Luce: Fukushuu no Tame Reikoku Koushaku no Keiyaku Zuma ni Naramasu

When Claudia's father dies, her stepsister ensures she loses everything—her family, her home, her status—and sells her to live out the rest of her days in a squalid brothel. At her lowest point, one person reaches out to her: a ruthless marquess known across the nation as the Crimson Devil. Vowing revenge, Claudia joins hands with the marquess to rebuild her life as his wife, Luce, and seeks out revenge against her stepsister. What comes to follow is a tale of revenge that will shake the very foundations of the nation's court... (Source: POCKETCOMICS)