Yeah, I think this needed one more chapter if we were to get any closure.
I think part of the issue is that this was a gag manga that slowly decided to force romance into it, despite there being no real purpose to it. He had no romantic chemistry with the girls in the club, and the girls he DID have chemistry with were secondary. Then they felt they had to pay off the romance, but didn't give themselves time to show how that would work.
So one extra chapter. Show how the new relationship works, maybe some wacky moments of their new life together. It just needed a little something more.