Part One: Something Naughty (Lisa focused, College Sex Route)

Lisa peered down at the notebook, pencil in hand. Of course, she could write something easy and simple, something that would let them test out whether it worked or not. Something like ''Twins get their coffee for free''. That's be easy enough to fact check. But that was also boring. She looked towards Diana, flickering her gaze over her older sister for a moment. She looked so serious, so busy. Lisa knew that she had been doing a lot lately, college had been catching up to them both, and Diana had always been the more studious one, who liked to devote herself totally to the work they were given. She gave herself no breaks, and expected nothing but the best from herself, no matter how tired she was, or how little time she had to work on the project.

She wondered what sort of rule she could make that might help out her older sibling a little bit. As has been already noted, Lisa and Diana were very close, and they knew each other very well, even to the point of sharing a lot of the same turn ons. Lisa cast her mind back, trying to envision what Diana had told her when they were younger. She remembered back when they had been sharing truths, during a game of some sort, and Diana - red faced and blushing - had admitted that she liked to watch a certain kind of porn. Later, that had been confirmed when Lisa had caught her at it. An embarrassing event for sure, but it had served to bring them closer in some ways.

Mind made up, Lisa delicately drew the pencil across the page.

''New Rule: Twins are able to get anything free from a coffee shop, but they must not be wearing underwear.''

It was rather silly, as such things went, but she figured it would make a fun way to test the book, and to be honest, she didn't really expect it to work. So imagine her surprise when, a moment later, both of the girls felt their underwear vanish. It was a single, instant thing, there one moment and gone the next. No shrinking, or fading, or anything like that. Just a sudden blatant change. Diana jumped as she felt it, but not as much as Lisa who had been wearing a skirt. Suddenly, she realised what she had done as she felt her mound exposed to the cold air. A tingling sensation swept through her body, part excitement, part shock.

"Lisa!" Diana hissed. "What the hell just happened?"

"Um..." the younger twin shot her older sibling a shy smile. "I may have tested it slightly...?"

"By removing my underwear?"

"Mine too, if it helps?" Lisa said meekly. "And any other twins probably..."

"Not helping!" Diana fumed.

"Well, at least we know it works..." Lisa crossed her legs slightly under her chair, leaning forwards a little as she felt her nipples rubbing against the fabric of her blouse. "It seems impossible but..."

"It works..." Diana said, her earlier shock fading into wonder as she gazed at the book. "Do you know what this means?"

"We have the power to change the world?" Lisa suggested. "So, what should we use it for? Casual sexual gratification?"

Diana shot her a look.

"What? What? I just had a feeling that was sort of expected for some reason."

Diana sighed, pushing her fingers through her long hair as she considered.;

"Nothing yet." She said. "We need to think about what we're going to do with it. Put it in your bag quickly, before anyone else realises."