Can anyone pls recommend me any manga/manhwa like this? Thanks in advance!

poor guy. I would never like to have such experience. If this guy is still not out of his mind I would be shocked

wait no not that. god. No there's no such book that I have heard of. It's the only one I guess. There's some where they goes into a movie but they aren't actually acting. It's kind of like went into a novel or manga.