What would be acceptable levels of grind?
For me? That within the first hour of playing the game I could unlock the first sex scene with the MC. Then by the second hour unlock the second etc. I forget how many hours I have in the game, if I had to guess I would say 10+ maybe more and other than the massage sex scene, I had not managed to unlock a single sex scene for the female MC. Get to spy on the friend, got a couple of those but that's it.
Edit, a example to be more clear what I mean. I got to the point where if you watched tv with your roommate and her BF she would jerk him off right there with all three of you watching tv. IMHO you shouldn't have to do that more than 5 times before unlocking something more, like joining them or something. I did that scene likely a dozen times or more. That to me is just to much, I know there is other factors in play other than that one scene. But that is why i find the game grindy, way to grindy. You do a lot of repeat going to school, clicking through school, rushing home to catch your roommate and BF on the couch, over and over and over. Then all the paths are that way, not sure how many times I went on coffee dates with classmates and they never advanced beyond that other than with the one girl where you can work as a maid at her house unlocked.
I played the game a lot, which shows how good I think the renders, story and writing is a whole, but eventually the grinding just got to me.