Some of my favorite heart-wrenching manhwas
https://www.mangago.me/read-manga/betrayal_of_dignity/
https://www.mangago.me/read-manga/my_husband_who_hates_me_has_lost_his_memories/
https://www.mangago.me/read-manga/if_you_wish_for_my_despair/
https://www.mangago.me/read-manga/the_redemption_of_earl_nottingham/
https://www.mangago.me/read-manga/it_was_just_a_contract_marriage/
Special mention https://www.mangago.me/read-manga/this_witch_of_mine/ for a different type of pain

it’s been too long since i’ve read a straight angst that has made my heart physically hurt so if you have any recs pls enlighten me