Eventuellt " Frost and Fire " av Ray Bradbury.
Här är några utdrag ur online recensioner:
When a ship, known as a seed, crash landed on the planet ten thousand days ago, it resigned the people to living in the cliffs, the only place they were safe from the sun where it was so hot it could burn them, and the nights were so cold they could freeze.
Detta nämner hans personers centrala karaktär och korta livslängd ...
The plot follows Sim, the protagonist of this story, and his apparently short life on a planet where people are cursed by radiation to live only eight days.
Och det här talar om det korta tidsfönstret som finns tillgängligt varje dag:
The only time of day they can leave is dawn and sunset for only an hour, where they can gather food, and enjoy the outside.
Från andra källor, här nämns flickan:
Lyte is the girl he has chosen to marry. Together they try to discover the secret that might save them and their race from this unfortunate cycle.
~ Redigerad från Wikipedia och frostandfirerodriguez94 och theatermania
Lyssna på ett gammalt radspel (alternativ länk här ) anpassad från boken. Det finns också grafisk roman på bilden.