Not OP by I’ve been watching the thread because I also enjoyed the scarcity of resources (
Overgrown Genesis would be another game that had that and I enjoyed but otherwise plays completely differently, being an RPGM game with real-time combat), but also the concept of giving the MC different stat changes based on what creatures have inseminated her, which is a mechanic I had been thinking of using if I ever make an eroge myself.
I really liked the combat system as a whole actually, with different abilities based on whether you kept her clean or corrupted, the various weapons having tactical advantages against various enemy types, and different skills you could prioritize based on your play style. I haven’t seen many adult games where the combat system and character progression were so fleshed out and actually engaging. The amount of XP grinding also felt just right to make you feel like you had to work toward a goal without turning into a repetitive chore. You actually felt like you got better at strategizing against each type of foe rather than just incrementing numbers.