So It Turns Out to Be Easy

As the young daughter of a concubine in the Yan family, Yan Mingyuan remains very calm. Her legal mother (the primary wife) values status and upright character; as long as Mingyuan stays honest and doesn't court disaster, she is sure to marry well compared to her older half-sisters. But then, the eldest daughter (the legal sister) falls gravely ill, coughing up blood. Her husband, the Marquis, looks set to become a widower! Suddenly, Mingyuan's younger sister by the same mother begins to hatch her own schemes...