General spoiler only at bottom of review.
Cute and sweet, slice-of-life epilogue to the series. It's simple and light and I found myself smiling a lot. It’s a nice and very satisfying end cap to the series story. I wouldn't recommend it unless you've seen the series first, otherwise you'll be missing the emotional foundation of the main couple's bond. The secondary couple were less annoying to me in the movie (and didn't get much screen time, which I was fine with).

I appreciated how Adachi and Kurosawa learned to communicate better with each other and started to approach things in their lives as a team.

The lead actors are so good with their eyes and facial expressions. Everything is 100% believable until there's close romantic physical touch, then it feels ever so slightly stiff. Even so, there are some nice hugs and the way they look at each other holds so much emotion.

The cinematography is nice but the music is not memorable.

GENERAL SPOILERS.
The introduction to the families was a nice blend of realism and fantasy. Some realistic tensions were brought up, but then were resolved fairly quickly, which kept the overall tone of the movie bright. The family members with concerns showed a lingering internal worry even as they made efforts to be accepting, which I thought was a nice, more realistic touch than doing a 180 in 5 min.