No, she'd rather explore alone

Sarah quickly decided that asking Lucy for help was too embarrassing for her liking. Surely finding a chastity cage in her size on her own couldn't be that hard, right? But where to even start looking?

With slow steps Sarah started wandering through the store, admiring rows and rows of shelves with all kinds of interesting and curious items in them. Some she easily recognized, there was a lot of lingerie and she had seen a paddle before. But then there were some more obscure gadgets lined up towards the back of the shop as well. Some of them looked downright cruel, like a variety of black, red or pink "****" devices, used for more.... unconventional stimulation. And lastly some items looked so strange, that Sarah couldn't imagine a use for them. Maybe she'd ask about them if she came back another time. Looking over all these toys had reminded Sarah of how horny she was. With every step she could feel her heavy balls rub against the fabric of her panties.

For now however she should focus on the task at hand. Sarah had finally identified the right section of the store for "cock related" toys. But while looking for a cage in her size, something else drew her attention. An unusually thick cockring was hanging from one of the shelves. There was no price tag attached and checking the rest of the row suggested that this was the only device of its kind left. Did the others sell out quickly? Few other items seemed to be in low supply in this store. Sarah was planning to try on multiple cages anyways, so she decided to take the intriguing ring as well. Making her way to the changing rooms, she saw Lucy wandering around the store looking for customers to help, but the assistant only acknowledged Sarah with a smile and a nod before walking past.

In the changing room Sarah could feel her heart pounding. While she had tried rings and even ropes before, it had always been alone in her bedroom and never with one of her past partners or for long periods of time. The thought of trying on these cages and then wearing one in public aroused her more than she had first expected. First she needed to undress however. Making sure the door to the changing room was locked, she slowly took of her skirt and then pulled down her bulging panties. The room was surprisingly large, compared to those in most clothing stores, probably to accommodate couples who wanted to try on underwear together and whatnot. There were multiples mirrors attached to the walls, and one smaller mirror on a little table, which itself was standing in front of a leather couch on the right side of the room. Signs of previous customers could still be seen on the leather, white stains marked most visible parts of the piece of furniture.

Thinking about other customers ejaculating in the exact spot that Sarah was sitting now was not exactly beneficial for her level of arousal. She had to be soft to try on the cages, but from the moment she undressed, her cock had decided to get as hard as possible and she was already leaking a bit of precum onto the floor below her. 'Well done Sarah, this is going to take a while', she thought to herself while trying to focus on something else. She had taken 3 different cages with her. The back of the boxes provided size ranges, but Sarah didn't know how long or thick her cock was. She had last measured it maybe a year ago, so she would simply have to try them on and decide based on how tight the felt. If only her dick wasn't aching so much right now. Sarah had often heard that focusing on mundane parts of her day or upcoming responsibilities would help get soft in difficult situations, but no matter how hard she tried to redirect her thoughts, nothing happened. The image of the cute assistant that greeted her earlier flashed through her mind and a big drop of precum emerged from her urethra, ran down her lengthy shaft and balls, then landed on the sofa below her. 'Fuck.'

It was getting warm in the changing room. Gazing over the cages she had yet to try on, Sarah remembered the other devices she had brought. 'Might as well try that one on first.' The cockring was able to be stretched wide enough to fit over her massive erection and soon Sarah had positioned it snug at the base of her throbbing monster. Once the ring was in place, Sarah noticed a little button on its side, that she hadn't seen before now. Without thinking about it, she pressed the button and immediately regretted her decision. The thick ring started vibrating. It felt like multiple hands were all rubbing the base of her cock at once. Sarah gasped and her cock twitched, covering the table in front of her in precum. With every second the vibrations seemed to get more intense. Sarah could feel her orgasm approach rapidly. She only wanted to try the damn thing on, not shoot her load right there! Sarah was quickly reminded of her recent days of edging and the intense pressure that had built up in her balls. Either she'd stop the vibration now or she would the load that she had been edging so hard for in this stupid changing room.

