Fred and George.

Jessica was an ordinary girl from Hogwarts, a Gryffindor. She was an average student, but she wasn't a slacker either, got along well with everyone, and the teachers respected her, and she generally respected them. But there was one catch, and that catch was Fred and George. They'd been teasing her since their first year, but never overdoing it. They were a cut above her, but also older. They were eighteen (yes, not legally), and Jessica was seventeen. She was beautiful and well-groomed, didn't cling to boys, didn't steal them, and was friends with girls. She had long, luxurious, fiery red hair, a good figure, and long legs. She wasn't particularly striking, but she was just as attractive, with soft features and soft skin. She also got along well with Molly, Ginny, and everyone else from the Weasley family who attended Hogwarts, but Fred and George were the big exception.

One day, it was dark and raining outside, though it was nice and warm. Jessica, carrying a large black umbrella, was walking closer to home with her friends: Ginny, Hermione, and Luna. They were chatting about their nonsense when suddenly the twins jumped out, wet as puppies. Fred had a suspiciously calm expression, and George had a bright pink potion bottle that didn't exactly convey anything pleasant. The girls continued walking with their Hogwarts bags, oblivious to the two rascals.