
Read the afterword, author wanted to show that after getting hurt, Yaku wasn't able to recover, and Hino was successful in healing him.. But author couldn't potray that very well.. no character growth for Yaku.... may be he started feeling for Hino but suddenly just saying "I love you" doesn't adds upto apology and character development..

Now I want to see their kids man!!!!

https://www.mangago.zone/read-manga/ibitsuna_bokura_no_katachi/ are you talking about this one?? Your description matches with this plot..but its not from the same author
Realistic