I really liked the anime, and before explaining why, yes, I read the manga. The manga is better, but the anime is also good (not as good as the manga but ok). First of all, if you've never read the manga, do not watch it. Because you won't understand and will hate it. After reading the manga, you can enjoy this pretty small anime, acclaimed by critics. The opening and ending song are just awesome and soft, and for me the animation was a gift for those who read the manga, like having the "taste" of a real anime. After all, Sayaka Mogi is anew mangaka, and as I searched (not sure) this was his first manga. I think it was proposital to do not explain all in the anime, otherwise the animation wouldn't have 4 minutes of duration~ hope you guys enjoy pupa