Hey givehimchance!
A vast majority of the scenes are easy to unlock, so if you're playing normally However, there are a few that are missable scenes, that would require a reload if you have the save(s) or restarting and getting back to certain points.
For Misc, there is 4 missable scenes. If you'd like, I can mention what they are!
The first 3 scenes in the Misc tab are all at the start of the game. (If you're beyond the start, you'll need to make a new save and get them).
Second row - The second and third scene are from the same part. When you get a dream about a pool and 2 girls, save it here (as you have a choice to pick either one).
Those are the only missable scenes for the Misc tab.
