Tanpen Unico: Kuroi Kumo to Shiroi Hane

In a city darkened by industrial smoke, Unico meets a rat named Garappachi, who introduces him to the ailing Chiko. Her kindness reaches him despite her illness, and he sets out to find somewhere she can breathe freely.

The polluted clouds refuse to release their grip, following them beyond the city. With Chiko growing weaker, Unico turns toward the source of the smoke, determined to bring clear skies back to his new friend's world.