Age of "tolerance" and "body diversity". Ugh what you're basically saying is "I wanna be lazy and selfish and not change my shitty lifestyle" Ugh it's sad to see.
I just binged the last volume or so, it's not that bad imo. I plan on rereading everything.
Koharu gets divorced and moves back to Tokyo, but not before breakup sex with Ryuu. Two months later Yuzu and Madoka visit to check in on her and they all - Koharu included - find out that she's actually pregnant with Ryuu's child. The Date family then gets back together.