However, with their dreams of scholarships and good universities on the line in their senior year of high school, the twins are having difficulty maintaining their straight A grades. Even if they are opposites in some ways, in other ways they are perfectly in sync with their twin. “Twins Hunter and Lindsey Clarke have been best friends for as long as they can remember. As Crossfire winds down to it’s finale, it’s finally time to announce the ninth SapphireFoxx comic! Our next illustrated adventure is called Exchange Siblings, and it premieres May 12th! After the sci-fi action of Crossfire, I thought it would be a nice change of pace for the next comic to be something that is literally down-to-Earth.