I've been reading a lot of isekai recently and I thought of a story line that could be really cool.

The FL would be a reader who was crushing on the ML. It would start off normal but in the comment section of each episode there would be some unhinged comments from a guy in love with the FL. The story slowly begins to get darker as a villain ends up messing with her and the ML trying to break them up. It takes a while for the reveal but the villain reveals he's after her and will stop at nothing to get her to himself. The FL is panicking because what she thought she remembered from reading is no where near what's happening. The big reveal would be the commenter that has commented on every episode was the one reincarnated as the villain and that he was rewriting the story from within.

I'd write it but I don't have the resources to find an artist or a team and my art skills would never be able to capture my vision.