A House Without Fangs

The protagonist wakes up to find herself transmigrated into a strange world as Viola, a young vampire in dire straits. Viola is the 7th-born of one of the last remaining vampire families, who disguise themselves as a normal noble house, the Thorne Viscounty. She must endure in an era past the former glory of vampires, now reduced to nothing but rumors and myths as they lick their wounds, waiting in the shadows of high society. Five years after her transmigration during the awakening of her vampiric power, she discovers she is not like the vampires of the current age, and she now craves more than being a nobody living in the shadows; she has a strong, uncontrollable urge to rule.