There's no need to say that, if the spoiler is telling us the truth, no matter what will happen before #244, but it certain will become a mark, as well as the scene itself, there's no need to say that, it's much probably Harima's first kiss, as well as Yakumo's, no mattering if it's accidental or not, it'll be certainly a divisor.
I just hope the story has some serious development after that, with JK not stepping back and creating a situation between Harima and Yakumo/Eri that ends up in nothing more than a situation, instead of a decision.
I expect, as a Onigiri faction supporter, that they will become a definitive couple, but, for me, what matters is that the story is promising from now on, with a stop on the non-sense fillers that came for a while...
But it's definite that the kiss scene will be in at least one fourth of the wallpapers and fanarts in the future... I think we will have even two different versions, the one in the end of #244 and one in the start of #245 (if they do not put fillers), showing the last scene.
Well, the fact is: SR is rulling!!