Ok, so I'll be that guy again and I'll compare it to the one-shot.
The making up kind of sets it apart and goes for a more mature and functional relationship, which is completely absent in the one-shot and gives us the possibility of it not going that way.
But at the same time, this is more of a stretch and my view only, but I can't help feeling like Rika might end up being a third wheel and maybe even a rival for Miwa, which again would set it's course for the one-shot ending.
So with these in mind, I guess there's no point in saying that this will be just and expansion of the one-shot since it does give the possibilties for a new story in general, so we'll just have to wait for more.
Thanks again as always for the update!