Even after seeing Luke find his mate, Nathan isn't sure he has one. They've been engineered in the same lab and spent the first years of their lives together, but they're different, and Nathan knows it might mean there's no one out there for him. But even if there was, he's only nineteen, too young for any kind of serious relationship, even though his best friends are both happy with their mates. Felix is half-demon, and he doesn't have a mate. It's not like he wants one, but he wishes his mother would stop throwing full-blooded demons at him in the hopes that he'd pick one and marry him. He's not sure why she's doing it, but he's had just about enough. When Felix and Nathan meet, Felix is elated—and Nathan runs. Their relationship isn't the only thing they have to learn to navigate, though. Felix's mother is still trying to get him to marry a demon, and there's a new drug in town, one that has a devastating effect on shifters. Will they be able to make it through, or will the pressures on their budding relationship be the end of it?