Kyuuketsuki e Yomeiru Hi: Shoujo ga Reikoku Otto ni Aisareta Kiroku

Suzune is labeled a "cursed child" after a local priest, upon seeing her blood, attacked her, leaving a scar on her back. Her family, in debt, sold her—rather than her twin sister—to a pleasure district island, where she works as a maid, forced to wear a mask to hide her condition and suffers regular abuse. When Yakumo, a powerful business leader who controls the surrounding sea, visits the island, he is drawn to Suzune by her distinctive scent and insists on taking her, despite her background. A romance unfolds between them, forming the basis of a Cinderella-style story involving a union with a vampire.