This was the first volume. The other girls get focus volumes that both follow the same basic pattern while not letting the meta-narrative slip. We're in V5 without any definitive resolution in the offing.
I figured it would be something like that. Usually the case that these ads cover just one arc (if that, I guess). Thanks for telling us.
It was... Fine? Putting aside the cutoff ending, it was pretty by-the-numbers in terms of plot and progression. Not that I
necessarily mind, I'm always up for fluffy romance with minimal icky elements. If it had continued on to the other girls, I might have enjoyed it. Not a huge loss in the grand scheme of things, but still disappointing.
Back when it stalled at chapter 8 I had been convinced the MC was actually the chosen fiance and he just hadn't heard it from his family yet because he cut off contact with them.