Atleast she graduated. and yeah they had pretty much sex all the time. You can look at past chapters and comprehend what they really mean and do. Like she got a hicky on her neck, and playing "sumo", going to a love hotel and all those other shit.
Black haired girl really is the fmc while we are seeing them from the childhood friend's perspective. Chapter 4 is just too shitty but this chapter healed it
I can already tell this flat-chested girl getting jealous and shit when she sees the fabled most beautiful big-tittied girl with the mc. And I'm gonna love it.
Air-head big tits > tsundere petanko
I love how the two ara ara big breasted women doesn't really care about shit. They're just there to tease and watch the (slow)progress between the two.