"UnHappy" Sad Ending Dramas

Dramas that don't have a happy ending, it may be the saddest - be ready to cry lots. Ratings indicate I've watched them despite the non-happy endings, and some of the not so happy ending were worth the sadness at the end if they have a high rating. If there is no rating, I know that the ending is devastating and I have not watched them. Watch at your own emotional risk.