Kazoku Robinson Hyouryuuki: Fushigi na Shima no Flone

Flone leaves Switzerland with her family for Australia, where her doctor father hopes to put his skills to use. A storm wrecks their ship, leaving them stranded on an uninhabited island.

The family builds a home in the trees and learns to produce necessities from the island's resources. Food, shelter, and the forces of nature demand constant cooperation, but Flone and her brothers also discover adventure while holding on to the hope of returning to the wider world.