Hello. Thank you for your comment. Also, thanks for reaching out. All of the items in the gallery should be unlockable. Some of them are just variations of the same scenes with the different MCs. If you're stuck, let me know which ones so I could check if there's something wrong with the triggers. Although I did make a simple pass at them to check if they work, it's still possible that there might be a unexpected interaction that would prevent their unlock. (A future update will have an option to show tips/hints on the choices to give a clue on what they give you.)