This game single-handedly made every other lewd game worse by existing.  There should be a rating system that has more than 1  number, because this has full marks on lewdness, humor,   story,   hidden stuff,   ...

But enough praise,   the game is tagged and categorized horribly. You find it by accident, but not when searching for Adult games. Educational genre, hah.  I am sure the Princess learned a lot.   I found it when clicking on genre   Simulation and saw Witch Trainer.   Well, maybe there are adult markers I cannot see.