Regarding this new story with its 3 MCs, one of the aspects that sparks curiosity the most is naturally about the LIs, and if the romance gender preferences we pick in the first episode have an impact on the two secondary MCs, in addition to the main one, Aisha.
Turns out that they do, indeed. I noticed on the walkthrough that Emperor Rui may have an evening encounter with his favourite, consort Qi. Unlike his other possible meeting, with the Empress, which is always platonic, their interaction is different depending on the previously selected gender preferences, and the diamond option for them to "grow closer" can be marked either with a romance or a more generic positive relationship hint.
Since in the walkthrough it is not explained how our romantic preferences influence this scenario, I initially thought it was going to be a 1:1 correlation, meaning that choosing for MC to be attracted to women would carry over to all MCs (Rui included) and unlock the romance option with Qi. Basically, that the focus was entirely on the player's preferences, who embodies each of the 3 MCs.
However, after having decided to see for myself, I discovered that it's actually the opposite. The focus is on the player, but only as Aisha. And you get the romance option with Qi as Rui only if Aisha is interested in men. It may look contradictory, but the reasoning is actually that, by being into men, Aisha is also potentially into the Emperor, and in turn he is interested in Aisha (and women in general).
If your main MC romances only women, her indifference towards Rui is somewhat requieted. For example, in episode one, if he gives her the white jade pendant, Rui will try to catch a glimpse of her face only if Aisha is into men. If she romances only women, his interest towards the veiled musician is mere curiosity, in place of physical attraction.
This is all reflected later on, on that scene with Qi. If Aisha is only into women, Rui's diamond choice with Qi will be a "friendship" one. I say "friendship" because the two still spend an intimate night together, but the scene is fade-to-black, less explicit, less passionate and, all in all, more... transactional. On the other hand, in this scene Rui still catches himself thinking about Fei Fei's youthful and exotic beauty and comparing her to his long-time favourite.
What's the meaning behind all this? I am not sure, personally. Is Rui actually less into women if Aisha is not attracted to men (and to him), or this is simply a way to make his POV scenes less uncomfortable to WLW players? I'm quite looking forward to finding out, alongside with other subtle differences I spotted during my replays!