Well, I'm caught up with everything and I remained a Hana x Miyako supporter all the way. That's true love right there.
I enjoy Koko but I feel no excitement thinking about her dating Miyako. The pee-holding chapter was hot, though.
And I really don't care about the other two couples, until chapter 71 I read everything but if I see the chapter focuses on Noah/Hinata or Kanon/Koyori I just pass the pages as quickly as I can (Koyori just gets on my nerves too easily).
For me the greatest relationship is Hinata's love/obsession with Miyako. Nothing can beat it and nothing should.