Other than this one we're discussing, I've never encountered another bug in this game personally.
That's not to say there aren't some quirky game elements though that could do with some finesse.... An example is when you're on the Carol love route and stumble upon the massage scene with her. It requires you to obtain the massage oil to see it in its entirety but the window to grab it is needlessly unforgiving. I think the same goes for when you need to get her keys to gain access to the basement.
Many of the games lewd elements are locked behind this pseudo wall and I've seen many times where people are entirely unaware of certain scenes existing because they didn't hit the timings just right. Too many individuals don't know about the (spoiler for Carol) bathroom sex scene, for example. But that's more path based than timing. Same goes for the Christmas special mini game; there are four gifts to find, not three.
So while it's clear the dev has designed this game to not be just a mindless adventure, there are too many players that are either unaware or unwilling to jump through all the necessary hoops for the content they're looking for.
