itch.io

As it says when you start the game, no stat is required to advance anyone's story. 

You must also actually do exhibitionism to increase exhibitionism as opposed to just clicking the button and eating together...

To put it simple if i remember correctly you need to get to a certain point in the story of maria to actually get the chance to upgrade exhibition in the main girls, o and a certain level with them of course, still i dont remember the exact moment

ty both,yeah i had to just play and once i focused more on one character those options and stats opened up.ty for responding