Looking for any tear-jerker yaoi/shounen-ai... story may end with at least one chara's dea...

Banana fish

king's maker (ongoing)

http://www.mangago.me/read-manga/hana_no_miyako_de/
this one made me cry. it's part of a series but the other 2 stories are happy ones (I'll list them below in case u wana read them too):
http://www.mangago.me/read-manga/hana_no_mizo_shiru/
http://www.mangago.me/read-manga/hana_no_migoro_ni/

http://www.mangago.me/read-manga/kimi_no_yume_o_mite_iru/
http://www.mangago.me/read-manga/10_years_where_i_loved_you_the_most/ - ongoing
http://www.mangago.me/read-manga/ashita_shinu/ - oneshot compilations
http://www.mangago.me/read-manga/hengoku_no_calendula/
http://www.mangago.me/read-manga/kashikomarimashita_destiny/
http://www.mangago.me/read-manga/lonely_to_organdy/

im not sure if any of this will satisfy you but it made me sad/cry

http://www.mangago.me/read-manga/life_senjou_no_bokura/
this one had me pretty close to tears

Killing Stalking
damn son this webtoon make my eyes swollen truly tear jerker sobbed as fuck

December Rain
My starry sky
Momentum
Acid town
A thousand cranes
Ze
Sora o Daite Oyasumi
Lonely to Organd
Hana No Miyako De
Golden days

So I guess that's all my recommendation
I'm a tragedy-genre-lover ٩(๑❛ᴗ❛๑)۶

http://www.mangago.me/read-manga/nigatsu_no_eden/

fuck this one broke my heart ( T﹏T )