There is nothing really substantive about this video, just a cute music video about a girl and her pet hamster. If you're looking for something of the caliber of his longer works, stick to Beyond the Clouds, Voices of a Distant Star, and She and Her Cat. That being said, the animation is still very crisp and vivid, the song is nice, and watching it is a very enjoyable experience. Apparently, Makoto Shinkai got the idea for this video because one of his friends speculated on how far a hamster will travel in a hamster wheel in its lifetime. Also, people's relationships with pets seems to be a theme in some of his work (She and Her Cat). Overall, I enjoyed this.