To be concise, this was an excellent story told in a short time frame with a simple yet engaging plot to anyone who is in their late teens or older. The soundtrack and animation were phenomenal as well. The characters were not the most complex, but given the subtleties they exhibited and the length of this piece, I'd say they were well-developed enough. They changed and grew through their interactions with each other and felt human.
I'll even admit that I teared up a little with the final scene before the two characters part ways.
Check out the movie. It's less than an hour long and you won't regret it.