Buy the original: dlsite.com/books/work/=/product_id/BJ430739
Follow/support the artist: pixiv.net/users/387769 x.com/seres_ryu seres37.fanbox.cc/
It gets the job done as porn, but this specific brand of defeated heroine story always feels like it's missing a plotpoint. She comes to like the pleasure and the villains only ever threaten to give her more yet she tells them what she wants despite already getting what she wants by not talking.
It's called a "drawl" and you'll occasionally see anime characters speak with it, though I'm not knowledgeable enough on Japan to say where or how much you'll see it irl. But in English it's a staple of the American Southern accent.