Castor

Sixteen-year-old James Fisher lives on the distant planet of Castor where he toils for the ruling classes as an indentured servant. He's a "Half-Adapt"—one of thousands like him who were shipped to Castor from Earth and biologically altered so they could breathe the planet's atmosphere unaided. As Earth fades in his memory, James resigns himself to life under Castor's strict social hierarchy. But then he meets his master's nephew, Vidal Centa, and their strong attraction for each other begi...