Honestly i'm pretty upset.
This game could be a nice game.
Dialogs are funny, art is ok, scenario is nice, but they have a lot of technicals problems.
I had one: Just before the event "Hot 3", when you and your "sister" try to ciinvince the landlady to keep the sexy wardrobe, they have a ringbell. I skip it because the event could launch. Then passed night, and I'm stucked in the stairs, because i can't go to the first floor.
So i gave up because I was stuck, simply. After 3 hours.
You should had some stuff to "compensate" technicals problems:
-> Direct access to the bedroom since the map
-> Auto save before all events (like 6 or 8 you know).
And I found the grind part was ok because smoothly graduated, but beware don't don't push so far this aspect, because as your arts are good, they are to sparse to enjoy them.