Note: This story was dynamically reformatted for online reading convenience. I was at the beach with my friends, two guys and one girl, even though we were at the beach, I had worn a t-shirt over my bikini to protect from the sun. while there we met my rival, Kim, hanging out with her friend, she began to tell the two guys all about how she would constantly strip me naked, and my friend even joined in to detail my humiliating stories. "So how about a challenge, Luna? Or are you scared?" Kim was goading me into a challenge, and I tried my best to seem unreceptive, but I'm sure they all knew what my answer would be. "What do you suggest?" I asked about the nature of the challenge. "Simple, we play beach volleyball, you need another player with you, for every point your team loses, you lose one piece of clothing, oh and this only applies to the two of us, our partners can remain clothed." Kim explained, and my girl friend immediately volunteered. Aside from the shirt I had on, I also wore some flip-flops, which made a total of four pieces, Kim also had footwear on alongside a sash that was tied on her waist. we began the game, and since my friend knew of my love of being stripped, she deliberately missed her shots, or didn't bother to hit any throughout the entire game, which made it seem more like a 2 on 1 game than anything, I did manage to win the first point, which had kim remove her footwear, but it was downhill from there, as I lost the next point, I removed my flip-flops almost immediately. That wasn't the end of it, as my friend left a ball coming towards her side, I had to race just to try and catch it, but I failed, which meant that I had to remove my shirt. My failure continued as Kim scored the next point, and I had to remove my bikini top in public! I was standing there exposing my breasts to the entire beach, and I was loving every second of it, people were beginning to gather around to watch me play topless. My excitement might have interfered with my playing, as I lost the next point in record time, I lost my bottoms, taking them off and leaving myself naked in front of everyone to see, it felt wonderful, now everyone was cheering my humiliation on, and the crowd had gotten much bigger. Kim came over to my side of the net to gloat, she grinned and tweaked my nipples cruelly, our friends laughing as I let out a pleasure mixed yelp of pain. "Once again Luna, you stand before me naked and humiliated," I was, but she wasn't done yet "I'll give you a chance, we play again, and I have four forfeits planned for you, one for each point you lose, if you manage to get me naked me before then, I will be yours for the rest of the day, but if you lose, your body belongs to me, and to help you out, I'll even take this sash off." And so Kim did a sort of sexy sway as she took off her sash, taunting me by giving my team a handicap. Suffice to say, I didn't manage to win one point, and I had to perform all four forfeits before I became my rival's slave. The first forfeit was a spanking, Kim had me bend over and grab onto the volleyball net as she delivered 50 swats to my behind, she also forced me to sound off the number of the smack, and to add in "thank you, may I have another." to it after each one. "Fifty! Thank you, may I have another." I sounded off, quite enjoying my humiliating punishment. "No Luna, I'm done indulging your perverted spanking fetish." Kim replied snidely, and the crowd laughed at me for clearly enjoying the punishment. My second forfeit was to pose in different ways, exposing my privates and describing them to the audience, who were encouraged to photograph and video my humiliation, as well as make many embarrassing statements, such as: "My name is Luna, and I'm a pathetic loser who can't help but be enslaved by my talented mistress Kim." "I love to be stripped in front of everyone, and it gets me so horny and wet." "I'm a perverted slut who wants to masturbate for everyone's pleasure, please make sure to make a video of me." And that paved the way for my third forfeit, to lie down and masturbate for everyone, and I did just that, lying down on the sand, I began to play with my breasts and pussy for everyone, who followed my advice and started photographing and videotaping me, dozens of phones and cameras caught my great orgasm, as I moaned loudly for everyone as I came. The fourth forfeit was for me to serve everyone any drinks or snacks they wanted to buy from the beach stands, Kim also made sure to tell everyone that they were welcome to grope and finger me as much as they wanted, something everyone seemed keen on doing, including the boy and girls who came with me, as they made sure to stop me halfway through the punishment just to give me another orgasm, something that made Kim punish me with another spanking once again, saying that I was dawdling in doing the forfeit. After a few hours (and several orgasms at the hands of strangers) Kim concluded that I have fulfilled the final forfeit, officially making me her slave, she took me to her home alongside our three friends, where they spent the day enjoying themselves, all while I did the chores completely naked, and occasionally was used as enjoyment by them. In the evening, our friends decided it was time to leave, I asked Kim how long would she keep me as a slave this time around, she said that she would keep me as long as she liked, I remembered that the day after tomorrow was a school day. I excitedly wondered if she would send me to school naked.