There's definitely a suspense of disbelief in enjoying this as fiction and vicariously eating up the obsessed love of someone.
But legitimately this IS just sexual assault from a woman, and I DID feel more uncomfortable than attracted! Even though she's breaching his boundaries, when he stops her, she plays the card of saying "it hurts" like she isn't the one doing something wrong. She's acts as if he wants it anyways. And treats his boundaries more like a goal to achieve than something to respect. Is it just abuse! Which really makes it feel different than most yandere stories to me...
This is very intentionally dressed so that it's a pretty big booba anime girl doing this, and that's the litmus test!