I don't see these "games" really as games. If I want to play a game I play Call of duty or whatever. The gaming part in these games should be limited to what choices you make, that's the playful part. Devs add grind just to pad games, to pass it as content. That's why I prefer visual novels, because they go to the point and don't waste your time, making the game a chore instead of fun.
This game doesn't have the insane grind some, otherwise great games, have (comes to mind second happiness).
Anyway, the story mode solves any grind and it's really appreciated. Good to see a considerate dev.