I feel like it'd be cool if you could play as a female in this game, and if you lose a fight, you'd get TF'd into a monster girl yourself (perhaps whichever one beat you, or just a predetermined one), and after that, you could choose to continue to be a hero, despite your new form, or choose to side with the monster girls, and beat those adventurers, maybe even get them off your land entirely! it'd definitely take a lot of work, but it could be cool free dlc or something, probably after the main game is finished. just an idea I've had.