Something different

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

(Mc kills herself and gets reborn?)

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

One of my favourite mangas, one of the characters Kill themselves at the end.

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

No suicide but the main character dies at the end

http://www.mangago.me/tag/Suicide/