On the night of her 13th birthday, Rosamiris, the eldest daughter of the Count of Latiano, recalls the memories of her six past lives in which she met a gruesome death due to a curse. “It’s the seventh time, huh? And it’s the curse of decay, the one I least want to remember.” Furthermore, a young lady with the same name as the woman who stole her fiancé in her sixth life is set to arrive as an adopted daughter. Determined to live selfishly, Rosamiris embarks on a plan to reform the thieving young lady in order to avoid the engagement annulment event, which is one of the reasons for the curse. However, her actions inadvertently help the young lady grow, and ultimately Rosamiris ends up being liked by her…? Having experienced all kinds of misfortunes, the count’s daughter has become mentally strong. She doesn’t falter even when bullied, and instead overpowers her assailants while living selfishly. Her actions guide those around her in a positive direction, and she becomes liked and adored by various people. This is a story of her finally grasping happiness in her seventh life.