Satsuki's adoptive parents being way more nervous than Naoto was funny.
Man this was so wholesome. I loved how Yayoi kissed her husband to reassure him in his moment of mild insecurity.
Satsuki and Naoto are still young, it's perfectly understandable that they're not ready for marriage right now, and maybe their relationship is the kind that takes more time to bloom.
The handwritten part is a pretty nice touch, that's the kind of thing that can only come from passion, much appreciated!