My Slain Dragon Bride

To achieve the ultimate power, the final key was required: the heart of the Crimson Dragon, Valdrova. Standing before her, the protagonist never imagined that his own betrothed would be the target. Yet, surprisingly, Valdrova offered up her heart without a single sign of resistance. Left with an unexpected emptiness and a bitter taste of regret, the killer soon confronts a chilling reality—a despair far older, heavier, and deeper than the hatred he had carried for a lifetime.