Yeah, but to the manga's defense, that was only because the author didn't know what to do anymore.
It's a shame that there wasn't even a realization but it was a funny ride and I really enjoyed it. I knew nothing would happen because of reviews so I didn't have any hopes, though.
I'd love a series about the second set of sisters, they were even better than the main one.
I figure a lot of people are under the feeling the author could easily have conclude with at least a "realizing who they really love" chapter as conclusion instead of just making snowmen. Giving the serie a real sense of closure and not just keeping it open just in case he ever want to pick it up again. There were a lot of setting up for that in the previous chapters, wouldn't have looked out of place for such a chapter to come up at this point. Some might say it was even long overdue.
I'm fine with how it ended myself, because I was more interested in the other couples than the main pairing, but I would have like it better with a proper conclusion, tying up loose end and making that serie properly completed. If the author ever do a sequel like he hinted at, then all good, but if he never does, would be kind of a shame to have such an ending. Sure, it's obvious they'll get together, but I read yuri manga to see actual yuri and girl getting together. If I just want yuri subtext that hint at it without ever confirming it, I just have to pick up any non-yuri slice of life out there. ^^;
Even the little sisters actually discussed their attractions to each other, only the main girls remain mostly oblivious. :/