Three moments in Takaki's life: his relationship with Akari and their forced separation; his friendship with Kanae, who is secretly in love with him; the demands and disappointments of adulthood, an unhappy life in a cold city.

Two penniless orphans, Black and White, struggle to survive on the mean streets of Treasure Town. When a megacorporation threatens to tear down the town to build an amusement park, Black and White engage in the fight of their life.

A young boy and a girl with a magic crystal must race against pirates and foreign agents in a search for a legendary floating castle.