With one hand Sarah tried to keep her cock from twitching back and forth, while trying to find the button with the other. There it was! She pressed it down, just like before. A few seconds went by, but nothing happened. The ring continued to **** the base of her sensitive erection. More and more precum came flowing out of her slit and down her shaft, forming a little puddle on the couch. Sarah couldn't suppress her arousal anymore. Her surprised gasping turned into a moaning and whimpering, as she was getting closer and closer to the edge. Then she remembered one last option. She would just try sliding the ring off! But would it fit over her swollen cockhead?

Sarah grabbed the ring with both hands, nudging it upwards, the vibrations continuing to shake her cock. She pulled the device upwards with all the strength she could muster, but it just wouldn't move. This was it. She was going to cum. She could feel her balls tighten and her cockhead swelling in preparation for the first shot. But then- nothing happened.

The vibrations continued and her balls started pumping, but no cum left her sensitive tip. Her whimpering and moaning now turned into screams of pain and pleasure, all at the same time. The cockring was so tight that it blocked her urethra and didn't let any cum through! Sarah could feel her balls pump and pump and slowly swell up as all the pressure met resistance, and all of her seed was **** to stay in her sack. Sarah thought she was done for. Her cock turning red, then purple, balls swelling to almost double their size, it was ****. Sarah was sweating and breathing heavily. She wasn't even sitting on the couch anymore, instead lying down on it with her cock sticking upwards, the brutal stimulation had almost completely broken her. The pain didn't seem to ever stop, the vibrations became stronger and stronger, her balls would burst any second now, Sarah thought. Her screams must be audible even in the adjacent rooms by now, despite the soundproofing.

With a quiet click, the door to the changing room was unlocked from the outside. In the corner of her eye, Sarah could see the assistant from earlier looking into the room. "Oh, you're having fun? Don't worry, the ring isn't dangerous" she chuckled. "Please be a bit more quiet though, ok?" Suddenly she seemed to notice Sarah's defeated look and the tears streaming down her face. Lucy walked towards the screaming futa-girl. She reached around the monster of a cock that was twitching in front of her face, and held down the button on the ring. From one second to the next, all the vibrations stopped and the ring relaxed it's grip.

Sarah felt as if time stood still. She didn't even hear the little beep, emitting from the **** device. In a single moment, all of the built up cum in her balls rushed to the tip of her purple, veiny cock. Lucy had already taken a few steps back in anticipation, as a massive amount of semen started spraying from the girls dick, covering the wall behind her and the whole couch in white. Lucy smiled. "Quite impressive. Should've read the manual though." Sarah's entire body was shaking. Her orgasm seemed to have last close to 30 seconds, but even now, cum was still dribbling out her tip. She took a quick glance at her savior, who just stood in the corner and smiled. Then everything around her went dark.

Sarah was woken up by a warm stream of water running down her head. "I hope you don't mind showering in front of an employee." Sarah blinked to clear the water from her eyes. She was lying in a small shower room, the store assistant Lucy standing in front of her, with a showerhead in her hand. "I thought you'd might like to use the store's shower, after your 'experience' back there." "t-thanks" was all that Sarah could stutter. "Your clothes are all clean surprisingly, let me just get them real quick." Lucy left the girl alone. Sarah got up, quickly washed down the rest of her body and turned off the shower. Only now did she suddenly feel a wave of embarrassment hit her, as she thought about what had just happened. Lucy burst into the room again. "Here's your stuff! Have you decided if you are going to purchase the ring yet? It's the last one we have, so today might be your only chance!"

Back outside on the street Sarah pondered the events she had just witnessed. To her surprise she felt completely fine, despite all the pain she felt from the ring. Lucy had assured her that the ring couldn't cause any permanent damage to her testicles, as it was smart enough to automatically regulate the tightness and vibration intensity. In any case, Sarah was looking forward to visiting the little store again soon. She looked down at the shopping bag in her hand and smiled. Until then however, she'd have this souvenir to keep her company.