I see, I know some devs export windows builds of MZ games but I don't know how they do it. Looking forward to the 30th !
Well, really there's nothing stopping it from being in a fantasy world, just make it a magical device instead of a phone. Maybe the donations to the stream could then be in the form of mana donations then too, so the lewder she gets, the more mana she receives and the stronger she is, and that could be her motivation to get corrupted. And I'm never gonna turn down an elf FMC ! Still, even if there's a dungeon part again I hope you'll find ways to have more things to do in the overworld.
If you do go with the streaming/phone idea it would be nice if there were social media apps too, I talked about it slightly more in depth on another comment but I think that would enhance the concept.
Looking forward to see what you'll go with !