when i read this manga at first i was confused about "too many" side characters showed in mini arcs and for me it was a bad point of view having the main story "delayed".
But then, piece by piece or couple by couple (triple), they are all amazing and in this last chapter a sort of tale of how the others do is heartwarming.
Since the train travel and the beach arc i really love the fluff of the main couple, in this chapter they surpass even beyond that point.
Now is time for "A Kiss And A White Lily" Plus(if you know what i mean), with at least one chapter of college for each couple, then adult life, marriage, children.... and more fluff moore (read it like Zoidberg from Futurama when Zoidberg goes crazy over anchovies )
..and anime adaptation.