http://www.mangago.zone/read-manga/burns/
I absolutely hate tragedy mangas but I actually lied this one lol. Its short but is crazy good
this one made me sad for a day so
dozo
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
http://www.mangago.zone/read-manga/maki_chan_wa_kare_to_sex_shitai/
I just read this yesterday and honestly I have conflicting feelings on it. It had a sad story, but I was not able to connect as much with certain parts of it. I still recommend it though because everyone has different tastes. ┑( ̄Д  ̄)┍
Someone recommend me a really tragic BL manga