This one's in third-person, which makes it an oddball, probably because I wrote it before I really decided to turn my stories into a connected series.
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After three years, Ashima thought she knew the Nokushima twins pretty well. One of them had been her college roommate for three years now, and she'd heard enough stories from that one all about the other to feel almost like she'd made two fast friends instead of one. They were one of those twin pairs with charmingly divergent personalities that still managed to get along as if they had alot more in common than they actually did. While neither one was a dimwit by any stretch of the imagination, Ashima's dormmate Kara was the more outwardly intellectual. Her fashion sense was very practical, usually consisting of blue jeans, a white or pastel-colored peasant top, and an open flannel shirt, though in warmer months the jeans would often become denim shorts and the flannel shirt would be abandoned. Kumiko, on the other hand, was much more of a sporty type, often seen in leggings and tank tops hugging her athletic form. Neither of them, however, had any difficulty attracting male attention. Although they were both a bit short overall, their proportions were enviable. Kara was a bit more unassuming about it, despite the fact that their identicality included their well-formed butts and peasant tops do no better than tank tops at obscuring the shape of the twins' equally attractive breasts.
Now, however, Ashima found herself seated next to their three-years-older older sister Hatsu, whom she had just met that day as she, the twins, and two of their closest friends from the dorm next to theirs, Fiona and Theresa, climbed into Hatsu's forest-green van for the long trip back to campus after Thanksgiving break. Fiona and Theresa were both dusty blonde, the latter sporting a pair of glasses but otherwise matching Fiona in her semi-hipster fashion sense. Neither one had any family within easy traveling distance or enough money for airfare, so both had gratefully accepted the Nokushima family's offer to join them for the holiday. Mr. and Mrs. Nokushima had come to treat Ashima almost as one of their own. Even the blonde newcomers could tell that their regret was sincere when work prevented them from being the ones to drive them back to school.
Hatsu was the one whom Ashima knew the least, but she would soon get much more than she bargained for. It was a seven-hour trip, so the girls had been sure to make plenty of refreshments available. Unfortunately, Hatsu took a different route to the university than Ashima was used to, so her expectations of where all the nearby rest stops would be along the way were shattered. By the time she'd realized that she couldn't time her consumption of food and drink carefully so that her urinary needs always arose within reasonable range of a restroom, it was too late. Her bladder twinged, gently at first, but the urge was quickly escalating.
"Hey, can we stop at the next gas station or something? I gotta pee," she'd said.
Hatsu had promised to be on the lookout but warned regretfully that it would probably be quite a while. Ashima smiled and thanked her, but a half an hour later, she was getting really desperate, with no bathroom in sight. They were on a long rural stretch between urban oases, but oddly enough, there were plenty of other vehicles around them on an otherwise empty landscape. Ashima speculated that, given the time of year, they weren't the only college students returning to campus.
Meanwhile, Kara watched from behind her sister as her friend massaged her crotch and rocked her torso back and forth, occasionally hissing or moaning softly. She looked up into the rearview mirror, caught Hatsu's eye, and nodded in Ashima's direction, a wordless conversation passing between sisters.
"Look, Ashima," Hatsu began, "I'm sorry for not saying anything before, but we just met, and I didn't want to weird you out. But you're clearly miserable, and I'm not sure when the next stop will be." She sent Ashima a sympathetic smile at the involuntary groan that such news elicited. "If you have to pee, I don't mind at all if you just go here on the seat."
"Please, don't tease me," Ashima chortled.
"I'm serious," Hatsu insisted. "A couple of years ago, I was late for an important interview for a fellowship that I really wanted, so I left the house without my morning pee. That turned out to be a big mistake, because by the time I got there, I could hardly hold it in. I just barely arrived in time, but I realized there was no way I'd make it across the parking lot without wetting myself. So I took a gamble, yanked my pants down, and just peed right there on my seat. It was scary, but somehow exhilarating at the same time, and it felt so good!" She half-moaned the last part in reminiscence. "After the interview, I went on the Internet and found the best cleaning solution I could find, 'cause I wanted to be darn sure it got cleaned up. And the stuff turned out to work like a charm! It only takes a couple of minutes to use, and it does a downright miraculous job of not leaving a trace, even after the seat seems to have dried! I still have a bottle in the glove compartment."