To be honest, a favorability system might not be a very good choice for visual novels. Eternal World handles this quite well, though. However, I can say that this work has enormous potential. In my mind, it could reach the level of a masterpiece. I look forward to the updates.
I have to say that the brilliance of many places far exceeded my expectations, to the point of being exaggerated. It is almost the best visual novel among the hundreds of games I have played so far. The slightly horror elements are cautious but also a very attractive part. I even completely ignored the adult content. As for the harem aspect, it would be better if the main story and side stories could be more seamlessly integrated.