There is a bit of a grind, but it's not like BB. In BB, you had all those scenes where you had a low chance of success until you built up a lot of persuasion skills, etc. Remember how you had to play for days before getting "lucky" just for Alice to let you rub her feet? There isn't anything like that.
It's repetitive at first in that you get up every day and go to class and talk with the students, then come home and talk with Julia, but each day there are new dialogues. And remember how in BB when you opened the door when Lisa was changing she would say the same thing each time? In this game when you spy on Julia in the shower or when she catches you watching porn, the dialogues change and develop for awhile before they repeat. Eventually your day will be going to class, then going to work as a maid, then going to the cafe to learn more about Lisa, then going home, but again, each day is a bit different until the main storyline with the principal is finished in this version.
It does look like there will be lots of stuff to buy in the future, plus homework to do and probably Kate will need to get fit in the gym, so eventually it could be more of a grind in that you'll have to repeat a lot of tasks over and over without any new scenes for days and days to unlock scenes, but so far that isn't the case.