I thought that you mentioned BL so these are all BLs sorry I read another question before yours so I mixed up the genres, hope these work as well
https://www.mangago.me/read-manga/haruka_tooki_ie/
https://www.mangago.me/read-manga/perle/ (Manwha)
https://www.mangago.me/read-manga/december_rain/ (Manwha)
https://www.mangago.me/read-manga/reunion/ (Manwha)
https://www.mangago.me/read-manga/a_shoulder_to_cry_on/ (Manwha)
series about sex work https://www.mangago.me/read-manga/deep_love_ayu_no_monogatari/

can anyone recommend manga(s) that will make you cry, like you get sad for a week then forget about it, then when a memory of it pops up again you immediately get sad thinking about it(/TДT)/ .