I'm going to be short: watch it.
I've never seen such a gorgeous photography in a japanese movie as I've seen in this one. The story is sweet, the director is really good, the movie is filmed in a really "tenderhearted" way, 99% with no cringe. Imagine a cherry tree blossoming, that is the vibe that this movie gives.
okay, I could stop here but there is a character counter on this thing so let's continue. The acting is top notch, as well as the chemistry between the two protagonists. there are many memorable scenes, and I'm not talking about great and dramatic moments, it's a movie made of simple things that will warm your heart leaving you with a really nice feeling.