Since her encounter with Hermione and the Gryffindor's little "problem", the Ravenclaw's ever-curious mind had been preoccupied with the entire concept of the ability of having well, a certain addition down there. As Hermione continued to experiment with it (with Luna's "help" of course), Luna had begun to wonder what it would be like to have one herself. Not forever mind you, she liked her own workings down there too much. But she was curious as to the experience.
So, after practically begging Hermione, the bright Gryffindor had come up with the means for Luna to have her own "little friend", at least temporarily. She had taken the potion that morning and so far she had enjoyed it well enough, though it did take a bit of getting used to to control it from springing up whenever a cute girl walked by.
Now, she walked with a slight bounce in her step with her slightly askew Ravenclaw uniform and hair done half up and her wand behind her ear. A side effect of her temporary addition was a definite increase in randiness, which was why she was now on her way to look for Hermione for some release. And if not her, than perhaps an empty bathroom where she could take matters into her own hands...
She was stopped though, by a rather beautiful girl with a cute accent. Immediately, Luna felt a rush straight to her groin. "Hello." Luna gave her usual airy smile, though her cheeks were tinged the slightest amount of red. "Oh, you must be Professor Delacour's little sister!" her smile grew, as did the addition between her legs. "I thought you went to school in France. Well, anyways, I'm Luna Lovegood." she greeted, holding out her hand. "It's lovely to meet you."