My advice (even though I'm of course biased)? Keep at it.
The dynamic between Yuuki and Ban is quite interesting and, even though it seems childish, the intention behind their actions is anything but. The raws are on chapter 10 at the moment.
I'm quite enjoying the series (well, I wouldn't be doing this if that wasn't the case). It's a bit difficult for me to write more about it without spoiling the fun.
It's fun to see both of them learning about love through their actions towards each other (but yeah, of course it's a bit weird, as it would be two people actually experience love for the first time on their mid-thirties - but that's part of the fun).