If you are even tangentially in the Harry Potter fanfiction space, you have heard the whisper: Manacled . Written by SenLinYu, this Dramione (Draco x Hermione) epic has transcended typical fanfic status to become a literary phenomenon, often cited as one of the darkest and most beautifully devastating stories ever written in the fandom.
"Quick setup: Voldemort won. The Order is decimated. Hermione is found in a cell with no memory of the last several years. She is given to Draco Malfoy—who is now the terrifying High Reeve—as a healer. He treats her like a prisoner. She thinks he is a monster. But... there is a reason he is keeping her alive." manacled book
"This is not a beach read. The content warnings include: graphic rape (off screen but referenced), torture, suicide, and extreme violence. If you need a HEA (Happily Ever After) that is neat and tidy, skip this. The ending is happy, but it costs a pound of flesh to get there." If you are even tangentially in the Harry
"Let’s talk about this version of Draco. He isn't suave. He isn't a secret prince. He is a war criminal with nerve damage, a limp, and the emotional availability of a brick wall. And yet... the devotion he shows in the second half of the book is the most romantic thing I have ever read. The bar is in hell, but he digs a tunnel lower before climbing up." The Order is decimated