Not much of a story, but well
If the thought of a spell makes me giggle for more than 15 seconds, I am to assume I am not allowed to do it
Parvati giggled.
Since giggling seemed to be her default state, no one in the common room paid her much attention for it, with the only exception of Lavender, who leaned closer. "What?" She had just been busy with her DADA homework, and thought Parvati was, too, so to her the giggle came as quite a surprise.
Parvati pressed a hand against her lips in a vain attempt to stifle her laughter and pointed to the book that had been distracting her from homework for the better part of the last half hour. Its ominous title was: "All Is Fair – Spells and Potions for Your Success in Love". Parvati had ordered it via mail and received it just yesterday afternoon.
Lavender curiously leaned closer and, reading the page, broke into giggles as well. The page held a detailed description of how to make someone fall for the person they disliked most. The spell would wear off after a couple of hours, it said, but until then…
The eyes of the girls met. Parvati's were watering by now. "Filch," they said as one, and laughed so hard that some heads finally did turn to them.