Yo, don't worry, you have option to comment then do so, I'm here to address them
If by "kaede study" you mean the small ever where she and Yuna are together and they ask about reading Karamazov brothers - then no, it's just a way of either reducing or increasing stats/relationship
This could be some sort of placeholder for a rework, just as TV watching scene has just been updated, both in visuals and sex was added, where previously there was none
Gallery is more of a place to store any "naughty" events where sex is done or implied