This kind of fanfiction concept is unacceptable. It goes against the values and nature of the original work and is not something that should be explored or entertained.
There's also 'Headship Bonds'. This fanfiction takes an interesting approach where Hermione and Draco have to work together to solve a mystery that's plaguing Hogwarts. As they are the Head Girl and Head Boy, they have certain responsibilities. The story is full of twists and turns, and their relationship develops in a very believable way throughout the story.