Can someone name that sadest manga/anime they have ever read/watched?

Mine was the manga "Socrates in Love"

Anime : Da Capo series
Manga : Ai Kora

For me the saddest Animes were Clannad and Elfen lied they were the best i seen so far even thou i am not really an anime fan.
But i highly recommend it for anyone who hasnt seen it to watch it :'(

DUDEEE
this is the first thread on the list, and it's exactly the same as yours >_>
https://www.romulation.org/forum/index.php?topic=29490.0