http://www.mangago.zone/read-manga/haikei_niisan_sama/
god, this one broke me...
~ http://www.mangago.zone/read-manga/hero_heel/ ~
• Never in my life have I wished the seme would suffer so much
• The uke is unbearably dumb for still loving the seme
• The side character who loves the uke is the only one you'll like, probably.
✓ This manga is an absolute tear-jerker.
Hope it helps..
http://www.mangago.zone/home/mangalist/215/
No yaoi fan will regret reading this gem and it fulfills your criteria http://www.mangago.zone/read-manga/mede_shireru_yoru_no_junjou/
http://www.mangago.zone/read-manga/animal_x/
This manga is sooo sad! Trust me! The uke's life is soooo fucked up. Nothing has ever been in his favor. He's a strong guy tho given everything he has to endure.Even the sex scene is sad. The drawing is old but the story is unique and different from the other yaoi manga.
ANY shounen ai/yaoi mangas that'll make me cry and suffer ..
it can be about uke/seme or both having a really terrible past or just a really sad love story.
basically anything that'll break your heart (╯°Д °)╯╧╧