Try to read "Lonely To Organdy "
I know I cried like crazy
mmmmmaybe Sakura Gari
Good recs so far. Also
http://www.mangago.me/read-manga/itou_san_kuraka_sui/ -keeping in mind the 'alternative universe' bit
http://www.mangago.me/read-manga/inu_to_tsubame/
http://www.mangago.me/read-manga/thank_you_my_god/
http://www.mangago.me/read-manga/zion_no_koeda/
http://www.mangago.me/read-manga/ore_higaisha/ - chapter 4 specifically
http://www.mangago.me/read-manga/restart_harada/
http://www.mangago.me/read-manga/monster_bara_yaoi/
http://www.mangago.me/read-manga/mic_and_neo/
http://www.mangago.me/read-manga/bl_of_the_dead/
http://www.mangago.me/read-manga/bannin/
http://www.mangago.me/read-manga/smells_like_green_spirit/
http://www.mangago.me/read-manga/jigoku_meguri/
http://www.mangago.me/read-manga/mahoroba_no_hibi/
http://www.mangago.me/read-manga/j_no_subete/
http://www.mangago.me/read-manga/g_senjou_no_neko/
http://www.mangago.me/read-manga/endless_world/
These range from tragic to just bittersweet.
I'm looking for a yaoi/shounen ai manga or manhwa that's kinda like Hybrid Child. Something that involves a seme or ukes death, or something enough to make my heart wrenched (Hybrid child fucked my heart up ;-;)