Hermione

Thinking for a moment, Harry can't help but let his perverted thoughts slide to his attractive, busty, best female friend. She's really filled out lately, her breasts pushing against her undershirt and her rear filling out in an arousing way. She's filled his thoughts a lot when he's been stroking his little dick behind his closed curtains and he can't resist the temptation. Quickly springing up, Harry digs through his chest to find both a vial of the potion and a bag containing many locks of her bushy hair.

Muttering a quick thanks to the house elves for at least labelling hers, the Boy who lived pulled out a few strands and let them sink into the vial, tapping his foot impatiently as he waited for it to change colour, his small dick already getting hard at the plans filling his head. He ponder whether or not to take it in the dorm and potentially get walked in on or go outside and find a private place before he drink it.