She finally tells him properly how she feels. No ending without proper communication!
I love how that watch has the image of a moon on it. Satsuki's name is based off of Tsuki "moon" so it feels appropriate. Also actually cute that they had Suzu with them. Irreplaceable precious memories with family! That Page 15. Oh, my heart. It's been years since I picked this up, and I don't regret going on this ride with many ups and downs with a beautiful ending like this. I will never get tired of happy vanilla romance endings.
This actually got an anime announced!? Well, congrats to the author, I hope whichever studio does this do a good job adapting. I do have an idea whose voice I'd like to hear as Satsuki, but I'll be fine as long as she doesn't sound too off. No anime-original endings, please.