Cat Eyes: Acrux [Book 2]

They used him as a weapon. She will show him there's more than pain and hate.
Rosy is dealing not only with her life but also with the dangerous evolved humans. However, she receives one of them, wounded, who only conveys emptiness, hatred, and deep sadness with his hypnotic honey-colored eyes.

She's just a curly-haired girl, but he doesn't know why she makes him smile again, if he ever did, and rethink the idea of continuing to live with a grudge.