AintAFool

Four girls are given special collars and Polyjuice potions that turn them into pleasure elves. A hybrid of witch and elf. The only way to remove their collars and return back to normal is accumulate enough "sexual points" with their trainers. And their trainers, four of their male classmates of opposite houses. They are assigned to train the pleasure elves during winter break, and don't know the elves are really their friends.

Hermione had always been a nosy girl. That get's her into some trouble with Draco and his Slytherin peers.

Based on Akabur's Witch Trainer game, Hermione is tasked with spending the whole day with cum on her face.