I'm gonna set my predictions here, since someone told me the series has already ended: they're not gonna date, there won't be any confession, and (the one I'm saddest about) she's not gonna touch his penis. On the other hand, I think Kazoe will start talking about this stuff with her family and start learning it without relying solely on Hanazono. The two will continue talking about dirty stuff, but more personal topics will be approached. She'll visit his house once.