This is an idea I had for a while. 440
The mermaids booked an escape room. Right now, they were waiting for the previous group to finish. While they were waiting, all of them got up to use the restroom. All except Rina, who didn't feel the need at all. She didn't think she had to go until it was too late. The moment the girls entered the escape room and the door was shut, Rina felt a slight twinge. She didn't realize what it was until Lucia talked about a pee bucket for Seira. The need felt stronger, as if she didn't tinkle in a while. "I missed out all the indications of my need. I'm such an idiot" she thought, "How long did I hold it in for?" She tried to tell everyone about how she needed to pee, but just couldn't. "Rina, what's wrong?" said Karen. "I forgot to prepare my body" Rina quietly said, indicating her situation in a roundabout way. "What are you talking about?" said Karen. Hanon, making a wild, but extremely convenient guess, said, "I think she's thirsty" "No, not at all!" said Rina, "Quite the opposite..." Noel thought abut it. "So instead of wanting water into your body, you want water out of your body" she said. Rina nodded. "A lot of it actually" "And you didn't go before we entered this room?" asked Lucia, "Jeez, you're so stupid" "I guess the best course of action is to wait it out and not make her think about it" said Coco. So they got back to solving the escape room. Rina, although fidgeting like crazy, helped a bit. It wasn't even an hour in when Rina knew she had to relieve herself sooner rather than later. Knowing that it was a two hour escape room didn't help at all. "What if I wet myself?" she said. "You'll be fine" assured Noel. "I may not look like it, but I don't have a decently-sized bladder" said Rina, "Not enough to hold another hour's worth of pee pee. In fact, it's not big enough to hold another minute's worth" Seira gave her the pee bucket. "I have to go too a bit, but not right now" she said, "You need it more than me" Rina blushed. "I can't go in that!" she said. "Rina, you're gonna go anyways. At least make it decent" said Karen. Rina reluctantly accepts. She took off her panties and sat on the bucket. She signals the others to turn away and tries her hardest to pee. After five seconds, she felt the stream coming out. She wasn't sure if it was voluntary or not but it felt good for her.