Responses
are you looking for New York New York?
http://www.mangago.zone/read-manga/tamayura_yuki_ringo/ - There're 2 endings, both are great.
ah yes its this one, thank you!!
beta
a bl set in the olden days? anyways, main part is that at the ending, it shows them as old grandpas, and i think one of them dies?? its a bittersweet ending and i rmbr crying. it was v angsty, but they ended up together and grew old together too