Can you tell me why with Sash I can't get past 20% love and go on a date with her? Gifts she does not accept and, even if accepted, it is not more than 20%. What needs to be done with her for this to move forward?
if you already did the one to help her unpack, to continue after the next "block" is to meet her at the mall, I don't know when she comes out there, you have to wait for her to come out of work at the mall entrance several times she doesn't appear, you have to wait for her to appear there if she doesn't appear, continue the next day until she appears there, if she shows up interact with her and you will have a hang out event,
and after that you can go out on dates with her, every time you can no longer continue raising her points check the mission log (The book, the "story tracker") there tells you what you have to do next, as several times you have to do these events to continue.