My Girlfriend's Sister's Graduation Ceremony (Transformation Series Adult Novel)

After I fucked my girlfriend's sister Xiaoyue on the balcony in Jiufen last time, our relationship has been getting better and better, but my girlfriend still doesn't know about Xiaoyue and I. If she knew, I don't know what would happen. Maybe the three of us would just hang out together, but I still don't have the courage to tell her. June is here and it's the time when Xiaoyue will graduate from high school. She told me and my girlfriend last Monday that their graduation ceremony would be on Saturday and she hoped that my girlfriend and I could attend. Of course I couldn't miss this opportunity to get us closer, so I readily agreed to attend and give her a bouquet of flowers. Xiaoyue was very happy to hear that and kept telling my girlfriend that I was a really nice person.

On Saturday morning I rode my bike to pick up my girlfriend. She was wearing a pink dress with spaghetti straps. She sat astride my motorcycle, half of her white thighs exposed from her short skirt. From the side, you could see her bra style under her arms. Her breasts were tall and her figure was great. Many people stared at her along the way. There was also a motorcyclist in front of me who was staring at the rearview mirror. He stopped at the traffic light and didn't overtake any other car behind him. I really didn't know what he was looking at! Will my girlfriend's skirt be seen? When she got off the bus, her underwear was exposed and seen by the students opposite. A group of students were talking about my girlfriend. Since we were across the street from each other, I could only hear intermittent words like "the white one looks good on and the butt looks nice." I walked into the school gate with my girlfriend, and the group of students opposite followed us in. They were also from this high school.

After searching for a while, I finally found Xiaoyue's class and saw Xiaohui and Qiqi. They waved and greeted us. They all wore student skirts that were altered to be shorter, as if a gust of wind would lift up their skirts. The three of them were happily talking to my girlfriend. I stared at the three of them. Xiaohui was the tallest, so the skirt looked even shorter on her. Her height of 167 made her legs look very long and thin, and her short hair made her look even more lively and beautiful. Qiqi had a ponytail on her forehead and a popular trimmed doll head, which made her look very cute. Xiaoyue had two braids that were shaking, and her hairstyle was the same as when I fucked her in the living room, except that she changed into school uniforms. My girlfriend kept talking to them about topics that I was not interested in, so I told them that I would walk around. There are really a lot of beautiful girls in the school, and sometimes I would see some girls showing their underwear when I went up the stairs. I walked around, drank a bottle of drink, and wanted to go to the toilet, so I walked to the toilet at the far left of the building. There were not many people there, it turned out that this was a first-grade classroom. All the first-grade students went to the auditorium, so I went into the toilet.

As soon as I entered the restroom, I heard a girl making sounds like "Oh, well, be gentle, it will hurt." The sound came from the last restroom. I quietly walked over and put my ear against the door. From inside the door came the sound of flesh slapping against flesh. It seemed like someone was having sex in the restroom. She was so bold. I guess students wouldn't dare to have sex in the restroom at their graduation ceremony! I guess it was someone from outside the school who dared to do it in the bathroom while the first-year students and teachers were in the auditorium. I continued to listen.

Oh, I’m going to die, it feels so good! ! ! ! The sound seemed so familiar, the sound of two pieces of flesh slapping together, mixed with obscene words.

Ade, stop interrupting or we’ll be too late to get to the auditorium! Oh yeah

I'll fuck you so hard that you'll want to find my male voice next time

Ah, it feels so good and my pussy is so full! Insert it faster!

I quietly went into the room next to them and stood on the toilet. I looked down and saw a short-haired girl in a school uniform with her hands on the wall with her butt raised high. Behind her, there was a boy in a school uniform fucking her from behind. The boy kept thrusting forward, and the girl seemed to enjoy it. She raised her face up. Wow! It turned out to be Xiaohui.

It turned out that Xiaohui was so slutty that she had sex with others at school. If I had known this, I would have done it with her in Jiufen. I secretly peeked in and was afraid of being discovered by them, so I quickly went out of the bathroom, but found two people who looked like bad boys walking towards the bathroom. I thought, I don’t know what would happen if they found Xiaohui in the bathroom, so I secretly followed them and watched outside the bathroom door. The two of them first urinated in the urinal, and then heard Xiaohui’s lewd sounds coming from the last bathroom, so they ran to the next room like me and stood on the toilet to watch. After watching for a while, they suddenly talked to the boy inside.

"Ade, you are having a great time here! We have been looking for you for a long time. Didn't you say you would introduce your sister to us?" said one of the fat bad boys.

"Ah, who is that?" Xiaohui said in shock.

"Don't be impatient, Xiaopang! I'll introduce other girls to you in our class later. Go wait outside our classroom first."

