That last page hit my heart, I never expected this to be a good series when I saw the title and the first chapter, but damn it is good. I guess I will re-read this.
At this point I don't think Makoto has any romantic feelings left for his wife he's fully smitten by Michi. After all those years of being neglected I understand how reasonable it is to fell out of love, at the end of the day it was impossible to reignite your love just because your partner...
I ship them they have good dynamic, however I think it's fitting for the ending that they don't end up getting married or pursuing a relationship. Hints of mutual feelings was enough.