honestly man, there gonna be drama down the road obviously, but the only tragedy im actually expecting out of this, is the one in the manga title (we stopped breeding), by the end they are gonna end up together, but never be able to have kids because they are siblings is going to be the real tragedy or something lol, manga description give me hope too "pure and forbidden love story", and there is author previous work too
i did read chapter 8 already, but well yeah lol