Well, I got baited in reading that one, I'll be honest.
But you know what? Knowing that they end up "together" at the end doesn't really take anything away from what the manga is about. The romance is cute, but it's really just a side to the whole point, which is exploring (a.k.a get off your butt and go outside do shit) and introducing nice, little, interesting sightseeing spots around the country (which the youth of this generation really lack knowledge of).
I can still read almost any chapter of this manga in any order and enjoy it; and each of them would still make me wonder what there might be close to me that I'm missing out on.
If that was not your mindset by Chapter 20, I'm not sure what you were expecting at that point...