Simply beautiful.
The snow covering the town gives off cold and warm feeling at the same time, which also gives a sense of comfort.

I thought this film would only revolve around Hiroko and Itsuki exchanging letters, but at some point I thought "If there was a flashback scene which shows the moment when Itsuki male is still alive with Hiroko or Itsuki female, it would be more interesting", and finally the female Itsuki reminisced about her school days when she was in the same class with the male Itsuki (Hiroko fiancee), which I could say the first love vibe was very thick and the fact that those many sweet moment can't be repeated or even continued makes it painful.

I can't help but cry, the desired happy ending that can't come true and dealing with loss and grief is so suffocating, even though healing will happens over time.