Asteroid Hope by S.J. Talbot

When your sister is famous for loving a Relican, love is the last thing on your mind.

Despite the fact that she’s now living on a moon-sized space ship instead of Earth, cellist Clementine is determined to keep her life as normal as possible. She brought a suitcase filled with her favorite breakfast snacks, started an orchestra, and is even striking up a romance with Zack, the boy next door. But between vandals, thieves, and sexy but unattainable Relicans, navigating this new world isn’t easy.
When Inlan, musician and dedicated member of the Relican Squad, is assigned to join Clementine’s orchestra as cover for a secret mission, he’s eager to prove himself to his new commander. As he travels deeper into the unpredictable world of humanity, however, he soon begins to question his capabilities both as a soldier and a musician. And the more time he spends with Clementine, the more he begins to question his loyalties to Relica itself.