Eris no Seihai

In a world of nobles and social intrigue, Constance Grail, a viscount's daughter, finds herself betrayed and falsely accused. Facing punishment for a crime she didn't commit, she is offered a chance at salvation by the ghost of Scarlett Castiel, a noblewoman executed for her wicked deeds. Scarlett proposes a bargain: possession in exchange for revenge. Connie accepts, and Scarlett takes control, immediately turning the tables on her tormentors. However, Connie soon realizes the deal comes with unforeseen consequences. Bound to a vengeful spirit with her own enemies, Connie must now navigate a dangerous path, grappling with the implications of her pact and the true nature of Scarlett's desires. The series explores themes of betrayal, revenge, and the price of deals made in desperation.