Two enemies—a witch-student of the Academy of Kolonossers and a vampire—the True-Born. They genuinely hate each other.
But they will tell their children “how I met your mother”:
“Creature, you’ll be my dinner!”
“Swine, and I’ll defend my diploma on you!”
He needs to hide.
She needs to make him into a diploma project (at least as a scarecrow).
And in the process, unite two countries that have been at war for centuries.
And basically... Suck it, you tusked one!