Drama , etc. Manga...

I could name a ton, but my go-to is "Watashitachi no Shiawase na Jikan".

I honestly can't think of one as heartbreaking, lol.

Oyasumi Punpun made most of the people cry

Sakuragari or Sakura Gari? I dont know if this will make you cry hard, but it definetly made me cry

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

T_T