http://www.mangago.me/read-manga/the_inheritance_of_aroma/ - It's accident though.
http://www.mangago.me/read-manga/banana_fish/ THIS PLEASE
http://www.mangago.me/read-manga/pure_dakkang/
http://www.mangago.me/read-manga/lucky_kun/
http://www.mangago.me/read-manga/boys_love/
http://www.mangago.me/read-manga/watashitachi_no_shiawase_na_jikan/
http://www.mangago.me/read-manga/flowers_of_evil/
http://www.mangago.me/read-manga/towa_ni_nemure/
http://www.mangago.me/read-manga/1999_shanghai/
http://www.mangago.me/read-manga/haou_airen/
Any completed manga where the main character is killed? It can be Yaoi or Straight manga.