ding. Ding) Suddenly, the school bell rang. (Okay! Ten more minutes to go back.) My sister said as she turned around and flipped down her skirt. I thought, okay. Anyway, there's no time. I won't do it. To be honest, I was really timid back then. I turned to look for the textbook I had just put on the ground. There were my sister's panties inside. (I'll help you put them on.) I held her panties in my hand and looked at which side had a small bow. Because that was the front of a girl's panties. My sister put her hand on my shoulder, took off one shoe, and put her foot into the panties. After a flurry of movements, I finally pulled her panties up and put them on. We went back to the classroom to continue the exam. My exam results were, of course, a complete mess. I got a severe beating at school and at home. Later, due to some other reasons, I didn't have a chance to see my younger sister until the high school entrance exams. Around this time, my sister got her first period. She's starting to grow up. She really seems like a completely different person.

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Playing doctor game with my sister

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