The only part I remembered about that post and the Suni route was:
I'll go try it now, since I have a save at the final scene for each girl and a few fails. But remember that it really was broken when you posted that, and you hadn't given us the mod fix yet.
Edit:Nope. Still not fixed with the mod you gave us.
Must need a different mod I don't have. And as I also said, it isn't in the "Lain's Scene Gallery" either. Suni only has two files in that.
In the 'walkthrough tab', my Suni route is stuck at 9/15 no matter how often I sleep with her.
Edit: I went back through Suni's story and tried other chat options but I wasn't able to pass the 9 from completing her story arc. I think the 15 is actually 'all' of her story paths which wouldn't be possible because she or you die in two of them. Unless there is more to her story I don't know about? Here's my goddess day walkthrough page after fully completing Suni's path and then sleeping with her 21 more times:
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