I'm not aware of its popularity. There are countless fanfictions out there, and without specific data on views, reviews, or community discussions, it's hard to say if it's popular.
Since it's a fanfiction, the context could vary greatly. Maybe in the story, Fleur restrains Hermione to the bed as part of a rescue mission gone wrong. They might be in a dangerous situation where Fleur thinks restraining Hermione is for her own safety, like if they are in a place full of dark magic and Fleur doesn't want Hermione to accidentally trigger something. However, without reading the fanfiction, it's all speculation.
She would probably be very angry. Hermione is known for her strong will and intelligence. Being restrained against her will would likely make her furious and she'd start shouting at Fleur, demanding an explanation.
I'm not aware of such a specific fanfiction. Fanfiction can cover a wide range of themes and scenarios, but this one seems rather unusual and perhaps not in line with the general spirit of the original works. However, the world of fanfiction is vast, and there could potentially be something out there that I haven't come across.
She might have been shocked. Hermione is usually a composed character, but such an unexpected physical action from Fleur could have caught her off - guard, leaving her momentarily stunned.
It could be a case of miscommunication. Fleur misinterprets something Hermione said or did, and in a fit of rage or confusion, she ties Hermione to the bed. As the story progresses, they clear up the misunderstanding and end up becoming friends or allies.
One possibility could be a situation where Fleur is under the influence of a dark spell. Maybe she's been hexed to do this to Hermione. In the fanfiction world, this could be a lead - up to a rescue mission by Harry and Ron. They would have to figure out how to break the spell on Fleur and free Hermione.
Maybe Fleur was just being playful. In some fanfictions, characters might have these sorts of physical interactions as a form of friendly teasing or a quick, impulsive action without any real harm intended.
One possible plot could be that there is some sort of misunderstanding. Fleur believes Hermione is in danger from some dark magic or a dangerous creature and ties her to the bed to keep her safe. As the story unfolds, they realize the miscommunication and work together to solve the real issue at hand. However, this is a rather strange starting point for a plot and would need a lot of careful development to make it a believable and engaging fanfiction.
In fanfiction, the writers often like to play with characters' emotions. Hermione might be possessive of Fleur because she feels a sense of competition. Fleur is known for her beauty and charm, and Hermione, being a strong - willed character, doesn't want to be overshadowed by her. This possessiveness could be a form of self - preservation in the fictional world they exist in.