Crynn

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

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

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

i recommend this for quick read
#006 http://www.mangago.me/read-manga/paradise_view/
#019 http://www.mangago.me/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•)

These from 22...
http://www.mangago.me/home/mangalist/815165/?filter=&page=3

http://www.mangago.me/read-manga/dark_heaven/?eBd7

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

THIS!!
http://www.mangago.me/read-manga/specters_karma/