My next story is about a girl I went to college with, we'll call her Kim. She and I both did theater tech and had the same major, so we wound up spending a lot of time together even though she was a year younger than me. She could best be described as a buttcrack girl, I swear her ass was always out no matter the situation. This story is about the one time I saw her thong slip, though.
Kim had a pretty average build, overall. She was about 5'4", maybe 140 lbs, with dirty blonde hair, a tramp stamp, and glasses. She was in a sorority and partied a lot, even though she was only 18 when I met her.
She always wore these super tight, distressed stretchy low rise jeans with tight cami tops or short t-shirts. The jeans clearly didn't fit her well and would show a sliver of buttcrack even when she was standing. When she sat down she always showed an inch or two. I think she probably gained weight during her freshman year which caused all of her clothes to be too small, but that's just my guess.
She had a really great ass and I thought she was super hot. I loved sitting behind her in classes and watching her try to pull her pants up, fail to cover her ass, and then sit down anyway. She'd then spend the entire lecture inadvertently flashing me and everyone sitting behind her.
I never saw her panties, and for a while I just assumed she went commando every day. Anyway, on to the story.
One night the two of us were working in the theater together setting up lights and speakers for an upcoming show. There was a whole team working and we were tasked with running cables and making sure they were properly hooked up.
I was excited to work with Kim on this because of how much moving around and bending over we'd have to do. The cables were also quite heavy and required two hands to carry around. This meant she wouldn't get a lot of opportunities to pull her pants up.
Just walking around holding the cables I noticed Kim's pants were barely staying on. She was showing an inch of crack just walking across the stage and couldn't do anything about it. She didn't seem to notice and even if she did, she didn't seem to care.
After we ran the first set of cables we had to plug them into a big power adapter on the floor. All the cables had to be plugged into the back of the adapter which, luckily for me, was pushed right up against the wall and was too heavy to rotate. This meant we would have to crouch down to plug them in.
Kim dropped her cables on the ground and bent way over without pulling her pants up. I was immediately treated to a view of her tramp stamp and two inches of crack spilling out the top of her tight jeans. She leaned over the back of the adapter and tried to plug the cables in but couldn't quite reach far enough.
In order to get enough leverage to plug in the cables she had to get down on her hands and knees. The second she did this another inch of buttcrack popped out as well as a small purple g-string. The thong wasn't sitting where it was supposed to and looked like it had gotten pulled down to about halfway down her ass by her tight jeans.
These are not my photos, but this is basically the view I was getting:
I think she could tell she was flashing more than usual so she reached back to feel how much was out. Her hand brushed over her crack and thong and she made a half-hearted attempt to pull up her pants by grabbing one of the belt loops and tugging. This accomplished absolutely nothing from her squatting position and she eventually gave up and went back to trying to plug in the cables.
She asked me if I could grab a flashlight and I happily obliged. I leaned over her and shined a light on the back of the power adapter, giving me a perfect bird's eye view of her buttcrack and whaletail. Eventually we got the cables hooked up and she was able to stand and adjust herself, though her crack was, as always, not quite covered up.
This went on for several more hours and there wasn't a moment where Kim's butt and/or thong wasn't showing in some capacity. I was so turned on and trying to keep my cool and not be too obvious with my staring.
At the end of the night the entire team was sitting and chatting on the floor and Kim and I went over to join them. I think at this point she had given up on keeping her pants up and sat down without trying to pull them up at all. She crossed her legs and leaned forward to join in the conversation and must have been showing half of her ass and two inches of her thong. Other people definitely noticed but nobody said anything.
I saw Kim flash her asscrack countless times after this, though she never had another thong slip. This was definitely my favorite memory of her, and one of my favorite flashes overall. Kim was such a perfect buttcrack girl, they just don't make 'em like they used to!