you know, I had just realized that, as well. While there is more than a little girl on girl action, Yoon hasn't been engaging with any guys as of yet. I say 'yet', because I'm hoping that the content wishes I had posted about earlier come to pass [ie., letting Yoon let go and allow experiences to engulf her, as opposed to just wading in the shallows. etc.]
And to be frank, the dev has handled the increasing tension of the plot thus far rather well. Unlike in some other games, where we are left wanting because the development is parsed out in dribs and drabs, there is a solid foundation being crafted here. I find myself really looking forward to Yoon exploring her sexuality to the extreme with both male and female partners, and setting aside parts of her very modest cultural heritage to just let go. For me, that surrender is is 90-percent of where I get my thrill - though I cannot speak for anyone else's triggers and/or kink.
And I am left with the impression, from the foundation that has been built, that enough paths are going to be set in place where that will happen, be it straight, bi, gay or some freaky Roman orgy.
Honestly, my last sentence there speaks to perhaps the only problem I have had with the game thus far, and I guess that while it is a kink for some, I am finding the inclusion of only black guys in the orgy scenes as problematic.