You need to finish the quests with all the girls first. Also, there's a walkthrough in the folder with the game.
I may be confused because it's been a while since I played, but the last content I stopped was having photographed Mako and The Thing, but it seems that there is still content that I haven't seen, but according to the notes, I need to deactivate the filter to continue the rest of Connie, Rachel and Princess content, how do I do that without resetting everything Futabox?