At the Corner of the Night Skies

Yozora no Sumikko de,
夜空のすみっこで、

Sequel

Falling at Dawn
Yoake ni Furu,· 夜明けにふる、
manga

This story takes place a few years after Hoshino and Sudou have settled down together. Sudou's son Shouta is in high school now and so is his former classmate Daiki from elementary school. How has their relationship changed?