So disclaimer before we get into it. Tulgeyman was kind enough to let me borrow this idea for my own request thread.
Once they were best friends. They knew each other all their lives, were seen as inseparable. That is, until he got popular and she didn't. Things changed for the worse. The guy she once counted on became her tormentor. She had always been shy, a little awkward, and he knew where to push to make it hurt. Yet she never could fully bring herself to hate him, never could let go of the hope that the guy she had secretly crushed on for years was still in there. She didn't think it could get any worse. She was wrong. What he did to her when they were alone was worse. It was scary, it hurt. She couldn't stop thinking about it. Stop crying. Stop the places her hands went... she didn't know why she kept finding reasons to be alone with him, be vulnerable around him, be a victim, a thing to be used. Maybe, if she couldn't have him the way she wanted, she could have him this way...
I'm looking for this to start with her still hopelessly pining after him. Still wanting to go out with him even as he's snubbed her and pushed herw away as he's become more popular. But then, for reasons that can be discussed, he decides to see just what he can make her do. I see things starting small, perhaps masturbating in front of him or giving him a hand job and slowly progressing. I don't see anything being all out non-con, but it will get dub-con because even though she doesn't want to do it, she'll do it for him. Gradually I see the acts becoming darker and more perverse as he pushes the limits of what she'll let him do.
In terms of where their relationship ends up, I see her love potentially getting spoiled and turned to hatred as he becomes increasingly cruel, ruining her to the point where he's the only one she can have. So even though she wants to get away from him. Wants to cut him from her life like she should have the moment he began to change, she can't anymore. He's the only one who can give her what she needs now.
I think it would be interesting to find a way to play this out over a span of years even if it means a series of roleplays with the same two characters because I'd love to see how things progress from high school to college to then adults potentially attempting to make their own lives separate from each other only to find the poisonous relationship they've built together only causes them to damage those they try to get to close to.
Possible Kinks:
Just about anything goes here.