This game started in the tradition of the violated heroine style - the type where a virginal female warrior has a quest to accomplish and most, if not all, of the lewd content is the result of losing a battle and getting raped - so that contradiction was built into it. While that problem has been present in most games of that genre, this one wisely expanded to have more consensual and turning-the-tables topping content as well. These did come later, though, so they're not as baked in as the loss-rape at the heart of it.
To keep the structures in place despite the wider options for lewd encounters there's a vague rumor that only virgins can beat the Demon King and most of her generals are clearly trying to steal Hiro's virginity as much if not more than they're trying to defeat him.
By winning you can mainly top the characters that appeared the first, Brigand, Centaur, Goblin, Slime, Beastmistress. Others don't let you dominate them, or, like Minotauress and Demon King, male you feel more like the were power bottoms and in control.
So, the tendency was rather forgetting that you can “turn tables” on your enemies, instead adding entirely submissive characters that are weaker than you (Kylira, Trudy) or are women (Alara), I suppose. Even the consensual stuff is all about you getting accused in being easy, and questions like “how did you make it this far with this attitude”.