To join in on the ongoing discussion here: I think first of all they should implement a way for Yona to get consensually raped. I know, that sound silly, but I mean consensual for the player and well, rape for her. The fact that to me as a player, a wild werewolf and a wild bigfoot etc. are worth more than the same thing with time and effort invested into is quite stupid in my opinion. Additionally, once you have leveled Yona a lot because the story demands it, to get any rape scene you still need to lose and eating a mandrake doesn't cut it because that kills her on the spot and doesn't just down her. This means that if I feel like viewing the spider's rape scene, for example, and I'm in late game, I'll have to stand there and get slapped around with Yona for genuinely several minutes, or still like half a minute at 10x speed.
I think it would be rather easy, from a coding standpoint, to just add a button on tamed enemies that lets me get Yona raped.
One of the biggest sins of a h-game is to get less scenes as the game goes on. As it stands now, both with the permanently dead bosses and with how hard it is to get Yona raped later on, Mad Island suffers from this massive problem.