This is criminally underrated. It's such a shame that this doesn't have an English dub, but don't let that stop you from giving this a watch. Summer Days with Coo combines supernatural mythology elements into a beautiful slice of life, following a family on its journey of growth via their special magical pet. Coo himself has his own epic journey, that begins tragically but ends happily. Coo, though not human himself, is treated as a true sibling and goes through an array of human emotions. While deeply moving at times, the movie also possesses fantastic & intelligent comedic relief (no exaggerated manga effects for comedy)and plot-twisting drama. This is a true masterpiece - one of the greatest stories told, and really deserves an English dub.