They got you with preview screens huh? Yeah me too buddy.
Very much not worth it, extremely grindy with very little payoff. All that is going on is girl jerking off without much of your input for a LONG time, you do that, get points, get more shit, more points, more shit, more points, you get the idea.
The only reason that i'm giving it 2 is that model of the girl is truly phenomenal, no less than modern standart for any developer. The way lightning works on her skin, liquids textures, skin itself, expressions and breathing, even sound design is nice. Whoever was responsible for the technical side, supreme job.
As a game absolutely do not recommend however, waste of time. Maybe if someone will drop a full save.