Bound by Blood: The Hybrid’s Bodyguard

Half-blood assassin Diana, carrying both werewolf and vampire bloodlines, takes a high-paying mission to protect poisoned vampire noble Adrian Vance in exchange for suppressant drugs. They form a blood pact, bound by each other's blood. Fleeing family assassins and werewolf ambushes, they grow closer amid life-and-death struggles—and finally fight both races and a dark villain for each other.