I Tamed a Queen and Became Invincible

Issac Sutton's awakening went wrong, and the botched attempt bound him to a contract with the Vampire Queen. Instead of ending as a failure, he finds himself handed a gift from the system that promises to change everything he thought he could become. Caught between a powerful immortal ruler and a destiny he never asked for, Issac must navigate a relationship that is as dangerous as it is unexpected.