35-sai, Fujunna Koi

Kari, a widowed single mother, returned to her parents' home and ran into Endo, whom she admired during her school days.
The morning after they finally crossed the line, she heard him muttering the name of his former fiancée in his sleep...
A romantic reunion that will overcome even grown-up adults!

(Source: Ohzora Shuppan, translated)