This was really cool, I had never seen a VN that makes such strong use of IRL acting and video - Really made it feel more like a unique multimedia project! And it was surprisingly wholesome too, especially the remark "Remember, there is no perfection in living, [...] and the best kind of songs aren't in tune!"
And yes, the rap route is really silly. I loved it. Seems like the kind of fun, loose expression that would make someone in Robyn's situation feel lighter!
Super fascinating story overall, I'm wondering what you'll make of it as you develop it further!