A wealthy lady and her servant are running a luxury cruiser to enjoy a sunset dinner.
The sisters, Shizuku and Mio Hatori, are arrogant, selfish, and vicious women.
They treat their servant Takejiro terribly, complaining constantly if they don’t like his behavior.

However, their cruiser breaks down and they are lost.

They say, “This is what happens when you are incompetent!” and
The sisters hold Takejiro responsible for the shipwreck.

After drifting for several days, Takejiro, Shizuku, and Mio arrive on a deserted island.

The sisters, until then, had always hated Takejiro, an uneducated, poor man.
However, in this extreme environment, separated from civilization, the sisters and Takejiro’s positions are reversed.
Gradually, the men and women, returned to their wild nature, begin to live on a deserted island, following their instincts.

[From Getchu]