http://www.mangago.me/read-manga/blood_bank/
http://www.mangago.me/read-manga/fools/
http://www.mangago.me/read-manga/ginza_neon_paradise/
http://www.mangago.me/read-manga/heaven_hell_roman_company/
http://www.mangago.me/read-manga/heesu_in_class_2/
I kinda feel that they are too common so how about some non complete ones
http://www.mangago.me/read-manga/aporia/
http://www.mangago.me/read-manga/loplop/
http://www.mangago.me/read-manga/interview_with_a_murderer/
The last one is complete but idk if it classifies as tragedy or not
Thank you so much, i'll try to read some inc cause the wait might be worth it (=・ω・=)
Want some complete manhwa with good story, pls no tragedy (￣∇￣") thank youuuu