By Jove! This game needs serious reballancing as this just a boring grindfest with little to none rewards. What is the point of levelling up by one mere point a day in virtually any stat if the main factor is a dice roll anyway? Let's put the non-sexual, survival RPG parts aside for a while and look at the slave management portion.
Psychological realism of interactions between the MC and his live-in slaves comes out as nerdy and awkward to say the least. So you think that with relatively high manipulation and charm skills your MC will have an easy task of pimping his way into a slave's heart, without ever having to send her to your barebones 'dungeon' to beat the crap out of her to lower her 'willpower'? Think again! Being genuinely nice actually increases the willpower of your slave and can make her defiant. You compliment her, but it doesn't land well, because diceroll = not good for you, fool! Doesn't really matter that you live in a well mainteined house, put food on the table every day, take the girl out and then... just be a man and demand that she washes your back that you break for the two of you day in day out and she's angry... because the task is so demeaning and willpower draining. Why isn't she impressed by your industriousness and self-reliance, the garden, workshop, academic achievements? You wake up in the morning, hunt for food, give lectures at the Academy, sell stuff with profit, come home and ask 'how was your day, honey?' to which your strong-willed slave (living in a world where slavery is normal) replies she's not talking to you after what you've done to her, you monster! You took her out to a nice fast food joint, ordered an everything burger for the both of you, joked around, raised her mood and disposition towards you and then you went and spoilt it all by doing something stupid like demanding she scrubbed your back and sucked you off. Which she did and now she's angry. And there was no option to thank her for the blowjob after all, so this might have smoothen the situation, or explain yourself in the morning by saying "Listen hun, I know I acted like a beast last night, but you are so delicious that I turn into one just by looking at your lips. Besides, you could've said no, but went down on me anyway. So my guess is, since you did not bite my dick off, it wasn't all that bad for you, was it? Why don't we try this again sometime to see if you really, absolutely don't like the taste of my cock, ok? Your oral stats are quite high, so perhaps there'something off about my dong, which I would really appreciate if you told me, so I could, I don't know, modify my diet or hygiene routine...? C'mon! Talk to me, babe!"