New storyline for Beth, 3 more girls at the fantasy restaurant, Shadow curios shop lady has new images I think, her assistant has new images too. There are a few more things too.
Explore the city, Park and mall. When you explore those areas you will find different girls to be servants for the restaurant. It just came out very recently.
Also, is there anything else to Olivia's story after you find her stuck at the movie theatre? I find it weird that she's the only worker I haven't been able to feed the sandwich to.
You can feed Olivia the sandwich. No idea how many girls there are. I didn't count. All I know is whenever you hear a bell ring when you encounter 1 in public that girl can be a waitress. 15 girls total. It will go down to 14 because one of the girls leaves later on.