pain

http://www.mangago.zone/read-manga/the_god_of_pain_s_groom/

http://www.mangago.zone/read-manga/incidentally_living_together/?SCVW this..gosh..tore my heart out and stepped on it
http://www.mangago.zone/read-manga/broken_season_revised/ the storyline isn't necessarily sad but the author's writing and word choices is
http://www.mangago.zone/read-manga/banana_fish/
http://www.mangago.zone/read-manga/i_will_be_waiting_for_you_in_1999/ ;( uhum yep yep
http://www.mangago.zone/read-manga/back_to_school/?DpNc lol this one is just personal, cried out of anger
http://www.mangago.zone/read-manga/spring_snow_odongtong/
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
http://www.mangago.zone/read-manga/a_man_like_you/?FHP6 not a sad story but It will make u cry

http://www.mangago.zone/read-manga/rental_onii_chan/
http://www.mangago.zone/read-manga/cry_for_me/
http://www.mangago.zone/read-manga/this_witch_of_mine/?G4MD
idk i felt sad when reading these

http://www.mangago.zone/read-manga/december_rain/

http://www.mangago.zone/home/mangalist/532739/

TEARJERKER
http://www.mangago.zone/home/mangalist/636848/
list is a collection of
• happy ending
• bittersweet
• sad/tragic

i recommend this for quick read
#006 http://www.mangago.zone/read-manga/paradise_view/
#019 http://www.mangago.zone/read-manga/hypnosis_mic_hoshi_ni_naru_made_doujinshi/

You can check the comments section if you want to know which mangas have happy/bittersweet/tragic ending

Follow the list to be updated. And if you liked the mangas/manhwas I included, please do recommend. Enjoy~ (人 •ᴗ•)