"No, we have to watch it here or we can go to your class and tell your sister-in-law later."

"Don't tell Qiqi," Xiaohui said while being fucked

It turned out that it was Qiqi's boyfriend who was having sex with Xiaohui. The relationships among high school students are so messy nowadays!

"Ade, open the door so we can see more clearly," said the taller one.

"This Xiaohui" Ade seems to be in a difficult situation

"Otherwise we will go to your class and tell everyone what you are doing here."

"Don't tell us! We will obey you!" Xiaohui said

So the door opened and Ade came out with pants in his hand

"Is this necessary?" Ade said as he put on his pants.

"If you don't want to do it, your classmates may not be satisfied yet!" said Xiaopang

"Otherwise, we will go to your class later and you might not get your diploma!" said the tall man.

"Ade looked at Xiaohui in the toilet. Xiaohui seemed to be so anxious that she was about to cry.

"Don't do that. If someone sees me, I'll be finished," Xiaohui said.

"No one will see it. Ade will be keeping watch outside," said the tall man.

I was afraid that Ade would come out so I ran to hide behind a tree to smoke, but I could still see the toilet door. After a while, Ade came out. I don't know what they said next to threaten Ade and Xiaohui. Ade looked around stealthily and looked back into the toilet from time to time. When he finished his first cigarette and was about to leave, he saw his girlfriend, Xiaoyue and Qiqi coming from the corner. They happened to see Ade at the door, so Ade ran over quickly. I couldn't hear what they said due to the distance. But I could see Ade's panicked face. He was probably afraid that they would go into the toilet. After talking to them, Ade and them walked towards the auditorium. I really don't know what method Ade used to get rid of them. I saw them walk away, so I ran to the door to replace Ade's position, but hid behind the door and watched secretly.

I saw Xiaohui wearing her uniform with the buttons undone and her student skirt still on, squatting with her legs spread out, facing the door. There was a man standing on each side. Xiaohui was holding two cocks with each hand, and her face was facing Xiaopang, who still had his cock in her mouth, and her other hand was constantly stroking the tall man's cock. The two men looked down at Xiaohui, who couldn't make any sound and only made "hmm" sounds with her nose. I looked under Xiaohui's skirt and found that her panties were gone!

"Suck harder, lick it with your tongue, and open your eyes to see that my big cock is bigger than Ade's!" said the fat boy

Xiao Hui nodded and answered while sucking Xiao Pang's cock

I saw that Xiaohui's skirt was wet, and her left hand was still stroking the tall guy's cock back and forth. The tall guy seemed to close his eyes and enjoy it. The tall guy's cock was thin and long and hooked up, and Xiaohui's mouth kept making a "sizzling sound"

"Little Fatty, let's change our positions," the tall one said

"Okay." Xiaopang pulled his cock out of Xiaohui's mouth, still holding the string.

So Xiaohui was pulled to stand up. Xiaopang used his hand to push Xiaohui's head down. Xiaohui held Xiaopang's waist with both hands and leaned forward to suck his dick. Because Xiaopang was shorter, Xiaohui stood and bent over to suck, so her ass was raised very high, and her asshole and pussy were exposed from her student skirt. Seeing this, the tall guy held Xiaohui's waist and aimed his dick at her pussy and pushed it in.

"Ah, don't put it in." Xiaohui screamed as her mouth left Xiaopang's cock.

"Don't shout. You will feel very comfortable in a moment. Don't want us to leave. Just suck it well and don't be distracted." said Xiaopang

So Xiaopang pushed Xiaohui's head down again, and the tall guy lifted Xiaohui's skirt from behind and kept thrusting his dick in and out of Xiaohui's ass.

Seeing this, I felt that my girlfriend's sister and classmate were being fucked by two people in the bathroom. I couldn't help but wonder if I should step in to stop them. But then I thought it might be useless. What if the person in the bathroom was my girlfriend or Xiaoyue herself? So I continued watching

I saw Xiaohui spread her slender legs with her buttocks raised, and the tall guy kept sucking from the front and from the back. She had short hair and sometimes her cheeks would bulge. I believe Xiaopang's glans must be quite big because Xiaohui's mouth was wide open. Xiaohui kept sucking until her cheeks were sunken. Suddenly, Xiaopang said, "I'm going to cum. I'm going to cum in your mouth. Don't spit it out. Xiaohui shook her head, but Xiaopang jerked her head back and forth more vigorously. For the last time, Xiaopang even tiptoed forward and pulled out. As soon as Xiaopang's glans was pulled out, semen flowed down the corners of Xiaohui's mouth. Xiaohui seemed to be choked and coughed a few times, but the tall guy was still pumping from behind.

I think what the original poster said makes sense.