-Keep in mind this story isn't real, but is something that turns me on extremely. This is an impossible event, so never try this.-

I walked into school and was extremely excited. "Yes!" I exclaimed to myself. Every week the desks moved one back until you sat all the way in the back. Our school classrooms were huge and we had plenty of students, and every Friday everyone was asked to go to third period together. The people in the back could never be seen and it was a tradition that every week something naughty should happen. The only rule that applied was that if you weren't in the back, you couldn't look. If you did, then you wouldn't get to sit in the back next time. It was unfair to than person, but no one could care less. They just wanted their turn. Regardless of this, it was finally my turn in the back! My pussy was already dripping with excitement. I didn't know if I'd make it to third period before having to change. In first period, we had math class which was boring as fuck. Second period was P.E. and I always loved that class because not only was it Co-Ed, but everyone changed together. Today was a swimming day, and most of the guys changed by their girlfriend. My guy, Justin, walked over to me as he pulled down his pants. I saw his non-erected penis, and I couldn't help but smile. That would be in me next period. He looked at me and said "Haha, Nicki. I don't think anyone would care if we had an early start." That made me laugh, but I told him "No. Third period is two hours long today, and since you and I are both in the back, I'd rather wait until then." He smiled and said "Fine. I'll be waiting," and tied his swimsuit. We swam, and finally it was time for third period. This class was pretty much a lecture, and people only went to it as an excuse to get out of normal class, and of course, to sit in the back. As the bell rang and I heard the deep voice of the speaker, I looked over to Justin. He sensed what was coming and nodded in approval. He slid down his shorts and exposed his penis, now erect, and I looked in awe at a six and a half inch and I touched it. He smiled and said, "Go on." I pulled my blonde hair back, and opened my mouth wide. Justin smiled in anticipation, and began to moan in total pleasure as I began sucking. My head bobbed up and down and I felt his penis throb in my throat - a vital sign showing I was doing my job correctly. Suddenly, a fluid shot up into my mouth and I began sucking and swallowing it up, like a child having candy. I wanted more, but as quickly as it started, it stopped. I looked at him and said "Your turn!" We switched positions and I felt his tongue on my pussy and I began shaking. He put two fingers in me and started licking and devouring me and in minutes his face was covered in juices which made me even more excited than I already was. Then, I stood up, threw my shirt off, and sat on his re-erected dick and allowed him to remove my bra. I realized I was at his mercy and I began to ride him. Pain filled me and I wanted to scream, but as quickly as the pain started, it ended. It soon turned into pleasure and quickly I began screaming into his ear "Fuck me Justin! Fuck me!" He grunted and I felt his penis twitch. Then I felt a warm substance as he came into my pussy. I turned and hugged him and he hugged me back. For the rest of the day, cum dripped down my leg, and I know I can not wait until we have the back again.