This is a very touching and funny series, at least for one who is married 37 years and still very much in love.
(It helps that we both have strong otaku leanings.)
I am not prone to weeping from pure sentiment, but I found episode 11, "One Person had Survived On Her Own", particularly moving.
We see Kaoru remembering her single life in a dream.
On the surface, she seems to be doing all right,