Are there games in the list that start as netorare, but there are options and routes to change it to netorase instead?
Not actually sure it's on the list (it's not easy to search) but I do know of a VN that matches that one, specifically
'Please Bang My Wife" (
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and its sequel '
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'). It's linear, so doesn't actually have your desired 'options and routes to change it', but it does actually change to NTS. Basically, she's cheated on him, but when he finds out he actually finds it stupid hot and actually asks her to continue, and then from then on the wife is all for teasing him and such. (It veers into humiliation, but not insanely so) There is a sequel that is better, and it takes place 5 years later. Both of them have very good NTS endings (with their marriage strong).
So I guess in a way, their marriage was saved by NTS? (Don't get me wrong, I don't actually like the VN(s) too much because it absolutely does start NTR, but that is the only thing that comes to mind when you asked. I prefer wholesome NTS that has nothing to do with NTR.)
While it's stupidly common for NTS to turn into shitty NTR, it's really rare for the reverse to happen. Most of the time it's basically just humiliation and cuck behavior that try to 'excuse' the wife being just a cheater. Someone on this thread (or the other master NTS thread) once put it like this: It's like waking up in the middle of the night having some robbers break in and steal your TV and furniture, and the you go 'no it's ok, I'm actually lending it to them'. Yeah no you're not lol. Just because you say after the fact doesn't change the fact that it was stolen against your will without your knowledge in the first place. By the same token, it's not really NTS if you didn't initiate the lending, and it's done without your permission or desire - that's still called NTR.
That's what makes the second game a fresh breath of air. She hasn't cheated in 5 years, their marriage is strong, and then they want to get back into it. It's definitely NTS at that point.