Beautiful, realistic, and hilarious! It was so fun to see this couple bicker and go through the ups and downs of being in a 15 year relationship, I can definitely imagine it wouldn't be easy, so props to this author for showing all that. The couple was very cute also, but I'd just like to say one thing- 32 isn't that old!
"You broke our promise, so I'm breaking up with you". Two people so in love in high school who decided to elope. Fifteen years later, Kusaka suddenly tells Mikuriya that they should break up. But why?! Mikuriya's so devoted to him, loves him so passionately and has never cheated on him. So he's stressing over this promise that he can't remember. It is then that he recalls a secret that he's never told Kusaka.
This reminds me of a bengali film "belasheshe". The old married couple wanted to get divorce after a long years been together.. the reason? Just like this manga. This is so wholesome