My Saving Grace

(Modern AU)Agent Henry (Hiccup) and Tyson (Toothless) has been assigned to protect the president's eldest daughter, Elsa, in an undercover mission as high school students. But here's the catch: They can't have any attachment to anyone during their mission. Will Henry be able to fulfill his duty or will sparks fly? (Involves human Toothless and multi-crossovers)