I think the only one that made me wanna cry as far as I can remember was this: Lies Are A Gentleman's Manners. And there's the crying bonus that it's incompletely scanlated and licensed.
oh i do. i like them so much i started collecting them in one list. http://www.mangago.me/home/mangalist/72632/
i titles at the first page are the ones that inspired me to create that list
http://www.mangago.me/read-manga/hana_no_miyako_de/
http://www.mangago.me/read-manga/endless_world/
http://www.mangago.me/read-manga/haru_wo_daite_ita/ ch 24
http://www.mangago.me/read-manga/kosha_ura_no_natsu/
http://www.mangago.me/read-manga/sakura_gari/
http://www.mangago.me/read-manga/trap_min_song_a/
http://www.mangago.me/read-manga/yomigaeru_kiro/
try these
You should really read Paradise View. I'm really into yaoi manga(s) with sad endings. But one thing that really made me cry was http://www.mangago.me/read-manga/paradise_view/ (though this is a sequel of Kimi to Parade) .
**you can try Hana no Miyako de too ( http://www.mangago.me/read-manga/hana_no_miyako_de/)
**Itou-san
These are my top three as of now. Still hunting for more yaoi manga to change this list. (づ￣ ³￣)づ
P.S. You should really check out Paradise view. (▰˘◡˘▰)
thank you everyone (:
does someone know a really sad yaoi or shounen ai which makes you cry so hard you wanna die?