Eren, a lone wolf is raised by the enemy, the vampires. Seeking revenge for what rogue wolves done to his pack, he uses the vampires to help him. He broke the main rule among werewolves; to never fall in love with a vampire. But the rule shouldn't count if the cold mean vampire by the name of Levi is his mate. When new problems arrive, can his relationship with Levi hold or will it fall apart?