 If you liked
Hotaru no Haka
|
 ...then you might like
Kimi no Suizou wo Tabetai
|
From the very beginning of the movie, it's given that the main character(s) of these movies will die at some point of the movie, and then the stories are being told retrospectively about the short remaining time of their lives, and the emphasis that even though they're in hopeless situations, humans still try and will found some specks of happiness in life.
The difference between the two is that 1945 Japan is a far bleaker setting than modern day Japan.