2013’s Natural Selection is an ancillary work to Malinda Lo’s Adaptation1.
Amber was born on distant Kurra before moving with her parents to Earth. She looks human enough to pass without notice. None of Amber’s schoolmates know that an alien is among them2.
This piece describes two rites of passage: one on Kurra (obligatory for Imrians like Amber) and one on Earth (not a formal rite of passage, but nonetheless a formative experience for Amber). Amber’s Earth experience takes place two years before her Kurra rite.