https://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
I know you said not too long. (This is about 70 chapters I think) but please trust me this one is sooooooo good.
Missing love, 10years that I loved you most, life no senjou bokura, tamayura
home far away(haruka tooki ie) — a classic one that always makes my heart break everytime i read it
do you love pain lance
very much
painful heartbreaking bl, not long but not too short