Great game! Only discovered is a couple of week ago but been playing it quite a lot since. The Wiki is excellent as well. There's been a few error messages pop up but Ignore jumps past them OK (might be Mod related, not sure).
So far I've had two achievements/scenes that were troublesome (i.e the Wiki didn't help). I couldn't get either of the Holy skills or related conversations with Lilian until I removed the Mods. Not sure which Mod was breaking this, but once I'd progressed past this I could put the mods back in the correct folder.
The one scene I can't access is Vivian's Ass Training. Even with mods disabled, a level of Ass Fetish and most other content complete. I leave my room at night and can't seem to access it.
Any ideas how I can trigger the Ass Training Scene with Vivian?